CREDIT AGREEMENT

Exhibit 10.1

CREDIT AGREEMENT

dated as of August 20, 2008

among

SMITH INTERNATIONAL, INC.,

The Lenders From Time to Time Party Hereto

and

FORTIS BANK SA/NV, NEW YORK BRANCH,
as Administrative Agent

WELLS FARGO BANK, N.A.,
as Syndication Agent

CALYON NEW YORK BRANCH, DNB NOR BANK ASA and THE ROYAL BANK OF SCOTLAND PLC,
as Co-Documentation Agents

and

DNB NOR BANK ASA and FORTIS BANK SA/NV, NEW YORK BRANCH,
as Co-Lead Arrangers and Joint Bookrunners

TABLE OF CONTENTS

TABLE OF CONTENTS

Schedule 1.01 — Applicable Margin
Schedule 2.01 — Commitments
Schedule 6.01 — Existing Subsidiary Indebtedness
Schedule 6.02 — Existing Liens
Schedule 6.03 — Certain Permitted Transfers

Exhibit A — Assignment and Assumption
Exhibit B-1 — Term Note
Exhibit B-2 — Bridge Note

CREDIT AGREEMENT

     CREDIT AGREEMENT (as amended, modified, restated, supplemented and in effect from time to time, herein called this “ Agreement ”) dated as of August 20, 2008, among SMITH INTERNATIONAL, INC., a Delaware corporation, the LENDERS party hereto, WELLS FARGO BANK, N.A., as Syndication Agent, CALYON NEW YORK BRANCH, DNB NOR BANK ASA and THE ROYAL BANK OF SCOTLAND PLC, as Co-Documentation Agents, DNB NOR BANK ASA and FORTIS BANK SA/NV, NEW YORK BRANCH, as Co-Lead Arrangers and Joint Bookrunners and FORTIS BANK SA/NV, NEW YORK BRANCH, as Administrative Agent for the Lenders.

     The parties hereto agree as follows:

ARTICLE I
Definitions

     SECTION 1.01 Defined Terms . As used in this Agreement, the following terms have the meanings specified below:

     “ ABR ”, when used in reference to any Loan or Borrowing, refers to whether such Loan, or the Loans comprising such Borrowing, are bearing interest at a rate determined by reference to the Alternate Base Rate.

     “ Adjusted LIBO Rate ” means, with respect to any Eurodollar Borrowing for any Interest Period, an interest rate per annum (rounded upwards, if necessary, to the next 1/16 of 1%) equal to (a) the LIBO Rate for such Interest Period multiplied by (b) the Statutory Reserve Rate.

     “ Administrative Agent ” means Fortis Bank SA/NV, New York Branch, in its capacity as administrative agent for the Lenders hereunder, and its successors in that capacity.

     “ Administrative Questionnaire ” means an Administrative Questionnaire in a form supplied by the Administrative Agent.

     “ Affiliate ” means, with respect to a specified Person, another Person that directly, or indirectly through one or more intermediaries, Controls or is Controlled by or is under common Control with the Person specified.

     “ Alternate Base Rate ” means, for any day, a rate per annum equal to the greater of (a) the Federal Funds Effective Rate in effect on such day plus 1/2 of 1% or (b) the Prime Rate in effect on such day. Any change in the Alternate Base Rate due to a change in the Prime Rate or the Federal Funds Effective Rate shall be effective from and including the effective date of such change in the Prime Rate or the Federal Funds Effective Rate, respectively.

     “ Applicable Percentage ” means, with respect to any Lender, the percentage of the total Commitments represented by such Lender’s Commitment. If the Commitments have terminated

or expired, the Applicable Percentages shall be determined based upon the Commitments most recently in effect, giving effect to any assignments.

     “ Applicable Margin ” means, for any day with respect to any ABR Loan or Eurodollar Loan r, as the case may be, the applicable margin per annum set forth on Schedule 1.01 hereto under the caption “ABR Applicable Margin” or “Adjusted LIBO Applicable Margin”, as the case may be, based upon the ratings by Moody’s and S&P, respectively, applicable on such date to the Index Debt. For purposes of the foregoing, (i) if both Moody’s and S&P shall not have in effect a rating for the Index Debt (other than by reason of the circumstances referred to in the last sentence of this definition), then such rating agencies shall be deemed to have established a rating in Category 6, and if either (but not both), Moody’s and S&P shall not have in effect a rating for the Index Debt (other than by reason of the circumstances referred to in the last sentence of this definition), then the remaining rating shall control; (ii) if the ratings established or deemed to have been established by Moody’s and S&P for the Index Debt shall fall within different Categories, the Applicable Margin shall be based on the higher of the two ratings unless one of the two ratings is two or more Categories lower than the other, in which case the Applicable Margin shall be determined by reference to the Category next below that of the higher of the two ratings; and (iii) if the ratings established or deemed to have been established by Moody’s and S&P for the Index Debt shall be changed (other than as a result of a change in the rating system of Moody’s or S&P), such change shall be effective as of the date on which it is first announced by the applicable rating agency, irrespective of when notice of such change shall have been furnished to the Agent and the Lenders pursuant to Section 5.01 or otherwise. Each change in the Applicable Margin shall apply during the period commencing on the effective date of such change and ending on the date immediately preceding the effective date of the next such change. If the rating system of Moody’s or S&P shall change, or if either such rating agency shall cease to be in the business of rating corporate debt obligations, Borrower and the Lenders shall negotiate in good faith to amend this definition to reflect such changed rating system or the unavailability of ratings from such rating agency and, pending the effectiveness of any such amendment, the Applicable Margin shall be determined by reference to the rating most recently in effect prior to such change or cessation.

     “ Approved Fund ” has the meaning assigned to such term in Section 9.04 .

     “ Asset Sale ” means a sale, transfer or other disposition of an entire or partial interest in a business operation of the Borrower, in one transaction or a series of transactions, with Net Asset Sales Proceeds in excess of $100,000,000.

     “ Assignment and Assumption ” means an assignment and assumption entered into by a Lender and an assignee (with the consent of any party whose consent is required by Section 9.04 ), and accepted by the Administrative Agent, in the form of Exhibit A or any other form approved by the Administrative Agent.

     “ Board ” means the Board of Governors of the Federal Reserve System of the United States of America and any successor entity performing similar functions.

     “ Borrower ” means Smith International, Inc., a Delaware corporation.

     “ Borrowing ” means Loans of the same Type made, converted or continued on the same date and, in the case of Eurodollar Loans, as to which a single Interest Period is in effect.

     “ Borrowing Request ” means a request by Borrower for a Borrowing in accordance with Section 2.03 .

     “ Bridge Loan Commitment ” means, with respect to each Lender, the commitment, if any, of such Lender to make Bridge Loans, expressed as an amount representing the maximum aggregate amount of such Lender’s Bridge Loan hereunder, as such commitment may be reduced or increased from time to time pursuant to assignments by or to such Lender pursuant to Section 9.04 . The initial amount of each Lender’s Bridge Loan Commitment is set forth on Schedule 2.01 , or in the Assignment and Assumption pursuant to which such Lender shall have assumed its Bridge Loan Commitment, as applicable. The initial aggregate amount of the Lenders’ Bridge Loan Commitments is $1,000,000,000.

     “ Bridge Loan ” means a Loan made pursuant to Section 2.01(b) .

     “ Bridge Loan Maturity Date ” means August 19, 2009.

     “ Business Day ” means any day that is not a Saturday, Sunday or other day on which national banks in New York City are authorized or required by law to remain closed; provided that, when used in connection with a Eurodollar Loan, the term “ Business Day ” shall also exclude any day on which banks are not open for dealings in Dollar deposits in the London interbank market.

     “ Capital Lease Obligations ” means, as to any Person, the obligations of such Person to pay rent or other amounts under a lease of (or other agreement conveying the right to use) real and/or personal property which obligations are required to be classified and accounted for as a capital lease on a balance sheet of such Person under GAAP (including Statement of Financial Accounting Standards No. 13 of the Financial Accounting Standards Board, as amended) and, for purposes of this Agreement, the amount of such obligations shall be the capitalized amount thereof, determined in accordance with GAAP (including such Statement No. 13). Capital Lease Obligations shall not include the interest component of any applicable rental payment.

     “ Ceiling Rate ” means, on any day, the maximum nonusurious rate of interest permitted for that day by whichever of applicable federal or New York (or any jurisdiction whose usury laws are deemed to apply to the Notes or any other Loan Documents despite the intention and desire of the parties to apply the usury laws of the State of New York) laws permits the higher interest rate, stated as a rate per annum. On each day, if any, that the Texas Finance Code establishes the Ceiling Rate, the Ceiling Rate shall be the “weekly ceiling” (as defined in the Texas Finance Code) for that day. Administrative Agent may from time to time, as to current and future balances, implement any other ceiling under the Texas Finance Code by notice to Borrower, if and to the extent permitted by the Texas Finance Code. Without notice to Borrower or any other Person, the Ceiling Rate shall automatically fluctuate upward and downward as and in the amount by which such maximum nonusurious rate of interest permitted by applicable law fluctuates.

     “ Change in Control ” means (a) the acquisition of ownership, directly or indirectly, beneficially or of record, by any Person or group (within the meaning of the Securities Exchange Act of 1934 and the rules of the Securities and Exchange Commission thereunder as in effect on the date hereof), of Equity Interests representing more than 50% of the aggregate ordinary voting power represented by the issued and outstanding Equity Interests of Borrower; (b) occupation of a majority of the seats (other than vacant seats) on the board of directors of Borrower by Persons who were neither (i) nominated by the board of directors of Borrower nor (ii) appointed by directors so nominated; or (c) the acquisition of direct or indirect Control of Borrower by any Person or group.

     “ Change in Law ” means (a) the adoption of any law, rule or regulation after the date of this Agreement, (b) any change in any law, rule or regulation or in the interpretation or application thereof by any Governmental Authority after the date of this Agreement or (c) compliance by any Lender (or, for purposes of Section 2.13(b) , by any lending office of such Lender or by such Lender’s holding company, if any) with any request, guideline or directive (whether or not having the force of law) of any Governmental Authority made or issued after the date of this Agreement.

     “ CLO ” has the meaning assigned to such term in Section 9.04 .

     “ Code ” means the Internal Revenue Code of 1986, as amended from time to time.

     “ Commitment ” means a Term Loan Commitment or a Bridge Loan Commitment.

     “ Control ” means the possession, directly or indirectly, of the power to direct or cause the direction of the management or policies of a Person, whether through the ability to exercise voting power, by contract or otherwise. “ Controlling ” and “ Controlled ” have meanings correlative thereto.

     “ Debt to Capitalization Ratio ” shall mean, as of any day, without duplication, the ratio of (a) interest bearing Indebtedness (including Indebtedness bearing imputed interest as a result of having been issued at a discount and including the principal component of Capital Lease Obligations) to (b) the sum of (i) such interest bearing Indebtedness plus (ii) stockholders’ equity as determined in accordance with GAAP plus (iii) minority interests in majority-owned Subsidiaries. For purposes of this definition, the term “Indebtedness” shall not include intercompany debt which is held by Borrower or any of its Subsidiaries.

     “ Default ” means any event or condition which constitutes an Event of Default or which upon notice, lapse of time or both would, unless cured or waived, become an Event of Default.

     “ Dollars ” or “ $ ” refers to lawful money of the United States of America.

     “ Effective Date ” means the first date on which the conditions specified in Section 4.01 are satisfied (or waived in accordance with Section 9.02 ); provided that the Effective Date shall be no later than August 25, 2008.

     “ Environmental Laws ” means all laws, rules, regulations, codes, ordinances, orders, decrees, judgments, injunctions, notices or binding agreements issued, promulgated or entered into by any Governmental Authority, relating in any way to the environment, preservation or reclamation of natural resources or the management, release or threatened release of any Hazardous Material.

     “ Environmental Liability ” means any liability, contingent or otherwise (including any liability for damages, costs of environmental remediation, fines, penalties or indemnities), of Borrower or any Material Subsidiary directly or indirectly resulting from or based upon (a) violation of any Environmental Law, (b) the generation, use, handling, transportation, storage, treatment or disposal of any Hazardous Materials, (c) exposure to any Hazardous Materials, (d) the release or threatened release of any Hazardous Materials into the environment or (e) any contract, agreement or other consensual arrangement pursuant to which liability is assumed or imposed with respect to any of the foregoing.

     “ Equity Interests ” means shares of capital stock, partnership interests, membership interests in a limited liability company, beneficial interests in a trust or other equity ownership interests in a Person, and any warrants, options or other rights entitling the holder thereof to purchase or acquire any such equity interest.

     “ ERISA ” means the Employee Retirement Income Security Act of 1974, as amended from time to time.

     “ ERISA Affiliate ” means any trade or business (whether or not incorporated) that, together with Borrower, is treated as a single employer under Section 414(b) or (c) of the Code or, solely for purposes of Section 302 of ERISA and Section 412 of the Code, is treated as a single employer under Section 414 of the Code.

     “ ERISA Event ” means (a) any “reportable event”, as defined in Section 4043 of ERISA or the regulations issued thereunder with respect to a Plan (other than an event for which the 30-day notice period is waived); (b) the existence with respect to any Plan of an “accumulated funding deficiency” (as defined in Section 412 of the Code or Section 302 of ERISA), whether or not waived; (c) the filing pursuant to Section 412(d) of the Code or Section 303(d) of ERISA of an application for a waiver of the minimum funding standard with respect to any Plan; (d) the incurrence by Borrower or any of its ERISA Affiliates of any liability under Title IV of ERISA with respect to the termination of any Plan; (e) the receipt by Borrower or any ERISA Affiliate from the PBGC or a plan administrator of any notice relating to an intention to terminate any Plan or Plans or to appoint a trustee to administer any Plan; (f) the incurrence by Borrower or any of its ERISA Affiliates of any liability with respect to the withdrawal or partial withdrawal from any Plan or Multiemployer Plan; or (g) the receipt by Borrower or any ERISA Affiliate of any notice, or the receipt by any Multiemployer Plan from Borrower or any ERISA Affiliate of any notice, concerning the imposition of Withdrawal Liability or a determination that a Multiemployer Plan is, or is expected to be, insolvent or in reorganization, within the meaning of Title IV of ERISA.

     “ Eurodollar ”, when used in reference to any Loan or Borrowing, refers to whether such Loan, or the Loans comprising such Borrowing, are bearing interest at a rate determined by reference to the Adjusted LIBO Rate.

     “ Eurodollar Office ” means with respect to any Lender the office or offices of such Lender which shall be making or maintaining the Eurodollar Borrowing of such Lender hereunder. A Eurodollar Office of any Lender may be, at the option of such Lender, either a domestic or foreign office.

     “ Event of Default ” has the meaning assigned to such term in Article VII .

     “ Excluded Taxes ” means, with respect to the Administrative Agent, any Lender or any other recipient of any payment to be made by or on account of any obligation of Borrower hereunder, (a) income or franchise taxes imposed on (or measured by) its net income by the United States of America, or by the jurisdiction under the laws of which such recipient is organized or in which its principal office is located or, in the case of any Lender, in which its applicable lending office is located, (b) any branch profits taxes imposed by the United States of America or any similar tax imposed by any other jurisdiction in which Borrower is located and (c) in the case of a Foreign Lender (other than an assignee pursuant to a request by Borrower under Section 2.17(b) ), any withholding tax that is imposed on amounts payable to such Foreign Lender at the time such Foreign Lender becomes a party to this Agreement (or designates a new lending office) or is attributable to such Foreign Lender’s failure to comply with Section 2.15(e) , except to the extent that such Foreign Lender (or its assignor, if any) was entitled, at the time of designation of a new lending office (or assignment), to receive additional amounts from Borrower with respect to such withholding tax pursuant to Section 2.15(a) .

     “ Federal Funds Effective Rate ” means, for any day, the weighted average (rounded upwards, if necessary, to the next 1/100 of 1%) of the rates on overnight Federal funds transactions with members of the Federal Reserve System arranged by Federal funds brokers, as published on the next succeeding Business Day by the Federal Reserve Bank of New York, or, if such rate is not so published for any day that is a Business Day, the average (rounded upwards, if necessary, to the next 1/100 of 1%) of the quotations for such day for such transactions received by the Administrative Agent from three Federal funds brokers of recognized standing selected by the Administrative Agent.

     “ Financial Officer ” means the chief financial officer, principal accounting officer, treasurer or controller of Borrower.

     “ Foreign Lender ” means any Lender that is organized under the laws of a jurisdiction other than that in which Borrower is located. For purposes of this definition, the United States of America, each State thereof and the District of Columbia shall be deemed to constitute a single jurisdiction.

     “ GAAP ” means generally accepted accounting principles in the United States of America.

     “ Governmental Authority ” means the government of the United States of America, any other nation or any political subdivision thereof, whether state or local, and any agency, authority, instrumentality, regulatory body, court, central bank or other entity exercising executive, legislative, judicial, taxing, regulatory or administrative powers or functions of or pertaining to government.

     “ Guarantee ” of or by any Person (the “ guarantor ”) means any obligation, contingent or otherwise, of the guarantor guaranteeing or having the economic effect of guaranteeing any Indebtedness or other obligation of any other Person (the “ primary obligor ”) in any manner, whether directly or indirectly, and including any obligation of the guarantor, direct or indirect, (a) to purchase or pay (or advance or supply funds for the purchase or payment of) such Indebtedness or other obligation or to purchase (or to advance or supply funds for the purchase of) any security for the payment thereof, (b) to purchase or lease property, securities or services for the purpose of assuring the owner of such Indebtedness or other obligation of the payment thereof, (c) to maintain working capital, equity capital or any other financial statement condition or liquidity of the primary obligor so as to enable the primary obligor to pay such Indebtedness or other obligation or (d) as an account party in respect of any letter of credit or letter of guaranty issued to support such Indebtedness or obligation; provided , that the term Guarantee shall not include endorsements for collection or deposit in the ordinary course of business.

     “ Hazardous Materials ” means all explosive or radioactive substances or wastes and all hazardous or toxic substances, wastes or other pollutants, including petroleum or petroleum distillates, asbestos or asbestos containing materials, polychlorinated biphenyls, radon gas, infectious or medical wastes and all other substances or wastes of any nature regulated pursuant to any Environmental Law.

     “ Indebtedness ” shall mean and include with respect to any Person (a) all items which in accordance with GAAP would be included on the liability side of a balance sheet of such Person on the date as of which Indebtedness is to be determined (excluding capital stock, surplus, surplus reserves and deferred credits); (b) all guaranties, letter of credit contingent reimbursement obligations, endorsements and other contingent obligations in respect of, or any obligations to purchase or otherwise acquire, Indebtedness of others, and (c) all Indebtedness secured by any Lien existing on any interest of such Person in property owned subject to such Lien whether or not the Indebtedness secured thereby shall have been assumed; provided, that the term “Indebtedness” shall not mean or include any Indebtedness in respect of which monies sufficient to pay and discharge the same in full (either on the expressed date of maturity thereof or on such earlier date as such Indebtedness may be duly called for redemption and payment) shall be deposited, in a manner and with a depository, agency or trustee reasonably acceptable to the Agent, in trust for the payment thereof. “Indebtedness” shall not include trade payables and expense accruals incurred in the ordinary course of the applicable Person’s business provided that such payables have not remained unpaid for a period of ninety (90) days after the same became due. Expenses which are classified as “operating lease expenses” under GAAP shall not constitute “Indebtedness” under this Agreement.

     “ Indemnified Taxes ” means Taxes other than Excluded Taxes.

     “ Index Debt ” means senior, unsecured, long-term indebtedness for borrowed money of Borrower that is not guaranteed by any other Person or subject to any other credit enhancement.

     “ Interest Election Request ” means a request by Borrower to convert or continue a Loan in accordance with Section 2.06 .

     “ Interest Expense ” shall mean, for any period, the sum of (a) the cash interest payments by an obligor made or accrued in accordance with GAAP during such period in connection with all of its interest-bearing Indebtedness and (b) the interest component of any Capital Lease Obligations.

     “ Interest Payment Date ” means (a) with respect to any ABR Loan, the first day of each January, April, July and October, and (b) with respect to any Eurodollar Loan, the last day of the Interest Period applicable to the Borrowing of which such Loan is a part and, in the case of a Eurodollar Borrowing with an Interest Period of more than three months’ duration, each day prior to the last day of such Interest Period that occurs at intervals of three months’ duration after the first day of such Interest Period.

     “ Interest Period ” means with respect to any Eurodollar Borrowing, the period commencing on the date of such Borrowing and ending on the numerically corresponding day in the calendar month that is one, two, three, six, nine or twelve months (or one week, in the case of an Interest Period commencing on the Effective Date) thereafter, as Borrower may elect; provided , that (i) if any Interest Period would end on a day other than a Business Day, such Interest Period shall be extended to the next succeeding Business Day unless such next succeeding Business Day would fall in the next calendar month, in which case such Interest Period shall end on the next preceding Business Day, and (ii) any Interest Period that commences on the last Business Day of a calendar month (or on a day for which there is no numerically corresponding day in the last calendar month of such Interest Period) shall end on the last Business Day of the last calendar month of such Interest Period. For purposes hereof, the date of a Borrowing initially shall be the date on which such Borrowing is made and thereafter shall be the effective date of the most recent conversion or continuation of such Borrowing.

     “ Lenders ” means the Persons listed on Schedule 2.01 and any other Person that shall have become a party hereto pursuant to an Assignment and Assumption, other than any such Person that ceases to be a party hereto pursuant to an Assignment and Assumption.

     “ LIBO Rate ”, with respect to any Eurodollar Borrowing for any Interest Period: (a) a rate per annum equal to the offered rate for deposits in Dollars for a period equal or comparable to such Interest Period which appears on Page BBAM of the Bloomberg Financial Markets Information Service as of noon, New York City time, two Business Days prior to the first day of such Interest Period, or (b) in the event the rate referenced in the preceding subsection (a) does not appear on such page or service or such page or service shall cease to be available, the rate per annum equal to the rate determined by the Administrative Agent as the offered rate on such other page or other service that displays an average British Bankers Association Interest Settlement Rate for deposits in Dollars (for delivery on the first day of such Interest Period) with a term equivalent to such Interest Period, determined as of approximately 11:00 a.m. (London time) two Business Days prior to the first day of such Interest Period, or (c) in the event the rates

referenced in the preceding subsections (a) and (b) are not available, the rate per annum determined by the Administrative Agent (in its reasonable discretion) as the rate of interest at which Dollar deposits (for delivery on the first day of such Interest Period) in same day funds in the approximate amount of the applicable Eurodollar Borrowing and with a term equivalent to such Interest Period would be offered by the Administrative Agent’s Eurodollar Office to major banks in the offshore Dollar market at their request at approximately noon, New York City time, two Business Days prior to the first day of such Interest Period.

     “ Lien ” means, with respect to any asset, (a) any mortgage, deed of trust, lien, pledge, hypothecation, encumbrance, charge or security interest in, on or of such asset, (b) the interest of a vendor or a lessor under any conditional sale agreement, capital lease or title retention agreement (or any financing lease having substantially the same economic effect as any of the foregoing) relating to such asset and (c) in the case of securities, any purchase option, call or similar right of a third party with respect to such securities.

     “ Loan ” means a Term Loan or a Bridge Loan made pursuant to Section 2.01 .

     “ Loan Documents ” means, collectively, this Agreement, the Notes, all instruments, certificates and agreements now or hereafter executed or delivered to the Administrative Agent or any Lender pursuant to any of the foregoing or in connection with the obligations of Borrower under this Agreement and the other Loan Documents or any commitment regarding such obligations, and all amendments, modifications, renewals, extensions, increases and rearrangements of, and substitutions for, any of the foregoing.

     “ Loans ” means the loans made by the Lenders to Borrower pursuant to this Agreement.

     “ Material Adverse Effect ” means a material adverse effect on (a) the business, assets, property or condition (financial or otherwise) of Borrower and its Subsidiaries, taken as a whole, (b) the validity or enforceability against Borrower of any of the Loan Documents or (c) the rights of or benefits available to the Administrative Agent or the Lenders under any Loan Document.

     “ Material Indebtedness ” means Indebtedness (other than the Loans), or obligations in respect of one or more Swap Agreements, of Borrower or any of its Material Subsidiaries in an aggregate principal amount exceeding $7,500,000. For purposes of determining Material Indebtedness, the “principal amount” of the obligations in respect of any Swap Agreement at any time shall be the maximum aggregate amount (giving effect to any netting agreements) that would be required to be paid if such Swap Agreement were terminated at such time.

     “ Material Subsidiary ” means each Subsidiary of Borrower with assets comprising 5% or more of the aggregate fair market value of all assets of Borrower and its Subsidiaries on a consolidated basis or with a tangible net worth comprising 5% or more of the tangible net worth of Borrower and its Subsidiaries on a consolidated basis. W-H shall be deemed to constitute a Material Subsidiary hereunder for all purposes (as if all of the Equity Interests in and to W-H shall have been acquired on the Effective Date immediately prior to giving effect to this Agreement).

     “ Minimum Hold Amount ” means $20,000,000.

     “ Moody’s ” means Moody’s Investors Service, Inc.

     “ Multiemployer Plan ” means a multiemployer plan as defined in Section 4001(a)(3) of ERISA.

     “ Net Asset Sale Proceed s” means, with respect to any Asset Sale, an amount equal to: (i) cash payments (including any cash received by way of deferred payment pursuant to, or by monetization of, a note receivable or otherwise, but only as and when so received) received by Borrower or any of its Subsidiaries from such Asset Sale, minus (ii) any bona fide direct fees (including attorney’s fees, accountants’ fees, investment banking fees, brokerage, consultant and other customary fees, in each case, incurred in connection with such Asset Sale), commissions, transfer taxes and other customary costs and expenses, in each case, incurred in connection with such Asset Sale, including (a) taxes paid or payable by Borrower or any of its Subsidiaries as a result of any gain recognized in connection with such Asset Sale, (b) payment of the outstanding principal amount of, premium or penalty, if any, and interest on any Indebtedness (other than the Loans) that is secured by a Lien on the stock or assets in question and that is required to be repaid under the terms thereof as a result of such Asset Sale, (c) amounts provided as a reserve, in accordance with GAAP, against any liabilities (fixed or contingent) in respect of any indemnification obligations undertaken by Borrower or any of its Subsidiaries or purchase price adjustment associated with such Asset Sale (provided that, to the extent and at any time such amounts are released from such reserve, such amounts shall constitute Net Asset Sale Proceeds) and (d) any amount required to be paid to any Person (other than Borrower or any of its Subsidiaries) with a beneficial ownership interest (including such interest by a holder of a minority interest in the Subsidiary that has sold such property or assets) in the property or assets to be sold pursuant to such Asset Sale.

     “ Notes ” shall have the meaning assigned to such term in Section 2.02(a) hereof.

     “ Obligations ” means, as at any date of determination thereof, the aggregate principal amount of Loans outstanding hereunder.

     “ Other Taxes ” means any and all present or future stamp or documentary taxes or any other excise or property taxes, charges or similar levies arising from any payment made under any Loan Document or from the execution, delivery or enforcement of, or otherwise with respect to, any Loan Document.

     “ Participant ” has the meaning set forth in Section 9.04 .

     “ PBGC ” means the Pension Benefit Guaranty Corporation referred to and defined in ERISA and any successor entity performing similar functions.

     “ Permitted Encumbrances ” means:

     (a) Liens imposed by law for taxes that are not yet due or are being contested in compliance with the provisions of this Agreement;

     (b) carriers’, warehousemen’s, mechanics’, materialmen’s, repairmen’s and other like Liens imposed by law, arising in the ordinary course of business and securing obligations that are not overdue by more than 30 days or are being contested in compliance with Section 5.04 ;

     (c) Liens, pledges and deposits made in the ordinary course of business in compliance with workers’ compensation, unemployment insurance and other social security laws or regulations;

     (d) deposits to secure insurance obligations and the performance of bids, trade contracts, leases, statutory obligations, surety and appeal bonds, performance bonds and other obligations of a like nature, in each case in the ordinary course of business;

     (e) judgment and similar liens in respect of judgments that do not constitute an Event of Default under this Agreement; and

     (f) easements, zoning restrictions, rights-of-way and similar encumbrances and restrictions on real property imposed by law or arising in the ordinary course of business that do not secure any monetary obligations and do not materially detract from the value of the affected property or interfere with the ordinary conduct of business of Borrower or any of its Subsidiaries;

     (g) Liens arising from Swap Agreements;

     provided that the term “Permitted Encumbrances” shall not include any Lien securing Indebtedness.

     “ Person ” means any natural person, corporation, limited liability company, trust, joint venture, association, company, partnership, Governmental Authority or other entity.

     “ Plan ” means any employee pension benefit plan (other than a Multiemployer Plan) subject to the provisions of Title IV of ERISA or Section 412 of the Code or Section 302 of ERISA, and in respect of which Borrower or any ERISA Affiliate is (or, if such plan were terminated, would under Section 4069 of ERISA be deemed to be) an “employer” as defined in Section 3(5) of ERISA.

     “ Prime Rate ” means, on any day, the prime rate of Fortis Bank SA/NV, New York Branch in effect for that day at the principal offices of Fortis Bank SA/NV, New York Branch in New York, New York. The Prime Rate is a reference rate and does not necessarily represent the lowest or best rate or a favored rate, and Administrative Agent and each Lender disclaims any statement, representation or warranty to the contrary. Administrative Agent or any Lender may make commercial loans or other loans at rates of interest at, above or below the Prime Rate.

     “ Public Debt Offering ” means issuance of additional Indebtedness of the Borrower in a debt capital markets transaction.

     “ Register ” has the meaning set forth in Section 9.04 .

     “ Related Parties ” means, with respect to any specified Person, such Person’s Affiliates and the respective directors, officers, employees, agents and advisors of such Person and such Person’s Affiliates.

     “ Required Lenders ” means, at any time, Lenders having outstanding Loans representing more than 50% of the sum of the total outstanding Loans at such time.

     “ S&P ” means Standard & Poor’s Ratings Group.

     “ Statutory Reserve Rate ” means a fraction (expressed as a decimal), the numerator of which is the number one and the denominator of which is the number one minus the aggregate of the maximum reserve percentages (including any marginal, special, emergency or supplemental reserves) expressed as a decimal established by the Board to which the Administrative Agent is subject, for eurocurrency funding (currently referred to as “Eurocurrency Liabilities” in Regulation D of the Board). Such reserve percentages shall include those imposed pursuant to such Regulation D. Eurodollar Loans shall be deemed to constitute eurocurrency funding and to be subject to such reserve requirements without benefit of or credit for proration, exemptions or offsets that may be available from time to time to any Lender under such Regulation D or any comparable regulation. The Statutory Reserve Rate shall be adjusted automatically on and as of the effective date of any change in any reserve percentage.

     “ Subsidiary ” means, with respect to any Person (the “ parent ”) at any date, any corporation, limited liability company, partnership, association or other entity the accounts of which would be consolidated with those of the parent in the parent’s consolidated financial statements if such financial statements were prepared in accordance with GAAP as of such date, as well as any other corporation, limited liability company, partnership, association or other entity (a) of which securities or other ownership interests representing more than 50% of the equity or more than 50% of the ordinary voting power or, in the case of a partnership, more than 50% of the general partnership interests are, as of such date, owned, Controlled or held, or (b) that is, as of such date, otherwise Controlled, by the parent or one or more Subsidiaries of the parent or by the parent and one or more Subsidiaries of the parent.

     “ Swap Agreement ” means any agreement with respect to any swap, forward, future or derivative transaction or option or similar agreement involving, or settled by reference to, one or more rates, currencies, commodities, equity or debt instruments or securities, or economic, financial or pricing indices or measures of economic, financial or pricing risk or value or any similar transaction or any combination of these transactions; provided that no phantom stock or similar plan providing for payments only on account of services provided by current or former directors, officers, employees or consultants of Borrower or any of its Subsidiaries shall be a Swap Agreement.

     “ Taxes ” means any and all present or future taxes, levies, imposts, duties, deductions, charges or withholdings imposed by any Governmental Authority.

     “ Term Loan Commitment ” means, with respect to each Lender, the commitment, if any, of such Lender to make Term Loans, expressed as an amount representing the maximum aggregate amount of such Lender’s Term Loans hereunder, as such commitment may be reduced

or increased from time to time pursuant to assignments by or to such Lender pursuant to Section 9.04 . The initial amount of each Lender’s Term Loan Commitment is set forth on Schedule 2.01 , or in the Assignment and Assumption pursuant to which such Lender shall have assumed its Term Loan Commitment, as applicable. The initial aggregate amount of the Lenders’ Term Loan Commitments is $1,000,000,000.

     “ Term Loan ” means a Loan made pursuant to Section 2.01(a) .

     “ Term Loan Maturity Date ” means June 30, 2012.

     “ Transactions ” means (a) the execution, delivery and performance by Borrower of the Loan Documents to which it is to be a party, the borrowing of Loans and the use of the proceeds thereof and (b) the execution, delivery and performance by Borrower of each other document and instrument required to satisfy the conditions precedent to the initial Loan hereunder.

     “ Type ”, when used in reference to any Loan or Borrowing, refers to whether the rate of interest on such Loan, or on the Loans comprising such Borrowing, is determined by reference to the Adjusted LIBO Rate or the Alternate Base Rate.

     “ W-H ” means W-H Energy Services, Inc., a Texas corporation.

     “ Withdrawal Liability ” means liability to a Multiemployer Plan as a result of a complete or partial withdrawal from such Multiemployer Plan, as such terms are defined in Part I of Subtitle E of Title IV of ERISA.

     SECTION 1.02 Classification of Loans and Borrowings. For purposes of this Agreement, Loans may be classified and referred to by Type ( e.g. , a “Eurodollar Loan”). Borrowings also may be classified and referred to by Type ( e.g. , a “Eurodollar Borrowing”).

     SECTION 1.03 Terms Generally. The definitions of terms herein shall apply equally to the singular and plural forms of the terms defined. Whenever the context may require, any pronoun shall include the corresponding masculine, feminine and neuter forms. The words “include”, “includes” and “including” shall be deemed to be followed by the phrase “without limitation”. The word “will” shall be construed to have the same meaning and effect as the word “shall”. Unless the context requires otherwise (a) any definition of or reference to any agreement, instrument or other document herein shall be construed as referring to such agreement, instrument or other document as from time to time amended, supplemented or otherwise modified (subject to any restrictions on such amendments, supplements or modifications set forth herein), (b) any reference herein to any Person shall be construed to include such Person’s successors and assigns, (c) the words “herein”, “hereof” and “hereunder”, and words of similar import, shall be construed to refer to this Agreement in its entirety and not to any particular provision hereof, (d) all references herein to Articles, Sections, Exhibits and Schedules shall be construed to refer to Articles and Sections of, and Exhibits and Schedules to, this Agreement and (e) the words “asset” and “property” shall be construed to have the same meaning and effect and to refer to any and all tangible and intangible assets and properties, including cash, securities, accounts and contract rights.

     SECTION 1.04 Accounting Terms; GAAP. Except as otherwise expressly provided herein, all terms of an accounting or financial nature shall be construed in accordance with GAAP, as in effect from time to time; provided that, if Borrower notifies the Administrative Agent that Borrower requests an amendment to any provision hereof to eliminate the effect of any change occurring after the date hereof in GAAP or in the application thereof on the operation of such provision (or if the Administrative Agent notifies Borrower that the Required Lenders request an amendment to any provision hereof for such purpose), regardless of whether any such notice is given before or after such change in GAAP or in the application thereof, then such provision shall be interpreted on the basis of GAAP as in effect and applied immediately before such change shall have become effective until such notice shall have been withdrawn or such provision amended in accordance herewith.

ARTICLE II
The Credits

     SECTION 2.01 Commitments.

     (a) Subject to the terms and conditions set forth herein, each Lender agrees to make Term Loans to Borrower on the Effective Date in an aggregate principal amount equal to such Lender’s Term Loan Commitment. Amounts repaid on the Term Loans may not be reborrowed.

     (b) Subject to the terms and conditions set forth herein, each Lender agrees to make Bridge Loans to Borrower on the Effective Date in an aggregate principal amount equal to such Lender’s Bridge Loan Commitment. Amounts repaid on the Bridge Loans may not be reborrowed.

     SECTION 2.02 Loans and Borrowings .

     (a) Each Loan shall be made as part of a Borrowing consisting of Loans of the same Type made by the Lenders ratably in accordance with their respective Commitments. The failure of any Lender to make any Loan required to be made by it shall not relieve any other Lender of its obligations hereunder; provided that the Commitments of the Lenders are several and no Lender shall be responsible for any other Lender’s failure to make Loans as required. The Term Loans made by each Lender shall be evidenced by a single Note of Borrower in substantially the form of Exhibit B-1 payable to the order of such Lender in a principal amount equal to the applicable Term Loan Commitment of such Lender, and otherwise duly completed and the Bridge Loans made by each Lender shall be evidenced by a single Note of Borrower in substantially the form of Exhibit B-2 payable to the order of such Lender in a principal amount equal to the applicable Bridge Loan Commitment of such Lender, and otherwise duly completed (such notes, together with all renewals, extensions, modifications and replacements thereof and substitutions therefor, being herein called a “ Note ” and collectively called the “ Notes ”). Each Lender is hereby authorized by Borrower to endorse on the schedule (or a continuation thereof) that may be attached to each Note of such Lender, to the extent applicable, the date, amount, type of and the applicable period of interest for each Loan made by such Lender to Borrower hereunder, and the amount of each payment or prepayment of principal of such Loan received by such Lender, provided, that any failure by such Lender to make any such endorsement shall not affect the obligations of Borrower under such Note or hereunder in respect of such Loan.

     (b) Subject to Section 2.12 , each Loan shall be comprised entirely of ABR Loans or Eurodollar Loans as Borrower may request in accordance herewith. Each Lender at its option may make any Eurodollar Loan by causing any domestic or foreign branch or Affiliate of such Lender to make such Loan; provided that any exercise of such option shall not affect the obligation of Borrower to repay such Loan in accordance with the terms of this Agreement or otherwise result in an increased cost to Borrower.

     (c) At the commencement of each Interest Period for any Eurodollar Borrowing, such Borrowing shall be in an aggregate amount that is equal to $1,000,000 or an increment of $100,000 in excess thereof. At the time that each ABR Loan is made, such Borrowing shall be in an aggregate amount that is equal to $1,000,000 or an increment of $100,000 in excess thereof. Borrowings of more than one Type may be outstanding at the same time; provided that there shall not at any time be more than a total of five (5) Eurodollar Borrowings outstanding.

     (d) Notwithstanding any other provision of this Agreement, (i) Borrower shall not be entitled to request, or to elect to convert or continue, any Borrowing if the Interest Period requested with respect thereto would end after the Term Loan Maturity Date or the Bridge Loan Maturity Date, as the case may be, and (ii) Borrower shall not be entitled to request, or to elect to convert or continue, any Borrowing which is a Term Loan if after giving effect thereto the sum of the aggregate principal amount of outstanding Eurodollar Borrowings which are Term Loans with Interest Periods ending on or prior to any applicable scheduled repayment date plus the aggregate principal amount of outstanding ABR Borrowings which are Term Loans would be less than the aggregate principal amount of Term Loans required to be repaid on such scheduled repayment date.

     SECTION 2.03 Requests for Borrowings. To request a Loan, Borrower shall notify the Administrative Agent of such request by telephone (a) in the case of a Eurodollar Borrowing, not later than 11:00 a.m., New York City time, two Business Days before the date of the proposed Borrowing and (b) in the case of an ABR Borrowing, not later than noon, New York City time, on the date of the proposed Borrowing. Each such telephonic Borrowing Request shall be irrevocable and shall be confirmed by hand delivery or telecopy to the Administrative Agent on the same day as the telephonic request of a written Borrowing Request in a form approved by the Administrative Agent and signed by Borrower. Each such telephonic and written Borrowing Request shall specify the following information in compliance with Section 2.02 :

     (i) the aggregate amount of such Borrowing;

     (ii) the date of such Borrowing, which shall be a Business Day;

     (iii) whether such Borrowing is to be an ABR Borrowing or a Eurodollar Borrowing;

     (iv) in the case of a Eurodollar Borrowing, the initial Interest Period to be applicable thereto, which shall be a period contemplated by the definition of the term “Interest Period” (provided that the initial Interest Period shall be for one month); and

     (v) the location and number of Borrower’s account to which funds are to be disbursed, which shall comply with the requirements of Section 2.05 .

     If no election as to the Type of Borrowing is specified, then the requested Borrowing shall be an ABR Borrowing. If no Interest Period is specified with respect to any requested Eurodollar Loan, then Borrower shall be deemed to have selected an Interest Period of one month’s duration. Promptly following receipt of a Borrowing Request in accordance with this Section, the Administrative Agent shall advise each Lender of the details thereof and of the amount of such Lender’s Loan to be made as part of the requested Borrowing. Notwithstanding the foregoing, Borrower acknowledges that Borrower shall bear all risk of loss resulting from disbursements made upon telephonic request.

     SECTION 2.04 [Intentionally Left Blank].

     SECTION 2.05 Funding of Borrowings.

     (a) Each Lender shall make each Loan to be made by it hereunder on the proposed date thereof by wire transfer of immediately available funds by 2:00 p.m., New York City time, to the account of the Administrative Agent most recently designated by it for such purpose by notice to the Lenders. The Administrative Agent will make such Loans available to Borrower by promptly crediting the amounts so received, in like funds, to an account of Borrower maintained with the Administrative Agent and designated by Borrower in the applicable Borrowing Request.

     (b) Unless the Administrative Agent shall have received notice from a Lender prior to the proposed date of any Borrowing that such Lender will not make available to the Administrative Agent such Lender’s share of such Borrowing, the Administrative Agent may assume that such Lender has made such share available on such date in accordance with paragraph (a) of this Section and may, in reliance upon such assumption, make available to Borrower a corresponding amount. If a Lender has not in fact made its share of the applicable Borrowing available to the Administrative Agent, then the applicable Lender and Borrower severally agree to pay to the Administrative Agent forthwith on demand such corresponding amount with interest thereon, for each day from and including the date such amount is made available to Borrower to but excluding the date of payment to the Administrative Agent, at (i) in the case of such Lender, the greater of the Federal Funds Effective Rate and a rate determined by the Administrative Agent in accordance with banking industry rules on interbank compensation or (ii) in the case of Borrower, the interest rate applicable to ABR Loans. If such Lender pays such amount to the Administrative Agent, then such amount shall constitute such Lender’s Loan included in such Borrowing.

     SECTION 2.06 Interest Elections.

     (a) Each Loan initially shall be of the Type specified in the applicable Borrowing Request and, in the case of a Eurodollar Borrowing, shall have an initial Interest Period as specified in such Borrowing Request. Thereafter, Borrower may elect to convert such Borrowing to a different Type or to continue such Borrowing and, in the case of a Eurodollar Borrowing, may elect Interest Periods therefor, all as provided in this Section. Borrower may elect different options with respect to different portions of the affected Borrowing, in which case

each such portion shall be allocated ratably among the Lenders holding the Loans comprising such Borrowing, and the Loans comprising each such portion shall be considered a separate Borrowing.

     (b) To make an election pursuant to this Section, Borrower shall notify the Administrative Agent of such election by telephone (a) in the case of a Eurodollar Borrowing, not later than 11:00 a.m., New York City time, two Business Days before the proposed Borrowing and (b) in the case of an ABR Borrowing, not later than noon, New York City time, on the date of the proposed Borrowing. Each such telephonic Interest Election Request shall be irrevocable and shall be confirmed by hand delivery or telecopy to the Administrative Agent on the same day as such telephonic request of a written Interest Election Request in a form approved by the Administrative Agent and signed by Borrower.

     (c) Each telephonic and written Interest Election Request shall specify the following information:

     (i) the Borrowing to which such Interest Election Request applies and, if different options are being elected with respect to different portions thereof, the portions thereof to be allocated to each resulting Borrowing (in which case the information to be specified pursuant to clauses (iii) and (iv) below shall be specified for each resulting Borrowing);

     (ii) the effective date of the election made pursuant to such Interest Election Request, which shall be a Business Day;

     (iii) whether the resulting Borrowing is to be an ABR Borrowing or a Eurodollar Borrowing; and

     (iv) if the resulting Borrowing is a Eurodollar Borrowing, the Interest Period to be applicable thereto after giving effect to such election, which shall be a period contemplated by the definition of the term “Interest Period”.

     If any such Interest Election Request requests a Eurodollar Borrowing but does not specify an Interest Period, then Borrower shall be deemed to have selected an Interest Period of one month’s duration.

     (d) Promptly following receipt of an Interest Election Request, the Administrative Agent shall advise each Lender of the details thereof and of such Lender’s portion of each resulting Borrowing.

     (e) If Borrower fails to deliver a timely Interest Election Request with respect to a Eurodollar Borrowing prior to the end of the Interest Period applicable thereto, then, unless such Borrowing is repaid as provided herein, at the end of such Interest Period such Borrowing shall be converted to an ABR Borrowing. Notwithstanding any contrary provision hereof, if an Event of Default has occurred and is continuing and the Administrative Agent, at the request of the Required Lenders, so notifies Borrower, then, so long as an Event of Default is continuing (i) no outstanding Borrowing may be converted to or continued as a Eurodollar Borrowing and (ii)

unless repaid, each Eurodollar Borrowing shall be converted to an ABR Borrowing at the end of the Interest Period applicable thereto.

     SECTION 2.07 Termination of Commitments. The Commitments shall terminate at 3:00 p.m., New York City time, on the Effective Date.

     SECTION 2.08 Repayment of Loans; Evidence of Debt.

     (a) Borrower shall repay the Term Loans as follows:

To the extent not previously paid, all Term Loans shall be due and payable on the Term Loan Maturity Date.

     (b) Borrower shall repay the entire unpaid principal amount of each Bridge Loan of such Lender on the Bridge Loan Maturity Date.

     (c) Each Lender shall maintain in accordance with its usual practice an account or accounts evidencing the indebtedness of Borrower to such Lender resulting from each Loan made by such Lender, including the amounts of principal and interest payable and paid to such Lender from time to time hereunder.

     (d) The Administrative Agent shall maintain accounts in which it shall record (i) the amount of each Loan made hereunder, the Type thereof and the Interest Period applicable thereto, (ii) the amount of any principal or interest due and payable or to become due and payable from Borrower to each Lender hereunder and (iii) the amount of any sum received by the Administrative Agent hereunder for the account of the Lenders and each Lender’s share thereof.

     (e) The entries made in the accounts maintained pursuant to paragraph (b) or (c) of this Section shall be prima facie evidence of the existence and amounts of the obligations recorded therein; provided that the failure of any Lender or the Administrative Agent to maintain such accounts or any error therein shall not in any manner affect the obligation of Borrower to repay the Loans in accordance with the terms of this Agreement.

     SECTION 2.09 Prepayment of Loans.

     (a) Borrower shall have the right at any time and from time to time to prepay any Borrowing in whole or in part, subject to the requirements of this Section. All prepayments under this Section 2.09(a) shall be applied first to payment of the scheduled installment payments in respect of the Term Loans in their order of maturity, with the balance to be applied to the unpaid principal balance of the Bridge Loans.

     (b) Subject to Section 2.09(g) below, following the date of receipt by Borrower or any of its Subsidiaries of any Net Asset Sale Proceeds after the Effective Date, Borrower shall prepay the Term Loans in an aggregate amount equal to fifty percent (50%) of the amount of such Net Asset Sale Proceeds, rounded to the nearest $100,000, such prepayment to be made no later than the 30th day following the date of receipt by Borrower or any of its Subsidiaries of such Net Asset Sale Proceeds. All prepayments under this Section 2.09(b) shall be applied to payment of the scheduled installment payments in respect of the Term Loans in their order of maturity.

     (c) Subject to Section 2.09(g) below, no later than five Business Days following date of receipt by Borrower of any cash proceeds (net of reasonable attorneys’ fees, investment banking fees, accountants’ fees, underwriting discounts and commissions and other reasonable customary fees and expenses actually incurred in connection with the incurrence of the applicable Indebtedness) from a Public Debt Offering, Borrower shall prepay the Bridge Loans in an aggregate amount equal to 100% of such net cash proceeds.

     (d) Concurrently with any prepayment of the Loans pursuant to Sections 2.09(b) through 2.09(c) , Borrower shall deliver to the Administrative Agent a certificate of an authorized officer demonstrating the calculation of the amount of the applicable net proceeds. In the event that Borrower shall subsequently determine that the actual net cash amount required to be prepaid pursuant to this Section exceeded the amount set forth in such certificate, the Borrower shall promptly make an additional prepayment of the Loans, and the Borrower shall concurrently therewith deliver to the Administrative Agent a certificate of an authorized officer demonstrating the derivation of such excess. Each mandatory prepayment shall be made without premium or penalty other than the payment of all accrued and unpaid interest on the Loans prepaid and any applicable breakage fees and funding losses pursuant to this Agreement.

     (e) Any amount required to be paid pursuant to Sections 2.09(b) through 2.09(c) shall be applied first to prepay the ABR Loans to the full extent thereof before application to the Eurodollar Loans, in each case in a manner that minimizes the amount of any applicable breakage fees and funding losses pursuant to this Agreement.

     (f) Borrower shall notify the Administrative Agent by telephone (confirmed by telecopy) of any prepayment hereunder (i) in the case of prepayment of a Eurodollar Loan, not later than 1:00 p.m., New York City time, three Business Days before the date of prepayment or (ii) in the case of prepayment of an ABR Loan, not later than 1:00 p.m., New York City time, one Business Day before the date of prepayment. Each such notice shall be irrevocable and shall specify the prepayment date, the principal amount of each Borrowing or portion thereof to be prepaid. Promptly following receipt of any such notice, the Administrative Agent shall advise

the Lenders of the contents thereof. Each partial prepayment of any Borrowing shall be in an amount equal to $1,000,000 or an increment of $100,000 in excess thereof.

     (g) Notwithstanding the provisions of this Section, no mandatory prepayment of the Loans shall be required to the extent that such prepayment would result in the occurrence of a “Default” or “Event of Default” under that certain Credit Agreement dated as of May 5, 2005 executed by and among Borrower and M-I L.L.C., a Delaware limited liability company (collectively as the borrowers), COMERICA BANK, as Administrative Agent, and certain financial institutions therein named, as amended by instrument dated as of August 22, 2006 (but without consideration of any additional amendment or modification unless the same shall have been approved in writing by the Required Lenders).

     SECTION 2.10 Fees.

     (a) Borrower agrees to pay to the Administrative Agent for the account of each Lender an upfront fee in an amount equal to 0.075% times the amount of each respective Lender’s Term Loan Commitment, such upfront fee to be due and payable on the Effective Date.

     (b) Unless all of the Bridge Loans shall have been paid in full on or before January 1, 2009, Borrower agrees to pay to the Administrative Agent for the account of each Lender a fee in an amount equal to 0.35% times the amount of the outstanding principal balance, as of 3:00 p.m., New York City time, of the Bridge Loans owed to each respective Lender, such fee to be due and payable on January 2, 2009.

     (c) All fees payable hereunder shall be paid on the dates due, in immediately available funds, to the Administrative Agent for distribution to the Lenders entitled thereto. Fees paid shall not be refundable under any circumstances, absent manifest error in the calculation or assessment of such fees.

     SECTION 2.11 Interest.

     (a) The Loans comprising each ABR Borrowing shall bear interest at the lesser of (i) the Alternate Base Rate plus the Applicable Margin or (ii) the Ceiling Rate.

     (b) The Loans comprising each Eurodollar Borrowi