National Oilwell Varco Claim Listing Return to Directory Rating (average) (0) Business Genre Manufacturing, Petroleum Business Website Address nationoil.com Business Address, City 778 Circle Dr, Casper ZIP Code 82601 Business Phone Number 3072373100 Business Fax 3072372546 Ratings There are no reviews yet. Please login to leave a review. Please login to claim this listing. Username*: Email*: Password*: Log in | Lost your password?