National Oilwell Varco

National Oilwell Varco (NOV) is an American multinational corporation based in Greater Sharpstown, Houston, Texas, which manufactures land-based and offshore oil drilling rigs as well as all the major mechanical components for such rigs. The company also performs a number of services for the oil industry such as well and pipeline inspections and is one of the market leaders in supply chain management through their distribution network of over 700 locations. They are a worldwide leader in the design, manufacture and sale of equipment and components used in oil and gas drilling and production operations, the provision of oilfield services, and supply chain integration services to the upstream oil and gas industry.

Products include all the heavy hardware for oil well drilling as well as drilling instrumentation and controls and drilling power generation and control. Partial list of heavy hardware includes topdrives, rotarys, drawworks, derricks, BOP's (blowout preventers), mud pumps, riser equipment, and complete drilling rigs. Products also include instruments and controls required on the rig floor for the drilling operation. This includes sophisticated electronics for precise control. Cyberbase is a such sophisticated control system. Further, NOV produces control electronics for power generation and control of drilling motors, and MCC's (motor control centers) for AC motor control.

In 2008, the Houston Chronicle ranked National Oilwell Varco as the best company in Greater Houston, in 2007 the newspaper ranked National Oilwell Varco number 15.