Education. Clay Williams has a B.S. degree in Civil/Geological Engineering from Princeton University and an MBA from the University of Texas at Austin.. National Oilwell Varco. Before Williams took on his current position of Chairman and CEO on June 2, 2014, he held a variety of other roles at the firm. National Oilwell Varco provides oilfield equipment, technologies, and expertise that answer the challenges of oil and gas customers worldwide with safety, efficiency, and reliability. Search. MYNOV is a single sign-on solution. Access multiple NOV applications and services with one login. Rig Technologies comprises three parts: Rig Equipment, Marine and Construction, and Aftermarket Operations. Our Rig Equipment team engineers and manufactures drilling rigs, advanced drilling equipment packages, and the related capital equipment (including top drives, iron roughnecks, drawworks, blowout preventers, mud pumps, risers, pipe handling, and power and control systems) necessary to