National Oilwell Varco is the leading provider for the worldwide oil and gas industry and has been dedicated to providing the highest quality oilfield products and services for more than 140 years. National Oilwell Varco ......National Oilwell Varco is the leading provider for the worldwide oil and gas industry and has been dedicated to providing the highest quality oilfield products and services for more than 140 years. National Oilwell Varco is the single source for all of your rig equipment, integrated systems, downhole tools, and supply chain solutions. From a spare part to a comprehensive drilling system — and from a generic valve to a fully integrated supply chain process, National Oilwell Varco delivers unlimited customer solutions. By constantly developing and acquiring new technologies and services to better serve future customer requirements, National Oilwell Varco will continue to be the premier source for diversified products and services worldwide. National Oilwell Varco has a broad range of equipment, systems and components for Land Rigs and Semi-submersible Rigs worldwide. Please click on the images below to view the components for either Land or Semi-submersible Rigs.