Exhibit 31.2
I, Clay C. Williams, certify that:
1. I have reviewed this amendment number 1 to the annual report on Form 10-K /A of National Oilwell Varco, Inc.; and
2. Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report.
| Date: April 29, 2005 | By: | /s/ Clay C. Williams | ||
| Clay C. Williams | ||||
| Senior Vice President and Chief Financial Officer | ||||
