National Oilwell Varco, Inc. is an oilfield equipment manufacturer and technology provider. The Company operates through four segments: Rig Systems, Rig Aftermarket, Wellbore Technologies and Completion & Production Solutions. The Rig Systems segment makes and supports the capital equipment and integrated systems needed to drill oil and gas wells on land and offshore. The Rig Systems segment designs, manufactures and sells land rigs, offshore drilling equipment packages, and drilling rig components. The Rig Aftermarket segment provides aftermarket products and services to support a large installed base of land and offshore rigs, and drilling rig components manufactured by the Company's Rig Systems segment. The Wellbore Technologies segment designs, manufactures, rents and sells a range of equipment and technologies used to perform drilling operations. The Completion & Production Solutions segment integrates technologies for well completions and oil and gas production.