SECURITIES AND EXCHANGE COMMISSION WASHINGTON, DC 20549 FORM 11-K ANNUAL REPORT PURSUANT TO SECTION 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934 (Mark One) [X] Annual report pursuant to Section 15(d) of the Securities Exchange Act of 1934 (No fee required, effective October 7, 1996) For the fiscal year ended DECEMBER 31, 2002 ------------------------------------------------ Or [ ] Transition report pursuant to Section 15(d) of the Securities Exchange Act of 1934 (No fee required) For the transition period from to -------------------- -------------------- Commission file number 1-12317 ---------------------------------------------------- A. Full title of the plan and the address of the plan, if different from that of the issuer named below NATIONAL-OILWELL RETIREMENT AND THRIFT PLAN -------------------------------------------- B. Name of issuer of the securities held pursuant to the plan and the address of its principal executive office NATIONAL-OILWELL, INC. -------------------------------------- 10000 RICHMOND AVENUE - -------------------------------------------------------------------------------- 6TH FLOOR - -------------------------------------------------------------------------------- HOUSTON, TEXAS 77042-4200 - --------------------------------------------------------------------------------

REQUIRED INFORMATION The National-Oilwell Retirement and Thrift Plan (the Plan) is subject to the requirements of the Employee Retirement Income Security Act of 1974 (ERISA). ITEM 4. In lieu of the requirements of Items 1, 2, and 3 of this Form 11-K, the following financial statements of the Plan, notes thereto, and the Report of Independent Auditors thereon are being filed in this Report: (a) Report of Independent Auditors (b) Statements of Net Assets Available for Benefits - December 31, 2002 and 2001 (c) Statement of Changes in Net Assets Available for Benefits - Year ended December 31, 2002; and (d) Notes to Financial Statements The Consent of Independent Auditors to the incorporation by reference of the foregoing financial statements in the Registration Statement on Form S-8 (No. 333-46459) pertaining to the Plan is being filed as Exhibit 23.1 to this Report.

NATIONAL-OILWELL RETIREMENT AND THRIFT PLAN FINANCIAL STATEMENTS AND SCHEDULES DECEMBER 31, 2002 TABLE OF CONTENTS

Report of Independent Auditors ................................................... 4 Audited Financial Statements Statements of Net Assets Available for Benefits ......................... 5 Statement of Changes in Net Assets Available for Benefits ............... 6 Notes to Financial Statements ........................................... 7 Supplemental Schedule Schedule H, Line 4(i)--Schedule of Assets (Held At End of Year) ......... 11 Signature ........................................................................ 12 Exhibit Index .................................................................... 13 Exhibit 23.1--Consent of Independent Certified Public Accountants Exhibit 99.1--Certification Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002

Report of Independent Auditors The Benefit Plan Administrative Committee National-Oilwell Retirement and Thrift Plan We have audited the accompanying statements of net assets available for benefits of the National-Oilwell Retirement and Thrift Plan as of December 31, 2002 and 2001, and the related statement of changes in net assets available for benefits for the year ended December 31, 2002. These financial statements are the responsibility of the Plan's management. Our responsibility is to express an opinion on these financial statements based on our audits. We conducted our audits in accordance with auditing standards generally accepted in the United States. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement. An audit includes examining, on a test basis, evidence supporting the amounts and disclosures in the financial statements. An audit also includes assessing the accounting principles used and significant estimates made by management, as well as evaluating the overall financial statement presentation. We believe that our audits provide a reasonable basis for our opinion. In our opinion, the financial statements referred to above present fairly, in all material respects, the net assets available for benefits of the Plan at December 31, 2002 and 2001, and the changes in its net assets available for benefits for the year ended December 31, 2002, in conformity with accounting principles generally accepted in the United States. Our audits were performed for the purpose of forming an opinion on the financial statements taken as a whole. The accompanying supplemental schedule of assets (held at end of year) as of December 31, 2002, is presented for purposes of additional analysis and is not a required part of the financial statements but is supplementary information required by the Department of Labor's Rules and Regulations for Reporting and Disclosure under the Employee Retirement Income Security Act of 1974. This supplemental schedule is the responsibility of the Plan's management. The supplemental schedule has been subjected to the auditing procedures applied in our audits of the financial statements and, in our opinion, is fairly stated in all material respects in relation to the financial statements taken as a whole. /s/ Ernst & Young LLP Houston, TX June 12, 2003 -4-

National-Oilwell Retirement and Thrift Plan Statements of Net Assets Available for Benefits

DECEMBER 31, 2002 2001 ------------- ------------- ASSETS Cash $ -- $ 475,754 Accrued investment income 621 431 Investments 111,825,776 113,475,228 ------------- ------------- Total assets 111,826,397 113,951,413 LIABILITIES Cash overdraft 27,016 -- ------------- ------------- Total liabilities 27,016 -- ------------- ------------- Net assets available for benefits $ 111,799,381 $ 113,951,413 ============= =============
See accompanying notes. -5-

National-Oilwell Retirement and Thrift Plan Statement of Changes in Net Assets Available for Benefits Year Ended December 31, 2002

Additions: Employer contributions $ 8,182,013 Participant contributions 7,031,849 Participant rollovers 238,371 Investment income 958,067 -------------- Total additions 16,410,300 Deductions: Benefits paid to participants 8,677,772 Administrative expenses 42,429 Net depreciation in fair value of investments 9,842,131 -------------- Total deductions 18,562,332 -------------- Net decrease (2,152,032) Net assets available for benefits at: Beginning of year 113,951,413 -------------- End of year $ 111,799,381 ==============
See accompanying notes. -6-

National-Oilwell Retirement and Thrift Plan Notes to Financial Statements December 31, 2002 1. DESCRIPTION OF PLAN The following description of the National-Oilwell Retirement and Thrift Plan (the "Plan") is provided for general information only. Participants should refer to the Summary Plan Description for a more complete description of the Plan's provisions, a copy of which is available from National-Oilwell, L.P. (the "Company"). GENERAL The Plan was established effective April 1, 1987 for the benefit of the employees of the Company. The Plan is a defined contribution plan covering substantially all domestic employees who have completed at least six months of service. The Plan is subject to the provisions of the Employee Retirement Income Security Act of 1974 ("ERISA"). Effective January 1, 2002, the Plan was amended and restated to conform with certain statutory changes and to change certain administrative provisions. The Plan has submitted the amendments to the Internal Revenue Service and applied for a new determination letter. CONTRIBUTIONS Participants may make both pretax and after-tax contributions to the Plan. The minimum contribution is 1% of compensation and the maximum contribution is 18% (both pretax and after-tax combined). Effective January 1, 2002, the Company will match 100% of the first 3% and 50% of the next 2% of each participant's contribution. Prior to January 1, 2002, the Company's matching contributions were discretionary. The Company's other discretionary contribution to the Plan, the Employer Retirement Contribution ("Retirement"), is allocated to participants' accounts based on their years of service. The second discretionary contribution, the Employer Medical Savings Contribution ("MSA"), was established to accumulate assets for payment of medical insurance premiums after retirement, and is allocated to the participants' accounts based on years of service. Effective January 1, 2002, the MSA contribution was discontinued. Each participant may direct the trustee to invest both the participant's and the Company's contributions in one or more of the investment options offered by the Plan. -7-

National-Oilwell Retirement and Thrift Plan Notes to Financial Statements (continued) 1. DESCRIPTION OF PLAN (CONTINUED) VESTING Participants are immediately vested in participant and employer contributions and the related earnings which have been credited to their accounts. BENEFIT PAYMENTS The Plan pays lump-sum benefits on retirement, disability, death, or termination of employment. In-service withdrawals, subject to certain rules and restrictions, may also be made from all but the Retirement and MSA account balances. PARTICIPANT LOANS The Plan includes a loan provision that permits participants to borrow up to the lesser of $50,000 or 50% of the total value of their Plan assets. The loans are payable in principal installments plus interest at prime plus 1% through payroll deductions and are due in one to five-year terms. ADMINISTRATIVE EXPENSES Certain administrative expenses are paid from the Plan's assets. All other Plan expenses are paid by the Company. PLAN TERMINATION Although it has not expressed any intent to do so, the Company has the right under the Plan to discontinue contributions at any time and to terminate the Plan subject to the provisions of ERISA. Participants are 100% vested in their accounts in any event. Assets would be distributed to participants as prescribed by ERISA. 2. SUMMARY OF ACCOUNTING POLICIES BASIS OF ACCOUNTING The accompanying financial statements of the Plan have been prepared on the accrual basis of accounting in accordance with accounting principles generally accepted in the United States. Benefit payments to participants are recorded upon distribution. -8-

National-Oilwell Retirement and Thrift Plan Notes to Financial Statements (continued) 2. SUMMARY OF ACCOUNTING POLICIES (CONTINUED) USE OF ESTIMATES The preparation of financial statements in conformity with accounting principles generally accepted in the United States requires management to make estimates that affect the reported amounts in the financial statements and accompanying notes and schedule. Actual results could differ from those estimates. INVESTMENT VALUATION Short-term investments are stated at cost, which approximates fair value. Investments in common stock and mutual funds are stated at fair value, based on quotations obtained from national securities exchanges. Investments in common collective funds are based on quoted market values as determined by the issuer based on the fair value of the underlying investments. Participant loans are stated at cost, which approximates fair value. RISK AND UNCERTAINTIES The Plan provides for various investments in common stock, common collective funds, and mutual funds. Investment securities, in general, are exposed to various risks, such as interest rate, credit, and overall market volatility risk. Due to the level of risk associated with certain investment securities, it is reasonably possible that changes in the values of investment securities will occur in the near term and that such changes could materially affect the amounts reported in the statements of net assets available for benefits and participant account balances. -9-

National-Oilwell Retirement and Thrift Plan Notes to Financial Statements (continued) 3. INVESTMENTS American Express Trust Company serves as the Plan's trustee and holds all investments of the Plan. Individual investments that represent 5% or more of the Plan's net assets are as follows:

DECEMBER 31 2002 2001 ------------ ------------ American Express Trust Equity Index Fund II $ 12,116,031 $ 14,622,455 AIM Balanced Fund 6,435,757 7,664,718 AXP Growth Fund 11,052,635 14,529,189 Janus Worldwide Fund 7,030,521 7,983,415 American Express Trust Income Fund II 47,753,497 43,894,634 National-Oilwell common stock 9,265,052 8,848,471
During 2002, the Plan's investments (including investments bought, sold, and held during the year) appreciated (depreciated) in value as follows: Common stock $ 964,513 Common collective funds (1,362,726) Mutual funds (9,443,918) ------------ Net depreciation $ (9,842,131) ============
4. INCOME TAX STATUS The Plan has received a determination letter from the Internal Revenue Service (the "IRS") dated September 18, 1997, stating that the Plan is qualified under Section 401(a) of the Internal Revenue Code (the "IRC") and, therefore, the related trust is exempt from taxation. Subsequent to this issuance of the determination letter, the Plan was amended. Once qualified, the Plan is required to operate in conformity with the IRC to maintain its qualification. The plan administrator has indicated that it will take the necessary steps, if any, to maintain the Plan's qualified status. 5. SUBSEQUENT EVENT Effective January 1, 2003, the Plan was amended to allow pretax salary deferral contributions of 1% to 100% of compensation, subject to certain IRS limitations. After-tax contributions remain at 1% to 18% of compensation. -10-

National-Oilwell Retirement and Thrift Plan Schedule H, Line 4(i) - Schedule of Assets (Held At End of Year) December 31, 2002 EIN: 76-0488987 PN: 001

IDENTITY OF ISSUE, BORROWER, CURRENT LESSOR, OR SIMILAR PARTY DESCRIPTION OF INVESTMENT VALUE - ------------------------------- ------------------------------------------- ------------- *National-Oilwell, Inc. 424,224 shares of common stock $ 9,265,052 *American Express Trust Company American Express Trust Equity Index Fund II 12,116,031 *American Express Funds AXP Bond Fund 4,800,949 AIM Funds AIM Balanced Fund 6,435,757 Baron Funds Baron Asset Fund 4,558,512 *American Express Funds AXP Growth Fund 11,052,635 Davis Funds Davis New York Venture Fund 3,843,786 Janus Janus Worldwide Fund 7,030,521 *American Express Trust Company American Express Trust Income Fund II 47,753,497 *American Express Trust Company American Express Trust Money Market Fund I 493,084 *Participant loans Various maturities and interest rates ranging from 5.25% to 11.00% 4,475,952 ------------- $ 111,825,776 =============
*Party-in-interest -11-

SIGNATURE The Plan. Pursuant to the requirements of the Securities Exchange Act of 1934, the trustees (or other persons who administer the employee benefit plan) have duly caused this annual report to be signed on its behalf by the undersigned hereunto duly authorized. NATIONAL-OILWELL RETIREMENT AND THRIFT PLAN June 24, 2003 /s/ Daniel L. Molinaro - -------------------------- -------------------------------------------- Date Daniel L. Molinaro Member of the National-Oilwell Benefits Plan Administrative Committee -12-

EXHIBIT INDEX

Exhibit Number Description - -------------- ----------- 23.1 Consent of Independent Auditors 99.1 Certification Pursuant to Section 906 of the Sarbanes-Oxley Act of 2002
-13-

EXHIBIT 23.1 CONSENT OF INDEPENDENT AUDITORS We consent to the incorporation by reference in the Registration Statement (Form S-8 No. 333-46459) pertaining to the National-Oilwell Retirement and Thrift Plan of our report dated June 12, 2003, with respect to the financial statements and schedule of the National-Oilwell Retirement and Thrift Plan included in this Annual Report (Form 11-K) for the year ended December 31, 2002. /s/ Ernst & Young LLP Houston, Texas June 18, 2003

EXHIBIT 99.1 CERTIFICATION PURSUANT TO 18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002 In connection with the Annual Report of the National-Oilwell Retirement and Thrift Plan (the "Plan") on Form 11-K for the year ended December 31, 2002, as filed with the Securities and Exchange Commission on June 24, 2003 (the "Report"), I, Daniel L. Molinaro, Member of the National-Oilwell Benefits Plan Administrative Committee, certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002 ("Section 906"), that: (1) The Report fully complies with the requirements of Section 13(a) of the Securities Exchange Act of 1934; and (2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Plan. June 24, 2003 /s/ Daniel L. Molinaro - --------------------- ------------------------------------------------- Date Daniel L. Molinaro Member of the National-Oilwell Benefits Plan Administrative Committee A signed original of this written statement required by Section 906 has been provided to the Plan and will be retained by the Plan and furnished to the Securities and Exchange Commission or its staff upon request.