definition for: #NationalOilwell

National Oilwell Varco, Inc. designs, manufactures, and sells equipment and components used in oil and gas drilling, completion, and production; and provides oilfield services to the upstream oil and gas industry worldwide. The company?s Rig Systems segment offers land rigs; offshore drilling equipment packages; and drilling rig components. This segment provides substructures, derricks, and masts; cranes; pipe lifting, racking, rotating, and assembly systems; fluid transfer technologies, such as mud pumps; pressure control equipment, such as blowout preventers; power transmission systems, such as drives and generators; and rig instrumentation and control systems. Its Rig Aftermarket segment offers spare parts; and repair and rental services, as well as technical support, field and first well support, field engineering, and customer training services. The company?s Wellbore Technologies segment designs, manufactures, rents, and sells various equipment and technologies used to perform drilling operations. This segment also provides solids control and waste management equipment and services, drilling fluids, drill pipes, wired pipes, tubular inspection and coating services, instrumentation, downhole tools, and drill bits. Its Completion and Production Solutions segment offers equipment and technologies for hydraulic fracture stimulation, such as pressure pumping trucks and pumps, blenders, sanders, hydration units, injection units, flowlines, manifolds, and wellheads; well intervention, including coiled tubing units, coiled tubing, and wireline units and tools; offshore production, including composite pipe, process equipment, floating production systems, and subsea production technologies; and onshore production, including surface transfer and progressive cavity pumps, positive displacement reciprocating pumps, pressure vessels, and artificial lift systems. The company was founded in 1862 and is headquartered in Houston, Texas.