Exhibit 23.1
CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM
We consent to the incorporation by reference in the following Registration Statements of National Oilwell, Inc. and each related Prospectus of our reports dated March 7, 2005, with respect to the consolidated financial statements and schedule of National Oilwell, Inc., National Oilwell, Inc.’s management assessment of the effectiveness of internal control over financial reporting, and the effectiveness of internal control over financial reporting of National Oilwell, Inc., included in this Annual Report (Form 10-K) for the year ended December 31, 2004.
Form | Description | |
S-8 | Stock Award and Long Term Incentive Plan, Value Appreciation and Incentive Plan A and Value Appreciation and Incentive Plan B (No. 333-15859) | |
S-8 | National-Oilwell Retirement and Thrift Plan (No. 333-36359) | |
S-8 | Post Effective Amendment No. 3 to the Registration Statement on Form S-4 filed on Form S-8 pertaining to the Dreco Energy Services Ltd. Amended and Restated 1989 Employee Incentive Stock Option Plan, as amended, and Employment and Compensation Arrangements Pursuant to Private Stock Option Agreements (No. 333-21191) | |
S-8 | Post Effective Amendment No. 1 on Form S-8 to Registration Statement on Form S-4 pertaining to the IRI International Corporation Equity Incentive Plan (No. 333-36644) | |
S-4 | Registration Statement on Form S-4 for the registration of shares of common stock in conjunction with the merger with Varco International, Inc. (No. 333-119071) |
Houston, Texas
March 7, 2005