HERCULES OFFSHORE, INC. COMMON STOCK UNDERWRITING AGREEMENT

Exhibit 1.1

9,200,000

HERCULES OFFSHORE, INC.

COMMON STOCK

UNDERWRITING AGREEMENT

October 26, 2005

CREDIT SUISSE FIRST BOSTON LLC

CITIGROUP GLOBAL MARKETS INC.

▇▇▇▇▇▇▇ & COMPANY INTERNATIONAL

DEUTSCHE BANK SECURITIES INC.

▇▇▇▇▇▇ ▇▇▇▇ INCORPORATED

As Representatives of the Several Underwriters,

c/o Credit Suisse First Boston LLC,

Eleven Madison Avenue,

New York, N.Y. 10010-3629

Dear Sirs:

1. Introductory. Hercules Offshore, LLC, a Delaware limited liability company, which will convert into a Delaware corporation and change its name to Hercules Offshore, Inc. in the Conversion (as defined herein) prior to the First Closing Date (as defined herein), proposes to issue and sell 6,250,000 shares of its common stock, par value $0.01 per share (“Securities”). References in this agreement to the “Company” which relate to a period of time prior to the Conversion refer to Hercules Offshore, LLC and references to the “Company” which relate to a period of time after the Conversion refer to Hercules Offshore, Inc. The stockholders listed in Schedule A hereto (“Selling Stockholders”) propose severally to sell an aggregate of 2,950,000 outstanding shares of the Securities (such 9,200,000 shares of Securities to be sold by the Company and the Selling Stockholders being hereinafter referred to as the “Firm Securities”). The Selling Stockholders also propose to sell to the Underwriters (as defined herein), at the option of the Underwriters, an aggregate of not more than 1,380,000 additional outstanding shares of the Securities, as set forth below (such 1,380,000 additional shares being hereinafter referred to as the “Optional Securities”). The Firm Securities and the Optional Securities are herein collectively called the “Offered Securities”. As part of the offering contemplated by this Agreement, CSFB (the “Designated Underwriter”) has agreed to reserve out of the Firm Securities purchased by it under this Agreement, up to 460,000 shares, for sale to the Company’s directors, officers, employees and other parties associated with the Company (collectively, “Participants”), as set forth in the Prospectus (as defined herein) under the heading “Underwriting” (the “Directed Share Program”). The Firm Securities to be sold by the Designated Underwriter pursuant to the Directed Share Program (the “Directed Shares”) will be sold by the Designated Underwriter pursuant to this Agreement at the public offering price. Any Directed Shares not subscribed for by the end of the business day on which this Agreement is executed will be offered to the public by the Underwriters as set forth in the Prospectus.

Prior to the First Closing Date, the Company will convert into a Delaware corporation and all of its membership interests will convert into a total of 23,922,850 shares of Securities as contemplated by the Prospectus (the “Conversion”).

The Company and the Selling Stockholders hereby agree with the several Underwriters named in Schedule A hereto (“Underwriters”) as follows:

2. Representations and Warranties of the Company and the Selling Stockholders. (a) The Company represents and warrants to, and agrees with, the several Underwriters that:

(i) A registration statement (No. 333-126457) relating to the Offered Securities, including a form of prospectus, has been filed with the Securities and Exchange Commission (“Commission”) and either (A) has been declared effective under the Securities Act of 1933 (“Act”) and is not proposed to be amended or (B) is proposed to be amended by amendment or post-effective amendment. If such registration statement (the “initial registration statement”) has been declared effective, either (A) an additional registration statement (the “additional registration statement”) relating to the Offered Securities may have been filed with the Commission pursuant to Rule 462(b) (“Rule 462(b)”) under the Act and, if so filed, has become effective upon filing pursuant to such Rule and the Offered Securities all have been duly registered under the Act pursuant to the initial registration statement and, if applicable, the additional registration statement or (B) such an additional registration statement is proposed to be filed with the Commission pursuant to Rule 462(b) and will become effective upon filing pursuant to such Rule and upon such filing the Offered Securities will all have been duly registered under the Act pursuant to the initial registration statement and such additional registration statement. If the Company does not propose to amend the initial registration statement or if an additional registration statement has been filed and the Company does not propose to amend it, and if any post-effective amendment to either such registration statement has been filed with the Commission prior to the execution and delivery of this Agreement, the most recent amendment (if any) to each such registration statement has been declared effective by the Commission or has become effective upon filing pursuant to Rule 462(c) (“Rule 462(c)”) under the Act or, in the case of the additional registration statement, Rule 462(b). For purposes of this Agreement, “Effective Time” with respect to the initial registration statement or, if filed prior to the execution and delivery of this Agreement, the additional registration statement means (A) if the Company has advised the Representatives that it does not propose to amend such registration statement, the date and time as of which such registration statement, or the most recent post-effective amendment thereto (if any) filed prior to the execution and delivery of this Agreement, was declared effective by the Commission or has become effective upon filing pursuant to Rule 462(c), or (B) if the Company has advised the Representatives that it proposes to file an amendment or post-effective amendment to such registration statement, the date and time as of which such registration statement, as amended by such amendment or post-effective amendment, as the case may be, is declared effective by the Commission. If an additional registration statement has not been filed prior to the execution and delivery of this Agreement but the Company has advised the Representatives that it proposes to file one, “Effective Time” with respect to such additional registration statement means the date and time as of which such registration statement is filed and becomes effective pursuant to Rule 462(b). “Effective Date” with respect to the initial registration statement or the additional registration statement (if any) means the date of the Effective Time thereof. The initial registration statement, as amended at its Effective Time, including all information contained in the additional registration statement (if any) and deemed to be a part of the initial registration statement as of the Effective Time of the additional registration statement pursuant to the General Instructions of the Form on which it is filed and including all information (if any) deemed to be a part of the initial registration statement as of its Effective Time pursuant to Rule 430A(b) (“Rule 430A(b)”) under the Act, is hereinafter referred to as the “Initial Registration Statement”. The additional registration statement, as amended at its Effective Time, including the contents of the initial registration statement incorporated by reference therein and including all information (if any) deemed to be a part of the additional registration statement as of its Effective Time pursuant to Rule 430A(b), is hereinafter referred to as the “Additional Registration Statement”. The Initial Registration Statement and the Additional Registration Statement are hereinafter referred to collectively as the “Registration Statements” and

individually as a “Registration Statement”. The form of prospectus relating to the Offered Securities, as first filed with the Commission pursuant to and in accordance with Rule 424(b) (“Rule 424(b)”) under the Act or (if no such filing is required) as included in a Registration Statement, is hereinafter referred to as the “Prospectus”. No document has been or will be prepared or distributed in reliance on Rule 434 under the Act.

(ii) If the Effective Time of the Initial Registration Statement is prior to the execution and delivery of this Agreement: (A) on the Effective Date of the Initial Registration Statement, the Initial Registration Statement conformed in all material respects to the requirements of the Act and the rules and regulations of the Commission (“Rules and Regulations”) and did not include any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary to make the statements therein not misleading, (B) on the Effective Date of the Additional Registration Statement (if any), each Registration Statement conformed or will conform, in all material respects to the requirements of the Act and the Rules and Regulations and did not include, or will not include, any untrue statement of a material fact and did not omit, or will not omit, to state any material fact required to be stated therein or necessary to make the statements therein not misleading, and (C) on the date of this Agreement, the Initial Registration Statement and, if the Effective Time of the Additional Registration Statement is prior to the execution and delivery of this Agreement, the Additional Registration Statement each conforms, and at the time of filing of the Prospectus pursuant to Rule 424(b) or (if no such filing is required) at the Effective Date of the Additional Registration Statement in which the Prospectus is included, each Registration Statement and the Prospectus will conform, in all material respects to the requirements of the Act and the Rules and Regulations, and neither of such documents includes, or will include, any untrue statement of a material fact or omits, or will omit, to state any material fact required to be stated therein or necessary to make the statements therein not misleading. If the Effective Time of the Initial Registration Statement is subsequent to the execution and delivery of this Agreement: on the Effective Date of the Initial Registration Statement, the Initial Registration Statement and the Prospectus will conform in all material respects to the requirements of the Act and the Rules and Regulations, neither of such documents will include any untrue statement of a material fact or will omit to state any material fact required to be stated therein or necessary to make the statements therein not misleading, and no Additional Registration Statement has been or will be filed. The two preceding sentences do not apply to statements in or omissions from a Registration Statement or the Prospectus based upon written information furnished to the Company by any Underwriter through the Representatives specifically for use therein, it being understood and agreed that the only such information is that described as such in Section 7(c) hereof.

(iii) The Company has been duly organized and is validly existing in good standing under the laws of the State of Delaware, with power and authority (corporate, limited liability company and other) to own its properties and conduct its business as described in the Prospectus; and the Company is duly qualified to do business as a foreign entity in good standing in all other jurisdictions in which its ownership or lease of property or the conduct of its business requires such qualification, except where the failure to be so qualified or in good standing would not, individually or in the aggregate, have a material adverse effect on the condition (financial or other), business, properties, results of operations or prospects of the Company and its subsidiaries taken as a whole (a “Material Adverse Effect”);

(iv) Each subsidiary of the Company has been duly organized and is an existing limited liability company in good standing under the laws of the jurisdiction of its organization, with power and authority (limited liability company and other) to own its properties and conduct its business as described in the Prospectus; and each subsidiary of the Company is duly qualified to do business as a foreign limited liability company in good standing in all other jurisdictions in which its ownership or lease of property or the conduct of its business requires such qualification, except where the failure to be so qualified or in good standing would not, individually or in the aggregate, have a Material

Adverse Effect; all of the issued and outstanding membership interests of each subsidiary of the Company have been duly authorized and validly issued in accordance with the certificate of formation and limited liability company agreement of each such limited liability company and are fully paid (to the extent required under the applicable limited liability company’s certificate of formation and limited liability company agreement) and nonassessable (except as such nonassessability may be affected by Section 18-607 of the Delaware Limited Liability Company Act (the “Delaware LLC Act”)); and the membership interests of each subsidiary owned by the Company, directly or through subsidiaries, are owned free from liens, encumbrances and defects, except to the extent such membership interests are subject to a lien or encumbrance in connection with the Credit Agreement dated as of June 30, 2005 (the “Credit Agreement”) among the Company, as borrower, Comerica Bank, as administrative agent, Citicorp North America, Inc., as syndication agent, Credit Suisse, Cayman Islands Branch, as documentation agent, and the lenders party thereto.

(v) The Offered Securities and all other outstanding shares of capital stock of the Company have been duly authorized; all outstanding shares of capital stock of the Company are, and, when the Offered Securities to be sold by the Company have been delivered and paid for in accordance with this Agreement on the First Closing Date, such Offered Securities will be, validly issued, fully paid and nonassessable and conform in all material respects to the description thereof contained in the Prospectus; and the stockholders of the Company have no preemptive rights with respect to the Securities.

(vi) Except as disclosed in the Prospectus, there are no contracts, agreements or understandings between the Company and any person that would give rise to a valid claim against the Company or any Underwriter for a brokerage commission, finder’s fee or other like payment in connection with this offering.

(vii) Except as disclosed in the Prospectus, there are no contracts, agreements or understandings between the Company and any person granting such person the right to require the Company to file a registration statement under the Act with respect to any securities of the Company owned or to be owned by such person or to require the Company to include such securities in the securities registered pursuant to a Registration Statement or in any securities being registered pursuant to any other registration statement filed by the Company under the Act that have not been validly waived or satisfied prior to the date hereof.

(viii) The Securities have been approved for listing subject to notice of issuance on the Nasdaq Stock Market’s National Market.

(ix) No consent, approval, authorization, or order of, or filing with, any governmental agency or body or any court is required to be obtained or made by the Company for the consummation of the transactions contemplated by this Agreement in connection with the Conversion and sale of the Offered Securities, except (1) such as have been obtained and made under the Act (provided, however, a filing with the Commission pursuant to Rule 424(b) may be made after the date hereof so long as such filing is made within the time period specified in the applicable provision of such rule), (2) such as may be required under state securities laws and (3) the filing of a certificate of conversion and a certificate of incorporation with the Secretary of State of the State of Delaware to effect the Conversion prior to the First Closing Date.

(x) The execution, delivery and performance of this Agreement by the Company, and the consummation of the transactions herein contemplated as well as the consummation of the Conversion will not result in a breach or violation of any of the terms and provisions of, or constitute a default under, any statute, any rule, regulation or order of any governmental agency or body or any court, domestic or foreign, having jurisdiction over the Company or any subsidiary of the Company or any

of their properties, other than such breaches, violations or defaults that would not, individually or in the aggregate, have a Material Adverse Effect.

(xi) The execution, delivery and performance of this Agreement, and the consummation of the transactions herein contemplated as well as the consummation of the Conversion will not result in a breach or violation of any of the terms and provisions of, or constitute a default under, (1) any agreement or instrument to which the Company or any such subsidiary is a party or by which the Company or any such subsidiary is bound or to which any of the properties of the Company or any such subsidiary is subject, or (2) the organizational documents of the Company or any such subsidiary, other than in the case of clause (1), such breaches, violations or defaults that would not, individually or in the aggregate, have a Material Adverse Effect.

(xii) This Agreement has been duly authorized, executed and delivered by the Company.

(xiii) Except as disclosed in the Prospectus, the Company and its subsidiaries (1) have good and marketable title to all real properties and all other properties and assets owned by them, in each case free from liens, encumbrances and defects that would affect the value thereof or interfere with the use made or to be made thereof by them and, (2) hold any leased real or personal property under valid and enforceable leases with no exceptions that would interfere with the use made or to be made thereof by them, except, in each case, for such liens, encumbrances, defects or exceptions that would not have a Material Adverse Effect.

(xiv) The Company and its subsidiaries possess adequate certificates, authorities or permits issued by appropriate governmental agencies or bodies necessary to conduct the business now operated by them, except where the lack thereof would not, individually or in the aggregate, have a Material Adverse Effect, and have not received any notice of proceedings relating to the revocation or modification of any such certificate, authority or permit that, if determined adversely to the Company or any of its subsidiaries, would individually or in the aggregate have a Material Adverse Effect.

(xv) No labor dispute with the employees of the Company or any subsidiary exists or, to the knowledge of the Company, is imminent that would have a Material Adverse Effect.

(xvi) The Company and its subsidiaries own, possess, license or can acquire on reasonable terms, adequate trademarks, trade names and other rights to inventions, know-how, patents, copyrights, confidential information and other intellectual property (collectively, “intellectual property rights”) necessary to conduct the business now operated by them, or presently employed by them, except where the lack thereof would not, individually or in the aggregate, have a Material Adverse Effect, and have not received any notice of infringement of or conflict with asserted rights of others with respect to any intellectual property rights that, if determined adversely to the Company or any of its subsidiaries, would individually or in the aggregate have a Material Adverse Effect.

(xvii) Except as disclosed in the Prospectus, neither the Company nor any of its subsidiaries is in violation of any statute, rule, regulation, decision or order of any governmental agency or body or any court, domestic or foreign, relating to the use, disposal or release of hazardous or toxic substances or relating to the protection or restoration of the environment or human exposure to hazardous or toxic substances (collectively, “environmental laws”), owns or operates any real property contaminated with any substance that is subject to any environmental laws, is liable for any off-site disposal or contamination pursuant to any environmental laws, or is subject to any claim relating to any environmental laws, which violation, contamination, liability or claim would individually or in the aggregate have Material Adverse Effect; and the Company is not aware of any pending investigation which might lead to such a claim.

(xviii) Except as disclosed in the Prospectus, there are no pending actions, suits or proceedings against or, to the Company’s knowledge, affecting the Company, any of its subsidiaries or any of their respective properties that, if determined adversely to the Company or any of its subsidiaries, would individually or in the aggregate have a Material Adverse Effect, or would materially and adversely affect the ability of the Company to perform its obligations under this Agreement, or which are otherwise material in the context of the sale of the Offered Securities; and no such actions, suits or proceedings are threatened or, to the Company’s knowledge, contemplated.

(xix) The financial statements included in each Registration Statement and the Prospectus present fairly the financial position of the Company and its consolidated subsidiaries as of the dates shown and their results of operations and cash flows for the periods shown, and such financial statements have been prepared in conformity with the generally accepted accounting principles in the United States (“GAAP”) applied on a consistent basis; and the schedules included in each Registration Statement present fairly the information required to be stated therein.

(xx) Except as disclosed in the Prospectus, since the date of the latest audited financial statements included in the Prospectus there has been no material adverse change, nor any development or event involving a prospective material adverse change, in the condition (financial or other), business, properties or results of operations of the Company and its subsidiaries taken as a whole, and, except as disclosed in or contemplated by the Prospectus, there has been no dividend or distribution of any kind declared, paid or made by the Company on any class of its capital stock.

(xxi) The Company and its subsidiaries maintain systems of internal accounting controls sufficient to provide reasonable assurance that (i) transactions are executed in accordance with management’s general or specific authorizations; (ii) transactions are recorded as necessary to permit preparation of financial statements in conformity with GAAP and to maintain asset accountability; (iii) access to assets is permitted only in accordance with management’s general or specific authorization; and (iv) the recorded accountability for assets is compared with the existing assets at reasonable intervals and appropriate action is taken with respect to any differences.

(xxii) The Company is not and, after giving effect to the offering and sale of the Offered Securities and the application of the proceeds thereof as described in the Prospectus, will not be an “investment company” as defined in the Investment Company Act of 1940.

(xxiii) The Registration Statement, the Prospectus and any preliminary prospectus comply, and any further amendments or supplements thereto will comply, in all material respects, with any applicable laws or regulations of foreign jurisdictions in which the Prospectus or any preliminary prospectus, as amended or supplemented, if applicable, are distributed at the request of the Company in connection with the Directed Share Program, and no authorization, approval, consent, license, order, registration or qualification of or with any government, governmental instrumentality or court, other than such as have been obtained, is necessary under the securities law and regulations of such foreign jurisdictions in which the Directed Shares are offered outside the United States.

(xxiv) The Company has not offered, or caused the Underwriters to offer, any Offered Securities to any person pursuant to the Directed Share Program with the specific intent to unlawfully influence (i) a customer or supplier of the Company to alter the customer’s or supplier’s level or type of business with the Company or (ii) a trade journalist or publication to write or publish favorable information about the Company or its products.

(xxv) All documents necessary to effect the Conversion in accordance with the Delaware LLC Act and the Delaware General Corporation Law (the “DGCL”) have been, or will be on or prior to the First Closing Date, duly and validly authorized, executed, delivered and, if required, filed with the Delaware Secretary of State and conform or will conform to the requirements of applicable law. On or prior to the First Closing Date, (i) the Conversion will have become effective under the DGCL and the Delaware LLC Act, and the Conversion will have been legally sufficient under the DGCL and the Delaware LLC Act to vest in Hercules Offshore, Inc. immediately following the effective time of the Conversion, all right, title and interest in all of the properties of Hercules Offshore, LLC immediately prior to such effective time and (ii) the Company will be a Delaware corporation named Hercules Offshore, Inc.

(b) Each Selling Stockholder severally represents and warrants to, and agrees with, the several Underwriters that:

(i) Such Selling Stockholder will have on each Closing Date hereinafter mentioned valid and unencumbered title to the Offered Securities to be delivered by such Selling Stockholder on such Closing Date and full right, power and authority to enter into this Agreement and to sell, assign, transfer and deliver the Offered Securities to be delivered by such Selling Stockholder on such Closing Date hereunder; and upon the delivery of and payment for the Offered Securities on each Closing Date hereunder the several Underwriters will acquire valid and unencumbered title to the Offered Securities to be delivered by such Selling Stockholder on such Closing Date.

(ii) If the Effective Time of the Initial Registration Statement is prior to the execution and delivery of this Agreement: (A) on the Effective Date of the Initial Registration Statement, the Initial Registration Statement conformed in all respects to the requirements of the Act and the Rules and Regulations and did not include any untrue statement of a material fact or omit to state any material fact required to be stated therein or necessary to make the statements therein not misleading, (B) on the Effective Date of the Additional Registration Statement (if any), each Registration Statement conformed, or will conform, in all respects to the requirements of the Act and the Rules and Regulations and did not include, or will not include, any untrue statement of a material fact and did not omit, or will not omit, to state any material fact required to be stated therein or necessary to make the statements therein not misleading, and (C) on the date of this Agreement, the Initial Registration Statement and, if the Effective Time of the Additional Registration Statement is prior to the execution and delivery of this Agreement, the Additional Registration Statement each conforms, and at the time of filing of the Prospectus pursuant to Rule 424(b) or (if no such filing is required) at the Effective Date of the Additional Registration Statement in which the Prospectus is included, each Registration Statement and the Prospectus will conform, in all respects to the requirements of the Act and the Rules and Regulations, and neither of such documents includes, or will include, any untrue statement of a material fact or omits, or will omit, to state any material fact required to be stated therein or necessary to make the statements therein not misleading. If the Effective Time of the Initial Registration Statement is subsequent to the execution and delivery of this Agreement: on the Effective Date of the Initial Registration Statement, the Initial Registration Statement and the Prospectus will conform in all respects to the requirements of the Act and the Rules and Regulations, neither of such documents will include any untrue statement of a material fact or will omit to state any material fact required to be stated therein or necessary to make the statements therein not misleading. Each Selling Stockholder makes the representations contained in the two preceding sentences only to the extent that any statements in or omissions from a Registration Statement or the Prospectus are based on written information furnished to the Company by such Selling Stockholder specifically for use therein.

(iii) Except as disclosed in the Prospectus, there are no contracts, agreements or understandings between such Selling Stockholder and any person that would give rise to a valid claim against such

Selling Stockholder or any Underwriter for a brokerage commission, finder’s fee or other like payment in connection with this offering.

(iv) Such Selling Stockholder has no reason to believe that the representations and warranties of the Company contained in this Section 2 are not true and correct, is familiar with the Registration Statement and has no knowledge of any material fact, condition or information not disclosed in the Prospectus or any supplement thereto which has adversely affected or may adversely affect the business of the Company or any of its subsidiaries; and the sale of Securities by such Selling Stockholder pursuant hereto is not prompted by any information concerning the Company or any of its subsidiaries which is not set forth in the Prospectus or any supplement thereto.

(v) No consent, approval, authorization, or order of, or filing with, any governmental agency or body or any court is required to be obtained or made by such Selling Stockholder for the consummation of the transactions contemplated by this Agreement in connection with the Conversion and the sale of the Offered Securities sold by such Selling Stockholder, except such as have been obtained and made under the Act and such as may be required under state securities laws.

(vi) The execution, delivery and performance of this Agreement and the consummation of the transactions herein contemplated will not result in a breach or violation of any of the terms and provisions of, or constitute a default under, any statute, any rule, regulation or order of any governmental agency or body or any court having jurisdiction over any Selling Stockholder or any of their properties or any agreement or instrument to which any Selling Stockholder is a party or by which any Selling Stockholder is bound or to which any of the properties of any Selling Stockholder is subject, or the charter or by-laws of any Selling Stockholder which is a corporation.

(vii) Such Selling Stockholder is a “U.S. Citizen,” as such term is defined in the form of Certificate of Incorporation of the Company filed as an exhibit to the Registration Statement, other than ▇▇▇▇▇▇▇▇▇ Capital Partners (Cayman), L.P. (“Greenhill Cayman”).

(viii) This Agreement has been duly authorized, executed and delivered by each Selling Stockholder.

3. Purchase, Sale and Delivery of Offered Securities. On the basis of the representations, warranties and agreements herein contained, but subject to the terms and conditions herein set forth, the Company and each Selling Stockholder agree, severally and not jointly, to sell to each Underwriter, and each Underwriter agrees, severally and not jointly, to purchase from the Company and each Selling Stockholder, at a purchase price of $ 20.00 per share, that number of Firm Securities (rounded up or down, as determined by Credit Suisse First Boston LLC (“CSFB”) and Citigroup Global Markets Inc. (“Citigroup”) in its discretion, in order to avoid fractional shares) obtained by multiplying 6,250,000 Firm Securities in the case of the Company and the number of Firm Securities set forth opposite the name of such Selling Stockholder in Schedule A hereto, in the case of a Selling Stockholder, in each case by a fraction the numerator of which is the number of Firm Securities set forth opposite the name of such Underwriter in Schedule B hereto and the denominator of which is the total number of Firm Securities.

The Company and the Selling Stockholders will deliver the Firm Securities to the Representatives for the accounts of the Underwriters, against payment of the purchase price in Federal (same day) funds by official bank check or checks or wire transfer to an account at a bank acceptable to the Representatives drawn to the order of the Company in the case of the Firm Securities to be issued and sold by the Company and to the order of American Stock Transfer & Trust Company, as custodian for the Selling Stockholders, in the case of the Firm Securities to be sold by the Selling Stockholders, at the office of ▇▇▇▇▇ ▇▇▇▇▇ L.L.P., ▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇▇ ▇▇▇▇▇, ▇▇▇▇▇▇▇, ▇▇▇▇▇ ▇▇▇▇▇ , at 9:00 A.M., Houston, Texas time, on November 1, 2005, or

at such other time not later than seven full business days thereafter as the Representatives and the Company determine, such time being herein referred to as the “First Closing Date”. For purposes of Rule 15c6-1 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”) the First Closing Date (if later than the otherwise applicable settlement date) shall be the settlement date for payment of funds and delivery of securities for all the Offered Securities sold pursuant to the offering. Any certificates for the Firm Securities so to be delivered will be in definitive form, in such denominations and registered in such names as the Representatives request and will be made available for inspection by the Representatives at the above office of ▇▇▇▇▇ ▇▇▇▇▇ L.L.P. at least 24 hours prior to the First Closing Date.

In addition, upon written notice from the Representatives given to the Company and the Selling Stockholders from time to time not more than 30 days subsequent to the date of the Prospectus, the Underwriters may purchase all or less than all of the Optional Securities at the purchase price per Security to be paid for the Firm Securities. Each Selling Stockholder agrees, severally and not jointly, to sell to the Underwriters the respective numbers of Optional Securities obtained by multiplying the number of Optional Securities specified in such notice by a fraction the numerator of which is the number of Optional Securities set forth opposite the names of such Selling Stockholder in Schedule A hereto under the caption “Number of Optional Securities to be Sold” and the denominator of which is the total number of Optional Securities so set forth opposite the names of all Selling Stockholders (subject to adjustment by CSFB and Citigroup to eliminate fractional shares). Such Optional Securities shall be purchased from each Selling Stockholder for the account of each Underwriter in the same proportion as the number of Firm Securities set forth opposite such Underwriter’s name bears to the total number of Firm Securities (subject to adjustment by CSFB and Citigroup to eliminate fractional shares) and may be purchased by the Underwriters only for the purpose of covering over-allotments made in connection with the sale of the Firm Securities. No Optional Securities shall be sold or delivered unless the Firm Securities previously have been, or simultaneously are, sold and delivered. The right to purchase the Optional Securities or any portion thereof may be exercised from time to time and to the extent not previously exercised may be surrendered and terminated at any time upon notice by the Representatives to the Company and the Selling Stockholders.

Each time for the delivery of and payment for the Optional Securities, being herein referred to as an “Optional Closing Date”, which may be the First Closing Date (the First Closing Date and each Optional Closing Date, if any, being sometimes referred to as a “Closing Date”), shall be determined by the Representatives but shall be not later than five full business days after written notice of election to purchase Optional Securities is given. The Selling Stockholders will deliver the Optional Securities being purchased on each Optional Closing Date to the Representatives for the accounts of the several Underwriters, against payment of the purchase price therefor in Federal (same day) funds by official bank check or checks or wire transfer to an account at a bank acceptable to the Representatives drawn to the order of American Stock Transfer & Trust Company, as custodian for the Selling Stockholders, at the above office of ▇▇▇▇▇ ▇▇▇▇▇ L.L.P. Any certificates for the Optional Securities being purchased on each Optional Closing Date will be in definitive form, in such denominations and registered in such names as the Representatives request upon reasonable notice prior to such Optional Closing Date and will be made available for inspection by the Representatives at the above office of ▇▇▇▇▇ ▇▇▇▇▇ L.L.P. at a reasonable time in advance of such Optional Closing Date.

4. Offering by Underwriters. It is understood that the several Underwriters propose to offer the Offered Securities for sale to the public as set forth in the Prospectus.

5. Certain Agreements of the Company and the Selling Stockholders. The Company agrees with the several Underwriters and the Selling Stockholders that:

(a) If the Effective Time of the Initial Registration Statement is prior to the execution and delivery of this Agreement, the Company will file the Prospectus with the Commission pursuant to and in accordance with subparagraph (1) (or, if applicable and if consented to by the Representatives (which shall not be unreasonably withheld), subparagraph (4)) of Rule 424(b) not later than the earlier

of (A) the second business day following the execution and delivery of this Agreement or (B) the fifteenth business day after the Effective Date of the Initial Registration Statement.

The Company will advise the Representatives promptly of any such filing pursuant to Rule 424(b). If the Effective Time of the Initial Registration Statement is prior to the execution and delivery of this Agreement and an additional registration statement is necessary to register a portion of the Offered Securities under the Act but the Effective Time thereof has not occurred as of such execution and delivery, the Company will file the additional registration statement or, if filed, will file a post-effective amendment thereto with the Commission pursuant to and in accordance with Rule 462(b) on or prior to 10:00 P.M., New York time, on the date of this Agreement or, if earlier, on or prior to the time the Prospectus is printed and distributed to any Underwriter, or will make such filing at such later date as shall have been consented to by the Representatives.

(b) The Company will advise the Representatives promptly of any proposal to amend or supplement the initial or any additional registration statement as filed or the related prospectus or the Initial Registration Statement, the Additional Registration Statement (if any) or the Prospectus and will not effect such amendment or supplementation without the Representatives’ consent; and the Company will also advise the Representatives promptly of the effectiveness of each Registration Statement (if its Effective Time is subsequent to the execution and delivery of this Agreement) and of any amendment or supplementation of a Registration Statement or the Prospectus and of the institution by the Commission of any stop order proceedings in respect of a Registration Statement and will use its reasonable best efforts to prevent the issuance of any such stop order and to obtain as soon as possible its lifting, if issued.

(c) If, at any time when a prospectus relating to the Offered Securities is required to be delivered under the Act in connection with sales by any Underwriter or dealer, any event occurs as a result of which the Prospectus as then amended or supplemented would include an untrue statement of a material fact or omit to state any material fact necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading, or if it is necessary at any time to amend the Prospectus to comply with the Act, the Company will promptly notify the Representatives of such event and will promptly prepare and file with the Commission, at its own expense, an amendment or supplement which will correct such statement or omission or an amendment which will effect such compliance. Neither the Representatives’ consent to, nor the Underwriters’ delivery of, any such amendment or supplement shall constitute a waiver of any of the conditions set forth in Section 6.

(d) As soon as practicable, but not later than the Availability Date (as defined below), the Company will make generally available to its securityholders an earnings statement covering a period of at least 12 months beginning after the Effective Date of the Initial Registration Statement (or, if later, the Effective Date of the Additional Registration Statement) which will satisfy the provisions of Section 11(a) of the Act. For the purpose of the preceding sentence, “Availability Date” means the 45th day after the end of the fourth fiscal quarter following the fiscal quarter that includes such Effective Date, except that, if such fourth fiscal quarter is the last quarter of the Company’s fiscal year, “Availability Date” means the 90th day after the end of such fourth fiscal quarter.

(e) The Company will furnish to the Representatives copies of each Registration Statement (one of which will be signed and will include all exhibits), each related preliminary prospectus, and, so long as a prospectus relating to the Offered Securities is required to be delivered under the Act in connection with sales by any Underwriter or dealer, the Prospectus and all amendments and supplements to such documents, in each case in such quantities as the Representatives reasonably request. The Prospectus shall be so furnished on or prior to 3:00 P.M., New York time, on the second business day following the later of the execution and delivery of this Agreement or the Effective Time

of the Initial Registration Statement. All other such documents shall be so furnished as soon as available. The Company will pay the expenses of printing and distributing to the Underwriters all such documents.

(f) The Company will arrange for the qualification of the Offered Securities for sale under the laws of such jurisdictions as the Representatives designate and will continue such qualifications in effect so long as required for the distribution of the Offered Securities; provided that, in connection therewith, the Company shall not be required to qualify as a foreign corporation or to file a general consent to service of process in any jurisdiction or to subject itself to taxation in respect of doing business in any jurisdiction in which it is not otherwise so subject.

(g) During the period of five years hereafter, the Company will furnish or make available to the Representatives and, upon request, to each of the other Underwriters, as soon as practicable after the end of each fiscal year, a copy of its annual report to stockholders for such year; and the Company will furnish or make available to the Representatives as soon as available, a copy of each report and any definitive proxy statement of the Company filed with the Commission under the Exchange Act or mailed to stockholders.

(h) For the period specified below (the “Lock-Up Period”), the Company will not offer, sell, contract to sell, pledge or otherwise dispose of, directly or indirectly, or file with the Commission a registration statement under the Act (other than a registration statement on Form S-8 or any successor form in connection with the registration of securities pursuant to the Company’s 2004 Long-Term Incentive Plan (the “Plan”)) relating to, any additional shares of its Securities or securities convertible into or exchangeable or exercisable for any shares of its Securities, or publicly disclose the intention to make any such offer, sale, pledge, disposition or filing, without the prior written consent of CSFB and Citigroup, except with respect to Securities issued or issuable pursuant to stock options outstanding on the date hereof and Securities and other stock-based awards issued or issuable pursuant to the terms of the Plan. The initial Lock-Up Period will commence on the date hereof and will continue and include the date 180 days after the date hereof or such earlier date that CSFB and Citigroup consent to in writing; provided, however, that if (1) during the last 17 days of the initial Lock-Up Period, the Company releases earnings results or material news or a material event relating to the Company occurs or (2) prior to the expiration of the initial Lock-Up period, the Company announces that it will release earnings results during the 16-day period beginning on the last day of the initial Lock-Up Period, then in each case the Lock-Up Period will be extended until the expiration of the 18-day period beginning on the date of release of the earnings results or the occurrence of the material news or material event, as applicable, unless CSFB and Citigroup waive, in writing, such extension. The Company will provide the Representatives with notice of any announcement described in clause (2) of the preceding sentence that gives rise to an extension of the Lock-up Period.

(i) The Company agrees with the several Underwriters that the Company will pay all expenses incident to the performance of its obligations under this Agreement, for any filing fees and other expenses (including fees and disbursements of counsel) in connection with qualification of the Offered Securities for sale under the laws of such jurisdictions as the Representatives pursuant to Section 5(f) designate and the printing of memoranda relating thereto, for the filing fee incident to the review by the National Association of Securities Dealers, Inc. of the Offered Securities, for any travel expenses of the Company’s officers and employees and any other expenses of the Company in connection with attending or hosting meetings with prospective purchasers of the Offered Securities, including the cost of any aircraft chartered in connection with attending or hosting such meetings, for expenses incurred in distributing preliminary prospectuses and the Prospectus (including any amendments and supplements thereto) to the Underwriters and for the fees, charges and disbursements of one firm of counsel to all of the Selling Stockholders incurred in connection with this Agreement and the transactions contemplated hereby. Each Selling Stockholder agrees

with the several Underwriters that such Selling Stockholder will pay all expenses incident to the performance of the obligations of such Selling Stockholder under this Agreement which are not specifically provided for in this Section and for any transfer taxes on the sale by the Selling Stockholders of the Offered Securities to the Underwriters. The provisions of this Section shall not affect any agreement that the Company and the Selling Stockholders have made or may make for the sharing of costs and expenses incurred in connection with this Agreement and the transactions contemplated hereby.

(j) Each Selling Stockholder agrees during the Lock-Up Period not to offer, sell, contract to sell, pledge or otherwise dispose of, directly or indirectly, any additional shares of the Securities of the Company or securities convertible into or exchangeable or exercisable for any shares of Securities, enter into a transaction which would have the same effect, or enter into any swap, hedge or other arrangement that transfers, in whole or in part, any of the economic consequences of ownership of the Securities, whether any such aforementioned transaction is to be settled by delivery of the Securities or such other securities, in cash or otherwise, or publicly disclose the intention to make any such offer, sale, pledge or disposition, or enter into any such transaction, swap, hedge or other arrangement, without, in each case, the prior written consent of CSFB and Citigroup. The initial Lock-Up Period will commence on the date hereof and will continue and include the date 180 days after the date hereof or such earlier date that CSFB and Citigroup consent to in writing; provided, however, that if (1) during the last 17 days of the initial Lock-Up Period, the Company releases earnings results or material news or a material event relating to the Company occurs or (2) prior to the expiration of the initial Lock-up Period, the company announces that it will release earnings results during the 16-day period beginning on the last day of the initial Lock-Up Period, then in each case the Lock-Up Period will be extended until the expiration of the 18 day period beginning on the date of release of the earnings results or the occurrence of the material news or material event, as applicable, unless CSFB and Citigroup waive, in writing, such extension.

(k) The Company will pay all fees and disbursements of counsel incurred by the Underwriters in connection with the Directed Share Program and stamp duties, similar taxes or duties or other taxes, if any, incurred by the Underwriters in connection with the Directed Share Program. Furthermore, the Company covenants with the Underwriters that the Company will comply with all applicable securities and other applicable laws, rules and regulations in each foreign jurisdiction in which the Directed Shares are offered, at the request of the Company, in connection with the Directed Share Program.

(l) Each Selling Stockholder hereby agrees to the total number of Offered Securities to be sold by the Selling Stockholders pursuant to this Agreement and to the allocation to and among the Selling Stockholders, and each of them, of such Offered Securities pursuant to this Agreement (as set forth on Schedule A hereto) for purposes of Section 14.2(d) of the Amended and Restated Operating Agreement of the Company dated as of October 1, 2004, as amended, and Section 2.2(d) of the Registration Rights Agreement, dated as of July 7, 2005, among the Company and the holders listed on the signature pages thereto.

6. Conditions of the Obligations of the Underwriters. The obligations of the several Underwriters to purchase and pay for the Firm Securities on the First Closing Date and the Optional Securities to be purchased on each Optional Closing Date will be subject to the accuracy of the representations and warranties on the part of the Company and the Selling Stockholders herein, to the accuracy of the statements of Company officers made pursuant to the provisions hereof, to the performance by the Company and the Selling Stockholders of their obligations hereunder and to the following additional conditions precedent:

(a) The Representatives shall have received a letter, dated the date of delivery thereof (which, if the Effective Time of the Initial Registration Statement is prior to the execution and delivery of this Agreement, shall be on or prior to the date of this Agreement or, if the Effective Time of the Initial Registration Statement is subsequent to the execution and delivery of this Agreement, shall be prior to the filing of the amendment or post-effective amendment to the registration statement to be filed shortly prior to such Effective Time), of ▇▇▇▇▇ ▇▇▇▇▇▇▇▇, LLP confirming that they are independent public accountants within the meaning of the Act and the applicable published Rules and Regulations thereunder and stating to the effect that:

(i) in their opinion the financial statements and schedules examined by them and included in the Registration Statements comply as to form in all material respects with the applicable accounting requirements of the Act and the related published Rules and Regulations;

(ii) they have performed the procedures specified by the American Institute of Certified Public Accountants for a review of interim financial information as described in Statement of Auditing Standards No. 100, Interim Financial Information, on the unaudited financial statements included in the Registration Statements;

(iii) on the basis of the review referred to in clause (ii) above, a reading of the latest available interim financial statements of the Company, inquiries of officials of the Company who have responsibility for financial and accounting matters and other specified procedures, nothing came to their attention that caused them to believe that:

(A) the unaudited financial statements included in the Registration Statements do not comply as to form in all material respects with the applicable accounting requirements of the Act and the related published Rules and Regulations or any material modifications should be made to such unaudited financial statements for them to be in conformity with GAAP;

(B) at the date of the latest available balance sheet read by such accountants, or at a subsequent specified date not more than three business days prior to the date of this Agreement, there was any change in the capital stock or any increase in short-term indebtedness or long-term debt of the Company and its consolidated subsidiaries or, at the date of the latest available balance sheet read by such accountants, there was any decrease in consolidated net assets, as compared with amounts shown on the latest balance sheet included in the Prospectus; or

(C) for the period from the closing date of the latest income statement included in the Prospectus to the closing date of the latest available income statement read by such accountants there were any decreases, as compared with the period of corresponding length ended the date of the latest income statement included in the Prospectus, in consolidated revenues or in the total or per share amounts of net income;

except in all cases set forth in clauses (B) and (C) above for changes, increases or decreases which the Prospectus discloses have occurred or may occur or which are described in such letter; and

(iv) they have compared specified dollar amounts (or percentages derived from such dollar amounts) and other financial information contained in the Registration Statements (in each case to the extent that such dollar amounts, percentages and other

financial information are derived from the general accounting records of the Company and its subsidiaries subject to the internal controls of the Company’s accounting system or are derived directly from such records by analysis or computation) with the results obtained from inquiries, a reading of such general accounting records and other procedures specified in such letter and have found such dollar amounts, percentages and other financial information to be in agreement with such results, except as otherwise specified in such letter.

For purposes of this subsection, (i) if the Effective Time of the Initial Registration Statements is subsequent to the execution and delivery of this Agreement, “Registration Statements” shall mean the initial registration statement as proposed to be amended by the amendment or post-effective amendment to be filed shortly prior to its Effective Time, (ii) if the Effective Time of the Initial Registration Statements is prior to the execution and delivery of this Agreement but the Effective Time of the Additional Registration Statement is subsequent to such execution and delivery, “Registration Statements” shall mean the Initial Registration Statement and the additional registration statement as proposed to be filed or as proposed to be amended by the post-effective amendment to be filed shortly prior to its Effective Time, and (iii) “Prospectus” shall mean the prospectus included in the Registration Statements.

(b) If the Effective Time of the Initial Registration Statement is not prior to the execution and delivery of this Agreement, such Effective Time shall have occurred not later than 10:00 P.M., New York time, on the date of this Agreement or such later date as shall have been consented to by the Representatives. If the Effective Time of the Additional Registration Statement (if any) is not prior to the execution and delivery of this Agreement, such Effective Time shall have occurred not later than 10:00 P.M., New York time, on the date of this Agreement or, if earlier, the time the Prospectus is printed and distributed to any Underwriter, or shall have occurred at such later date as shall have been consented to by the Representatives. If the Effective Time of the Initial Registration Statement is prior to the execution and delivery of this Agreement, the Prospectus shall have been filed with the Commission in accordance with the Rules and Regulations and Section 5(a) of this Agreement. Prior to such Closing Date, no stop order suspending the effectiveness of a Registration Statement shall have been issued and no proceedings for that purpose shall have been instituted or, to the knowledge of any Selling Stockholder, the Company or the Representatives, shall be contemplated by the Commission.

(c) Subsequent to the execution and delivery of this Agreement, there shall not have occurred (i) any change, or any development or event involving a prospective change, in the condition (financial or other), business, properties or results of operations of the Company and its subsidiaries taken as one enterprise which, in the judgment of a majority in interest of the Underwriters including the Representatives, is material and adverse and makes it impractical or inadvisable to proceed with completion of the public offering or the sale of and payment for the Offered Securities; (ii) any downgrading in the rating of any debt securities of the Company by any “nationally recognized statistical rating organization” (as defined for purposes of Rule 436(g) under the Act), or any public announcement that any such organization has under surveillance or review its rating of any debt securities of the Company (other than an announcement with positive implications of a possible upgrading, and no implication of a possible downgrading, of such rating); (iii) any change in U.S. or international financial, political or economic conditions or currency exchange rates or exchange controls as would, in the judgment of a majority in interest of the Underwriters including the Representatives, be likely to prejudice materially the success of the proposed issue, sale or distribution of the Offered Securities, whether in the primary market or in respect of dealings in the secondary market; (iv) any material suspension or material limitation of trading in securities generally on the New York Stock Exchange or Nasdaq National Market, or any setting of minimum prices for trading on such exchange; (v) any suspension of trading of any securities of the Company on any exchange or in the over-the-counter market; (vi) any banking moratorium declared by U.S. Federal or

New York authorities; (vii) any major disruption of settlements of securities or clearance services in the United States or (viii) any attack on, outbreak or escalation of hostilities or act of terrorism involving the United States, any declaration of war by Congress or any other national or international calamity or emergency if, in the judgment of a majority in interest of the Underwriters including the Representatives, the effect of any such attack, outbreak, escalation, act, declaration, calamity or emergency makes it impractical or inadvisable to proceed with completion of the public offering or the sale of and payment for the Offered Securities.

(d) The Representatives shall have received an opinion, dated such Closing Date, of ▇▇▇▇▇ ▇▇▇▇▇ L.L.P., counsel for the Company, to the effect that:

(i) The Company has been duly incorporated and is validly existing in good standing under the laws of the State of Delaware, with corporate power and authority to own its properties and conduct its business as described in the Prospectus; and the Company is duly qualified to do business as a foreign entity in good standing in each of the jurisdictions specified in such opinion;

(ii) Each subsidiary of the Company has been duly organized and is an existing limited liability company in good standing under the laws of the State of Delaware, with limited liability company power and authority to own its properties and conduct its business as described in the Prospectus; and each subsidiary of the Company is duly qualified to do business as a foreign limited liability company in good standing in each of the jurisdictions specified in such opinion; all of the issued and outstanding membership interests of each subsidiary of the Company have been duly authorized and validly issued in accordance with the limited liability company agreement of such subsidiary and the Delaware LLC Act and are fully paid (to the extent required under such limited liability company agreement) and nonassessable (except as such nonassessability may be affected by Section 18-607 of the Delaware LLC Act), and the membership interests of each subsidiary are owned by the Company, directly or through subsidiaries, free from liens, encumbrances or adverse claims (i) in respect of which a financing statement under the Uniform Commercial Code of the State of Delaware naming the Company or one of its subsidiaries as debtor is on file as of a recent date in the office of the Secretary of State of the State of Delaware or (ii) otherwise known to such counsel, without independent investigation, in each case other than liens, encumbrances and adverse claims created by or arising under the Delaware LLC Act, the limited liability company agreement of such subsidiary or the Credit Agreement;

(iii) The Offered Securities delivered on such Closing Date and all other outstanding shares of the Securities of the Company have been duly authorized and validly issued and are fully paid and nonassessable; and the stockholders of the Company have no preemptive rights under the Certificate of Incorporation and Bylaws of the Company, the DGCL or, to the knowledge of such counsel, any other agreement or instrument to which the Company is a party, with respect to the Offered Securities.

(iv) Except as disclosed in the Prospectus, there are no contracts, agreements or understandings known to such counsel between the Company and any person granting such person the right to require the Company to file a registration statement under the Act with respect to any securities of the Company owned or to be owned by such person or to require the Company to include such securities in the securities registered pursuant to the Registration Statement or in any securities being registered pursuant to any other registration statement filed by the Company under the Act that have not been validly waived or satisfied prior to such Closing Date;

(v) The Company is not and, after giving effect to the offering and sale of the Offered Securities and the application of the proceeds therefrom as described in the Prospectus, will not be an “investment company” as defined in the Investment Company Act of 1940.

(vi) No consent, approval, authorization or order of, or filing with, any governmental agency or body or any court is required to be obtained or made by the Company under the DGCL, the Delaware LLC Act, the laws of the State of Texas, the laws of the State of New York and the federal laws of the United States of America for the consummation of the Conversion and the transactions contemplated by this Agreement in connection with the sale of the Offered Securities, except such as have been obtained and made under the Act and except that such counsel need express no opinion in respect of (1) state securities or blue sky laws or (2) federal securities laws of the United States of America in connection with the Conversion;

(vii) The execution, delivery and performance of this Agreement by the Company, the consummation of the Conversion and the issuance and sale of the Offered Securities by the Company, will not result in a breach or violation of any of the terms and provisions of, or constitute a default under, the DGCL, the Delaware LLC Act, the laws of the State of Texas, the laws of the State of New York and the federal laws of the United States of America; provided, however, that such counsel need express no opinion with respect to state securities laws, other federal or state anti-fraud laws, rules or regulations or, with respect to the Conversion, federal securities laws of the United States of America; except for such breaches, violations or defaults which, individually or in the aggregate, would not reasonably be expected to have a Material Adverse Effect or materially impair the ability of the Company to perform its obligations under this Agreement or to consummate the Conversion.

(viii) The execution, delivery and performance of this Agreement, the consummation of the Conversion and the issuance and sale of the Offered Securities will not result in a breach or violation of any of the terms and provisions of, or constitute a default under (A) any agreement or instrument filed as an exhibit to the Registration Statement, or (B) the Certificate of Incorporation or Bylaws of the Company or the certificate of formation and limited liability company operating agreement of any subsidiary of the Company; except for such breaches, violations or defaults referred to in clause (A) above which, individually or in the aggregate, would not reasonably be expected to have a Material Adverse Effect or materially impair the ability of the Company to perform its obligations under this Agreement or to consummate the Conversion.

(ix) The Initial Registration Statement was declared effective under the Act as of the date and time specified in such opinion, the Additional Registration Statement (if any) was filed and became effective under the Act as of the date and time (if determinable) specified in such opinion, the Prospectus either was filed with the Commission pursuant to the subparagraph of Rule 424(b) specified in such opinion on the date specified therein or was included in the Initial Registration Statement or the Additional Registration Statement (as the case may be), and, to the knowledge of such counsel, no stop order suspending the effectiveness of a Registration Statement or any part thereof has been issued and no proceedings for that purpose have been instituted or are pending or contemplated by the Commission, and each Registration Statement and the Prospectus, and each amendment or supplement thereto, in each case other than the financial statements and schedules, the notes thereto and the auditors’ report thereon and other financial and accounting data included therein, or omitted therefrom, as to which such counsel need express no opinion, as of their

respective effective or issue dates, appeared on their face to have complied as to form in all material respects with the requirements of the Act and the Rules and Regulations;

(x) To the knowledge of such counsel (i) there are no legal or governmental proceedings by or before any court or governmental agency, authority or body to which the Company or any of its subsidiaries is a party or to which any of their respective properties is subject of a character required to be described in a Registration Statement or the Prospectus which are not described as required, and (ii) there are no contracts or documents of a character required to be described in a Registration Statement or the Prospectus or to be filed as exhibits to a Registration Statement which are not described or filed as required;

(xi) The section of the Prospectus entitled “Material United States Federal Tax Considerations for Non-U.S. Holders,” insofar as it purports to constitute a summary of United States federal tax law and regulations or legal conclusions with respect thereto, constitutes an accurate summary of the matters described therein in all material respects, subject to the assumptions and qualifications set forth therein; the statements contained in the Prospectus under the caption “Description of Capital Stock,” insofar as they purport to constitute a summary of the Offered Securities, fairly summarize in all material respects the terms of the Offered Securities; and the statements contained in the Prospectus under the captions “Management’s Discussion and Analysis of Financial Condition and Results of Operations-Liquidity and Capital Resources-Liquidity and Financing Arrangements-Debt,” “Business-Regulation,” and “Certain Relationship and Related Party Transactions-Registration Rights Agreement,” insofar as they purport to constitute descriptions of agreements or refer to statements of law or legal conclusions, fairly describe, in all material respects, the agreements and the statutes and regulations addressed thereby;

(xii) This Agreement has been duly authorized, executed and delivered by the Company; and

(xiii) All documents required under the DGCL and the Delaware LLC Act to effect the Conversion have been duly filed with the Secretary of State of the State of Delaware and conform to the requirements of the DGCL and the Delaware LLC Act. The Conversion became effective under the DGCL and the Delaware LLC Act on the date specified in such opinion; and the Conversion was legally sufficient under the DGCL and the Delaware LLC Act to vest in Hercules Offshore, Inc. (as a corporation) immediately following the effective time of the Conversion all right, title and interest in all the properties of Hercules Offshore, LLC (as a limited liability company) immediately prior to such effective time; and the Company is a Delaware corporation named Hercules Offshore, Inc.

Such counsel shall also include, in a separate paragraph of its opinion, statements to the following effect: such counsel has participated in conferences with officers and other representatives of the Company, with representatives of the independent registered public accounting firm of the Company, and with representatives of and counsel for the Underwriters, at which the contents of the Registration Statement and the Prospectus were discussed, and although such counsel did not independently verify such information, and is not passing upon and does not assume any responsibility for, the accuracy, completeness or fairness of the statements contained in the Registration Statement or Prospectus, on the basis of the foregoing, no facts have come to such counsel’s attention that lead such counsel to believe that (A) the Registration Statement (other than the financial statements and schedules, the notes thereto and the auditors’ reports thereon and the other financial and accounting data included therein or omitted therefrom, as to which such counsel has not been asked to comment) as of its effective date or as of the Closing Date included an untrue statement of a material fact or omitted to state a material fact necessary in order to make the

statements therein not misleading, and (B) the Prospectus or any amendments thereto (other than the financial statements and schedules, the notes thereto and the auditors’ reports thereon and the other financial and accounting data included therein or omitted therefrom, as to which such counsel has not been asked to comment) as of its date or as of the Closing Date included an untrue statement of a material fact or omitted to state a material fact necessary in order to make the statements therein, in the light of the circumstances under which they were made, not misleading.

(e) The Representatives shall have received an opinion, dated such Closing Date, of Fulbright & ▇▇▇▇▇▇▇▇ L.L.P., counsel for ▇▇ ▇▇▇▇▇▇▇▇ Holdings, L.P., ▇▇▇▇▇▇▇▇▇ Capital Partners, L.P., Greenhill Capital, L.P., ▇▇▇▇▇▇▇▇▇ Capital Partners (Executives), L.P. and ▇▇▇▇▇▇▇▇▇ Capital Partners (Cayman), L.P. (the “LR/G Selling Stockholders”), to the effect that:

(i) Upon the delivery to DTC or its agent of the certificate or certificates representing the Offered Securities proposed to be sold by the LR/G Selling Stockholders (the “LR/G Shares”), registered in the name of Cede & Co., as nominee for DTC, the crediting by DTC by means of book entry of the LR/G Shares to the securities accounts of the several Underwriters maintained with DTC (the “Securities Accounts”), and the payment of the purchase price for the LR/G Shares pursuant to this Agreement, and assuming that neither DTC nor any Underwriter has notice of any “adverse claim” (within the meaning of Section 8-105 of the NYUCC), each of the Underwriters will acquire a valid “security entitlement” (within the meaning of Section 8-102(a)(17) of the NYUCC) to the LR/G Shares in such Underwriter’s Securities Account, free of any “adverse claim” (within the meaning of Section 8-105 of the NYUCC) to the securities underlying such security entitlement, whether framed in conversion, replevin, constructive trust, equitable lien, or other theory;

(ii) No consent, approval, authorization or order of, or filing with, any governmental agency or body or any court is required to be obtained or made by any LR/G Selling Stockholder for the consummation of the transactions contemplated by this Agreement in connection with the sale of the Offered Securities sold by such LR/G Selling Stockholder, including the Conversion, except such as have been obtained and made under the Act and such as may be required under other federal and state securities laws;

(iii) The execution, delivery and performance of this Agreement, the Power of Attorney dated October 26, 2005 (the “Power of Attorney”) and the Custody Agreement, dated the date of the Power of Attorney (the “Custody Agreement”) and the consummation of the transactions herein and therein contemplated will not result in a breach or violation of any of the terms and provisions of, or constitute a default under, any statute, any rule, regulation or to our knowledge, any order of any governmental agency or body or any court having jurisdiction over any LR/G Selling Stockholder or any of their properties, or the limited partnership agreement of any such LR/G Selling Stockholder;

(iv) The execution, delivery and performance of this Agreement, the Power of Attorney and the Custody Agreement and the consummation of the transactions herein and therein contemplated will not result in a breach or violation of any of the terms and provisions of, or constitute a default under, (A) any agreement or instrument to which any LR/G Selling Stockholder is a party and that has been identified to us by any LR/G Selling Stockholder as being material to such LR/G Selling Stockholder, which agreements shall be listed on an attachment to such opinion, (B) the Management Agreement, dated June 30, 2000, among Greenhill Fund Management Co., LLC, ▇▇▇▇▇▇▇▇▇ Capital Partners, L.P., Greenhill Capital, L.P., ▇▇▇▇▇▇▇▇▇ Capital Partners (Executives), L.P., and ▇▇▇▇▇▇▇▇▇ Capital Partners (Cayman), L.P. or (C) the certificate of formation or agreement of limited

partnership of any LR/G Selling Stockholder other than ▇▇▇▇▇▇▇▇▇ Capital Partners (Cayman), L.P.; and

(v) This Agreement, the Power of Attorney and the Custody Agreement have been duly authorized, executed and delivered by each LR/G Selling Stockholder.

(f) The Representatives shall have received an opinion, dated such Closing Date, of ▇▇▇▇▇▇ and ▇▇▇▇▇▇, counsel for ▇▇▇▇▇▇▇▇▇ Capital Partners (Cayman), L.P., that shall be reasonably acceptable to the Representatives.

(g) The Representatives shall have received an opinion, dated such Closing Date, of ▇▇▇▇▇ ▇▇▇▇▇ L.L.P., counsel for the Company, with respect to ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇, Kestrel Capital, LP, and ▇▇▇▇▇▇ ▇. ▇▇▇▇, that shall be reasonably acceptable to the Representatives.

(h) The Representatives shall have received an opinion, dated such Closing Date, of Akin, Gump, Strauss, ▇▇▇▇▇ & ▇▇▇▇ LLP, counsel for ▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇ ▇▇, that shall be reasonably acceptable to the Representatives.

(i) The Representatives shall have received from ▇▇▇▇▇▇ & ▇▇▇▇▇▇ L.L.P., counsel for the Underwriters, such opinion or opinions, dated such Closing Date, with respect to the organization of the Company, the validity of the Offered Securities delivered on such Closing Date, the Registration Statements, the Prospectus and other related matters as the Representatives may require, and the Selling Stockholders and the Company shall have furnished to such counsel such documents as they request for the purpose of enabling them to pass upon such matters.

(j) The Representatives shall have received a certificate, dated such Closing Date, of the President or any Vice President and a principal financial or accounting officer of the Company in which such officers, to the best of their knowledge after reasonable investigation, shall state that: the representations and warranties of the Company in this Agreement are true and correct; the Company has complied with all agreements and satisfied all conditions on its part to be performed or satisfied hereunder at or prior to such Closing Date; no stop order suspending the effectiveness of any Registration Statement has been issued and no proceedings for that purpose have been instituted or are contemplated by the Commission; the Additional Registration Statement (if any) satisfying the requirements of subparagraphs (1) and (3) of Rule 462(b) was filed pursuant to Rule 462(b), including payment of the applicable filing fee in accordance with Rule 111(a) or (b) under the Act, prior to the time the Prospectus was printed and distributed to any Underwriter; and, subsequent to the date of the most recent financial statements in the Prospectus, there has been no material adverse change, nor any development or event involving a prospective material adverse change, in the condition (financial or other), business, properties or results of operations of the Company and its subsidiaries taken as a whole except as set forth in the Prospectus or as described in such certificate.

(k) The Representatives shall have received a letter, dated such Closing Date, of ▇▇▇▇▇ ▇▇▇▇▇▇▇▇, LLP which meets the requirements of subsection (a) of this Section, except that the specified date referred to in such subsection will be a date not more than three days prior to such Closing Date for the purposes of this subsection.

(l) On or prior to the date of this Agreement, the Representatives shall have received lockup letters from each of the executive officers and directors of the Company who are not Selling Stockholders substantially in the form of Exhibit A.

(m) To avoid a 28% backup withholding tax each Selling Stockholder will deliver to the Representatives a properly completed and executed United States Treasury Department Form W-9 (or other applicable form or statement specified by Treasury Department regulations in lieu thereof).

(n) On or prior to the First Closing Date, the Conversion shall have been duly and validly completed.

(o) The Representatives shall have received a certificate, dated such Closing Date, of each Selling Stockholder and in which such Selling Stockholder, to the best of his or its knowledge after reasonable investigation, shall state that: the representations and warranties of the Selling Stockholder in this Agreement are true and correct; and the Selling Stockholder has complied with all agreements and satisfied all conditions on its part to be performed or satisfied hereunder at or prior to such Closing Date.

(p) The Representatives shall have received certificates of the chief financial officer of the Company and the chief accounting officer or controller of the Company, dated respectively as of the Execution Time and as of the Closing Date, to the effect that (i) the Company has prepared the financial and operating information and estimates set forth under the caption “Third Quarter 2005 Update” in the Prospectus and (ii) as of the date of such certificate, (A) the financial and operating information specifically identified in such certificate agree with or are accurately derived from the appropriate internal accounting and/or financial records of the Company, which are subject to normal quarter-end and audit adjustments, and (B) the estimates specifically identified in such certificate are based on reasonable assumptions, as well as reasonable assumptions with respect to quarter-end adjustments expected to be recorded in connection with the preparation of the Company’s unaudited financial statements for the three-month and nine-month periods ended September 30, 2005.

The Selling Stockholders and the Company will furnish the Representatives with such conformed copies of such opinions, certificates, letters and documents as the Representatives reasonably request. The Representatives may in their sole discretion waive on behalf of the Underwriters compliance with any conditions to the obligations of the Underwriters hereunder, whether in respect of an Optional Closing Date or otherwise.

7. Indemnification and Contribution. (a) The Company will indemnify and hold harmless each Underwriter, its partners, members, directors, officers and its affiliates and each person, if any, who controls such Underwriter within the meaning of Section 15 of the Act, against any losses, claims, damages or liabilities, joint or several, to which such Underwriter may become subject, under the Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon any untrue statement or alleged untrue statement of any material fact contained in any Registration Statement, the Prospectus, or any amendment or supplement thereto, or any related preliminary prospectus, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, and will reimburse each Underwriter for any legal or other expenses reasonably incurred by such Underwriter in connection with investigating or defending any such loss, claim, damage, liability or action as such expenses are incurred; provided, however, that the Company will not be liable in any such case to the extent that any such loss, claim, damage or liability arises out of or is based upon an untrue statement or alleged untrue statement in or omission or alleged omission from any of such documents in reliance upon and in conformity with written information furnished to the Company by any Underwriter through the Representatives specifically for use therein, it being understood and agreed that the only such information furnished by any Underwriter consists of the information described as such in subsection (c) below; and provided, further, that with respect to any untrue statement or alleged untrue statement in or omission or alleged omission from any preliminary prospectus the indemnity agreement contained in this subsection (a) shall not inure to the benefit of any Underwriter from whom the person asserting any such losses,

claims, damages or liabilities purchased the Offered Securities concerned, to the extent that a prospectus relating to such Offered Securities was required to be delivered by such Underwriter under the Act in connection with such purchase and any such loss, claim, damage or liability of such Underwriter results from the fact that there was not sent or given to such person, at or prior to the written confirmation of the sale of such Offered Securities to such person, a copy of the Prospectus if the Company had previously furnished copies thereof to such Underwriter.

The Company agrees to indemnify and hold harmless the Designated Underwriter and each person, if any, who controls the Designated Underwriter within the meaning of either Section 15 of the Act or Section 20 of the Exchange Act (the “Designated Entities”), from and against any and all losses, claims, damages and liabilities (including, without limitation, any legal or other expenses reasonably incurred in connection with defending or investigating any such action or claim) (i) caused by any untrue statement or alleged untrue statement of a material fact contained in any material prepared by or with the consent of the Company for distribution to Participants in connection with the Directed Share Program or caused by any omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading; (ii) caused by the failure of any Participant to pay for and accept delivery of Directed Shares that the Participant agreed to purchase; or (iii) related to, arising out of, or in connection with the Directed Share Program, other than losses, claims, damages or liabilities (or expenses relating thereto) that are finally judicially determined to have resulted from the bad faith or gross negligence of the Designated Entities.

(b) The Selling Stockholders, severally and not jointly, will indemnify and hold harmless each Underwriter, its partners, members, directors, officers and its affiliates and each person, if any, who controls such Underwriter within the meaning of Section 15 of the Act, against any losses, claims, damages or liabilities, joint or several, to which such Underwriter may become subject, under the Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon any untrue statement or alleged untrue statement of any material fact contained in any Registration Statement, the Prospectus, or any amendment or supplement thereto, or any related preliminary prospectus, or arise out of or are based upon the omission or alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, and will reimburse each Underwriter for any legal or other expenses reasonably incurred by such Underwriter in connection with investigating or defending any such loss, claim, damage, liability or action as such expenses are incurred; provided, however, that the Selling Stockholders will not be liable in any such case to the extent that any such loss, claim, damage or liability arises out of or is based upon an untrue statement or alleged untrue statement in or omission or alleged omission from any of such documents in reliance upon and in conformity with written information furnished to the Company by an Underwriter through the Representatives specifically for use therein, it being understood and agreed that the only such information furnished by any Underwriter consists of the information described as such in subsection (c) below; provided, further, that the Selling Stockholders shall only be subject to such liability to the extent that the untrue statement or alleged untrue statement or omission or alleged omission is based upon information provided in writing by such Selling Stockholder specifically for inclusion in such Registration Statement, Prospectus or any amendment or supplement thereto or contained in a representation or warranty given by such Selling Stockholder in this Agreement; provided, however, that with respect to any amount due an indemnified person under this paragraph (b), each Selling Stockholder shall be liable only to the extent of the gross proceeds attributable to such Selling Stockholder from the sale of Securities to the Underwriters.

(c) Each Underwriter will severally and not jointly indemnify and hold harmless the Company, its managers, directors and officers and each person, if any, who controls the Company within the meaning of Section 15 of the Act, each Selling Stockholder, the partners, members, directors and officers of each Selling Stockholder, and each person, if any, who controls such Selling Stockholder within the meaning of Section 15 of the Act against any losses, claims, damages or liabilities to which the Company or such Selling Stockholder may become subject, under the Act or otherwise, insofar as such losses, claims, damages or liabilities (or actions in respect thereof) arise out of or are based upon any untrue statement or alleged untrue statement of

any material fact contained in any Registration Statement, the Prospectus, or any amendment or supplement thereto, or any related preliminary prospectus, or arise out of or are based upon the omission or the alleged omission to state therein a material fact required to be stated therein or necessary to make the statements therein not misleading, in each case to the extent, but only to the extent, that such untrue statement or alleged untrue statement or omission or alleged omission was made in reliance upon and in conformity with written information furnished to the Company by such Underwriter through the Representatives specifically for use therein, and will reimburse any legal or other expenses reasonably incurred by the Company and each Selling Stockholder in connection with investigating or defending any such loss, claim, damage, liability or action as such expenses are incurred, it being understood and agreed that the only such information furnished by any Underwriter consists of the following information in the Prospectus furnished on behalf of each Underwriter: (i) the information contained in the last three sentences in the sixth paragraph under the caption “Shares Eligible for Future Sale,” (ii) the concession and reallowance figures appearing in the fourth paragraph under the caption “Underwriting,” (iii) the information contained in the seventh paragraph under the caption “Underwriting,” (iv) the information contained in the sixteenth paragraph under the caption “Underwriting” related to stabilizing transactions, syndicate covering transactions and penalty bids and (v) the information in the seventeenth paragraph under the caption “Underwriting” related to prospectuses in electronic format and Internet distributions.

(d) Promptly after receipt by an indemnified party under this Section of notice of the commencement of any action, such indemnified party will, if a claim in respect thereof is to be made against an indemnifying party under subsection (a), (b) or (c) above, notify the indemnifying party of the commencement thereof; but the failure to notify the indemnifying party shall not relieve it from any liability that it may have under subsection (a), (b) or (c) above except to the extent that it has been materially prejudiced (through the forfeiture of substantive rights or defenses) by such failure; and provided further that the failure to notify the indemnifying party shall not relieve it from any liability that it may have to an indemnified party otherwise than under subsection (a), (b) or (c) above. In case any such action is brought against any indemnified party and it notifies an indemnifying party of the commencement thereof, the indemnifying party will be entitled to participate therein and, to the extent that it may wish, jointly with any other indemnifying party similarly notified, to assume the defense thereof, with counsel reasonably satisfactory to such indemnified party (who shall not, except with the consent of the indemnified party, be counsel to the indemnifying party), and after notice from the indemnifying party to such indemnified party of its election so to assume the defense thereof, the indemnifying party will not be liable to such indemnified party under this Section for any legal or other expenses subsequently incurred by such indemnified party in connection with the defense thereof other than reasonable costs of investigation. Notwithstanding anything contained herein to the contrary, if indemnity may be sought pursuant to the last paragraph in Section 7(a) hereof in respect of such action or proceeding, then in addition to such separate firm for the indemnified parties, the indemnifying party shall be liable for the reasonable fees and expenses of not more than one separate firm (in addition to any local counsel) for the Designated Underwriter for the defense of any losses, claims, damages and liabilities arising out of the Directed Share Program, and all persons, if any, who control the Designated Underwriter within the meaning of either Section 15 of the Act of Section 20 of the Exchange Act. No indemnifying party shall, without the prior written consent of the indemnified party, effect any settlement of any pending or threatened action in respect of which any indemnified party is or could have been a party and indemnity could have been sought hereunder by such indemnified party unless such settlement (i) includes an unconditional release of such indemnified party from all liability on any claims that are the subject matter of such action and (ii) does not include a statement as to, or an admission of, fault, culpability or a failure to act by or on behalf of an indemnified party.

(e) If the indemnification provided for in this Section is unavailable or insufficient to hold harmless an indemnified party under subsection (a), (b) or (c) above, then each indemnifying party shall contribute to the amount paid or payable by such indemnified party as a result of the losses, claims, damages or liabilities referred to in subsection (a), (b) or (c) above (i) in such proportion as is appropriate to reflect the relative benefits received by the Company and the Selling Stockholders on the one hand and the Underwriters on the

other from the offering of the Securities or (ii) if the allocation provided by clause (i) above is not permitted by applicable law, in such proportion as is appropriate to reflect not only the relative benefits referred to in clause (i) above but also the relative fault of the Company and the Selling Stockholders on the one hand and the Underwriters on the other in connection with the statements or omissions which resulted in such losses, claims, damages or liabilities as well as any other relevant equitable considerations. The relative benefits received by the Company and the Selling Stockholders on the one hand and the Underwriters on the other shall be deemed to be in the same proportion as the total net proceeds from the offering (before deducting expenses) received by the Company and the Selling Stockholders bear to the total underwriting discounts and commissions received by the Underwriters. The relative fault shall be determined by reference to, among other things, whether the untrue or alleged untrue statement of a material fact or the omission or alleged omission to state a material fact relates to information supplied by the Company, the Selling Stockholders or the Underwriters and the parties’ relative intent, knowledge, access to information and opportunity to correct or prevent such untrue statement or omission. The amount paid by an indemnified party as a result of the losses, claims, damages or liabilities referred to in the first sentence of this subsection (e) shall be deemed to include any legal or other expenses reasonably incurred by such indemnified party in connection with investigating or defending any action or claim which is the subject of this subsection (e). Notwithstanding the provisions of this subsection (e), no Underwriter shall be required to contribute any amount in excess of the amount by which the total price at which the Securities underwritten by it and distributed to the public were offered to the public exceeds the amount of any damages which such Underwriter has otherwise been required to pay by reason of such untrue or alleged untrue statement or omission or alleged omission. No person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Act) shall be entitled to contribution from any person who was not guilty of such fraudulent misrepresentation. The Underwriters’ obligations in this subsection (e) to contribute are several in proportion to their respective underwriting obligations and not joint.

(f) The obligations of the Company and the Selling Stockholders under this Section shall be in addition to any liability which the Company and the Selling Stockholders may otherwise have and shall extend, upon the same terms and conditions, to each person, if any, who controls any Underwriter) within the meaning of the Act; and the obligations of the Underwriters under this Section shall be in addition to any liability which the respective Underwriters may otherwise have and shall extend, upon the same terms and conditions, to each director of the Company, to each officer of the Company who has signed a Registration Statement, to each person, if any, who controls the Company within the meaning of the Act, to the partners, members, directors and officers of each Selling Stockholder, and each person, if any, who controls such Selling Stockholder within the meaning of Section 15 of the Act.

8. Default of Underwriters. If any Underwriter or Underwriters default in their obligations to purchase Offered Securities hereunder on either the First Closing Date or any Optional Closing Date and the aggregate number of shares of Offered Securities that such defaulting Underwriter or Underwriters agreed but failed to purchase does not exceed 10% of the total number of shares of Offered Securities that the Underwriters are obligated to purchase on such Closing Date, the Representatives may make arrangements satisfactory to the Company and the Selling Stockholders for the purchase of such Offered Securities by other persons, including any of the Underwriters, but if no such arrangements are made by such Closing Date, the non-defaulting Underwriters shall be obligated severally, in proportion to their respective commitments hereunder, to purchase the Offered Securities that such defaulting Underwriters agreed but failed to purchase on such Closing Date. If any Underwriter or Underwriters so default and the aggregate number of shares of Offered Securities with respect to which such default or defaults occur exceeds 10% of the total number of shares of Offered Securities that the Underwriters are obligated to purchase on such Closing Date and arrangements satisfactory to the Representatives, the Company and the Selling Stockholders for the purchase of such Offered Securities by other persons are not made within 36 hours after such default, this Agreement will terminate without liability on the part of any non-defaulting Underwriter, the Company or the Selling Stockholders, except as provided in Section 9 (provided that if such default occurs with respect to Optional Securities after the First Closing Date, this Agreement will not terminate as to the Firm Securities or any Optional Securities purchased prior to such termination). As used in this Agreement, the term “Underwriter”

includes any person substituted for an Underwriter under this Section. Nothing herein will relieve a defaulting Underwriter from liability for its default.

9. Survival of Certain Representations and Obligations. The respective indemnities, agreements, representations, warranties and other statements of the Selling Stockholders, of the Company or its officers and of the several Underwriters set forth in or made pursuant to this Agreement will remain in full force and effect, regardless of any investigation, or statement as to the results thereof, made by or on behalf of any Underwriter, any Selling Stockholder, the Company or any of their respective representatives, officers or directors or any controlling person, and will survive delivery of and payment for the Offered Securities. If this Agreement is terminated pursuant to Section 8 or if for any reason the purchase of the Offered Securities by the Underwriters is not consummated, the Company and the Selling Stockholders shall remain responsible for the expenses to be paid or reimbursed by them pursuant to Section 5 and the respective obligations of the Company, the Selling Stockholders, and the Underwriters pursuant to Section 7 shall remain in effect, and if any Offered Securities have been purchased hereunder the representations and warranties in Section 2 and all obligations under Section 5 shall also remain in effect. If the purchase of the Offered Securities by the Underwriters is not consummated for any reason other than solely because of the termination of this Agreement pursuant to Section 8 or the occurrence of any event specified in clause (iii), (iv), (vi), (vii) or (viii) of Section 6(c), the Company will reimburse the Underwriters for all out-of-pocket expenses (including fees and disbursements of counsel) reasonably incurred by them in connection with the offering of the Offered Securities.

10. Notices. All communications hereunder will be in writing and, if sent to the Underwriters, will be mailed, delivered or faxed and confirmed to the Representatives at (i) Credit Suisse First Boston Transaction Advisory Group, Eleven Madison Avenue, New York, N.Y. 10010-3629, Attention: Transactions Advisory Group (fax: ▇▇▇-▇▇▇-▇▇▇▇) and (ii) Citigroup Global Markets Inc. General Counsel (fax no.: (▇▇▇) ▇▇▇-▇▇▇▇) and confirmed to the General Counsel, Citigroup Global Markets Inc., at ▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇▇, ▇▇▇ ▇▇▇▇, ▇▇▇ ▇▇▇▇ ▇▇▇▇▇, Attention: General Counsel, or, if sent to the Company, will be mailed, delivered or faxed and confirmed to it at ▇▇ ▇▇▇▇▇▇▇▇ ▇▇▇▇▇, ▇▇▇▇▇ ▇▇▇▇, ▇▇▇▇▇▇▇, ▇▇▇▇▇ ▇▇▇▇▇, Attention: Chief Financial Officer (fax no: (▇▇▇) ▇▇▇-▇▇▇▇), or, if sent to the LR/G Selling Stockholders or any of them, will be mailed, delivered or faxed and confirmed to ▇▇▇▇ ▇▇▇▇▇▇▇▇, ▇▇▇▇▇ ▇▇▇▇, ▇▇▇▇▇▇▇, ▇▇▇▇▇ ▇▇▇▇▇, Attention: ▇▇▇▇▇ ▇▇▇▇▇▇▇▇ (fax no: (▇▇▇) ▇▇▇-▇▇▇▇); provided, however, that any notice to an Underwriter pursuant to Section 7 will be mailed, delivered or faxed and confirmed to such Underwriter.

11. Successors. This Agreement will inure to the benefit of and be binding upon the parties hereto and their respective personal representatives and successors and the officers and directors and controlling persons referred to in Section 7, and no other person will have any right or obligation hereunder.

12. Representation. The Representatives will act for the several Underwriters in connection with the transactions contemplated by this Agreement, and any action under this Agreement taken by the Representatives jointly or by CSFB will be binding upon all the Underwriters.

13. Counterparts. This Agreement may be executed in any number of counterparts, each of which shall be deemed to be an original, but all such counterparts shall together constitute one and the same Agreement.

14. Absence of Fiduciary Relationship. The Company and the Selling Stockholders acknowledge and agree that:

(a) The Representatives have been retained solely to act as underwriters in connection with the sale of the Offered Securities and no fiduciary, advisory or agency relationship between Company or the Selling Stockholders, on the one hand, and the Representatives, on the other, has been created in respect of any of the transactions contemplated by this Agreement, irrespective of whether the Representatives have advised or are advising the Company or the Selling Stockholders on other matters;

(b) the price of the securities set forth in this Agreement was established by the Company and the Selling Stockholders following discussions and arms-length negotiations with the Representatives, and the Company and the Selling Stockholders are capable of evaluating and understanding, and understand and accept, the terms, risks and conditions of the transactions contemplated by this Agreement;

(c) the Company and the Selling Stockholders have been advised that the Representatives and their affiliates are engaged in a broad range of transactions which may involve interests that differ from those of the Company or the Selling Stockholder and that the Representatives have no obligation to disclose such interests and transactions to the Company or the Selling Stockholders by virtue of any fiduciary, advisory or agency relationship; and

(d) the Company and the Selling Stockholders, to the fullest extent permitted by law, waive any claims they may have against the Representatives for breach of fiduciary duty or alleged breach of fiduciary duty with respect to the transactions contemplated by this Agreement and agree that the Representatives shall have no liability (whether direct or indirect) to the Company or the Selling Stockholders in respect of such a fiduciary duty claim or to any person asserting such a fiduciary duty claim on behalf of or in right of Company, including stockholders, employees or creditors of the Company.

15. Applicable Law. This Agreement shall be governed by, and construed in accordance with, the laws of the State of New York, without regard to principles of conflicts of laws.

The Company hereby submits to the non-exclusive jurisdiction of the Federal and state courts in the Borough of Manhattan in The City of New York in any suit or proceeding arising out of or relating to this Agreement or the transactions contemplated hereby.

If the foregoing is in accordance with the Representatives’ understanding of our agreement, kindly sign and return to the Company one of the counterparts hereof, whereupon it will become a binding agreement among the Selling Stockholders, the Company and the several Underwriters in accordance with its terms.


Very truly yours,

HERCULES OFFSHORE, LLC

By		/s/ ▇▇▇▇▇▇ ▇. ▇▇▇▇
		▇▇▇▇▇▇ ▇. ▇▇▇▇
		Chief Financial Officer

The Selling Stockholders named in Schedule A hereto, acting severally

By:		/s/ ▇▇▇▇▇▇ ▇. ▇▇▇▇
		▇▇▇▇▇▇ ▇. ▇▇▇▇
		Attorney-in-fact


The foregoing Underwriting Agreement is hereby confirmed and accepted as of the date first above written.

CREDIT SUISSE FIRST BOSTON LLC

CITIGROUP GLOBAL MARKETS INC.

Acting on behalf of themselves and as the Representatives of the several Underwriters.

By		CREDIT SUISSE FIRST BOSTON LLC

By		/s/ ROME ▇▇▇▇▇▇
		Rome ▇▇▇▇▇▇

By		CITIGROUP GLOBAL MARKETS INC.

By		/s/ ▇▇▇▇▇ ▇▇▇▇▇▇▇
		▇▇▇▇▇ ▇▇▇▇▇▇▇

SCHEDULE A


Selling Stockholder	Number of Firm Securities to be Sold	Number of Optional Securities to be Sold
▇▇ ▇▇▇▇▇▇▇▇ Holdings, LP	1,874,826	877,037
▇▇▇▇▇▇▇▇▇ Capital Partners, L.P.	580,060	271,350
Greenhill Capital, L.P.	185,137	86,606
▇▇▇▇▇▇▇▇▇ Capital Partners (Executives), L.P.	89,303	41,775
▇▇▇▇▇▇▇▇▇ Capital Partners (Cayman), L.P.	82,913	38,787
▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇▇	74,379	34,794
Kestrel Capital, LP	36,605	17,124
▇▇▇▇▇▇ ▇. ▇▇▇▇▇▇ ▇▇	14,304	6,693
▇▇▇▇▇▇ ▇. ▇▇▇▇	12,473	5,834

Total	2,950,000	1,380,000

SCHEDULE B


Underwriter		Number of Firm Securities to be Purchased
Credit Suisse First Boston LLC		3,540,000
Citigroup Global Markets Inc.		3,540,000
▇▇▇▇▇▇▇ & Company International		885,000
Deutsche Bank Securities Inc.		708,000
▇▇▇▇▇▇ ▇▇▇▇ Incorporated		177,000
▇▇▇▇▇▇▇▇▇ & Company, Inc.		100,000
▇▇▇▇▇▇▇▇▇ Energy Partners, Inc.		50,000
▇▇▇▇▇▇▇▇▇ Capital Partners, LLC		50,000
▇▇▇▇▇▇▇ ▇▇▇▇▇▇ ▇▇▇▇▇▇		50,000
Sterne, Agee & ▇▇▇▇▇, Inc.		50,000
▇▇▇▇▇▇, ▇▇▇▇▇▇▇ & Co., Inc.		25,000
CMG Institutional Trading LLC		25,000

Total		9,200,000

Lock-Up Agreement

October , 2005

Hercules Offshore, Inc.

▇▇▇▇ ▇▇▇▇▇▇▇▇▇ ▇▇▇▇▇

▇▇▇▇▇ ▇▇▇

▇▇▇▇▇▇▇, ▇▇▇▇▇ ▇▇▇▇▇

Credit Suisse First Boston LLC

Citigroup Global Markets Inc.

▇▇▇▇▇▇▇ & Company International

Deutsche Bank Securities Inc.

▇▇▇▇▇▇ ▇▇▇▇ Incorporated

c/o	Credit Suisse First Boston LLC

Eleven ▇▇▇▇▇▇▇ ▇▇▇▇▇▇

▇▇▇ ▇▇▇▇, ▇▇ ▇▇▇▇▇-▇▇▇▇

Dear Sirs:

As an inducement to the Underwriters to execute the Underwriting Agreement (the “Underwriting Agreement”) pursuant to which an offering will be made that is intended to result in the establishment of a public market for the common stock, par value $0.01 per share (the “Securities”), of Hercules Offshore, Inc., and any successor (by merger, conversion or otherwise) thereto, (the “Company”), the undersigned hereby agrees that during the period specified in the following paragraph (the “Lock-Up Period”), the undersigned will not offer, sell, contract to sell, pledge or otherwise dispose of, directly or indirectly, any shares of Securities or securities convertible into or exchangeable or exercisable for any shares of Securities, enter into a transaction that would have the same effect, or enter into any swap, hedge or other arrangement that transfers, in whole or in part, any of the economic consequences of ownership of the Securities, whether any such aforementioned transaction is to be settled by delivery of the Securities or such other securities, in cash or otherwise, or publicly disclose the intention to make any such offer, sale, pledge or disposition, or to enter into any such transaction, swap, hedge or other arrangement, without, in each case, the prior written consent of Credit Suisse First Boston LLC (“CSFB”) and Citigroup Global Markets Inc. (“Citigroup”). In addition, the undersigned agrees that, without the prior written consent of CSFB and Citigroup, it will not, during the Lock-Up Period, make any demand for or exercise any right with respect to, the registration of any Securities or any security convertible into or exercisable or exchangeable for the Securities.

The initial Lock-Up Period will commence on the date of this Lock-Up Agreement and continue and include the date 180 days after the public offering date set forth on the final prospectus used to sell the Securities (the “Public Offering Date”) pursuant to the Underwriting Agreement or such earlier date that CSFB and Citigroup consent to in writing; provided, however, that if (1) during the last 17 days of the initial Lock-Up Period, the Company releases earnings results or material news or a material event relating to the Company occurs or (2) prior to the expiration of the initial Lock-Up Period, the Company announces that it will release earnings results during the 16-day period beginning on the last day of the initial Lock-Up Period, then in either case the Lock-Up Period will be extended until the expiration of the 18-day period beginning on the date of the release of the earnings results or the occurrence of the material news or material event, as applicable, unless CSFB and Citigroup waive, in writing, such an extension.

The undersigned hereby acknowledges and agrees that written notice of any extension of the Lock-Up Period pursuant to the previous paragraph will be delivered by CSFB and Citigroup to the Company (in accordance

with Section 10 of the Underwriting Agreement) and that any such notice properly delivered will be deemed to have been given to, and received by, the undersigned. The undersigned further agrees that, prior to engaging in any transaction or taking any other action that is subject to the terms of this Lock-Up Agreement during the period from the date of this Lock-Up Agreement to and including the 34^th day following the expiration of the initial Lock-Up Period, the Undersigned will give notice thereof to the Company and will not consummate such transaction or take any such action unless it has received written confirmation from the Company that the Lock-Up Period (as it may have been extended pursuant to the previous paragraph) has expired.

Any Securities received upon exercise of options granted to the undersigned will also be subject to this Agreement. The foregoing restrictions will not apply to (1) a transfer of Securities to a family member or trust for the benefit of a family member or (2) a bona fide gift of Securities, provided the transferee agrees to be bound in writing by the terms of this Agreement prior to such transfer and no filing by any party (donor, donee, transferor or transferee) under the Securities Exchange Act of 1934 shall be required or shall be voluntarily made in connection with such transfer (other than a filing on a Form 5).

In furtherance of the foregoing, the Company and its transfer agent and registrar are hereby authorized to decline to make any transfer of shares of Securities if such transfer would constitute a violation or breach of this Lock-Up Agreement

This Lock-Up Agreement shall be binding on the undersigned and the successors, heirs, personal representatives and assigns of the undersigned. This Lock-Up Agreement shall lapse and become null and void if the Public Offering Date shall not have occurred on or before December 31, 2005. This Lock-Up Agreement shall be governed by, and construed in accordance with, the laws of the State of New York.

Very truly yours,

HERCULES OFFSHORE, INC. COMMON STOCK UNDERWRITING AGREEMENT

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