National Oilwell Varco, Inc. (NOV) is engaged in providing design, manufacture and sale of equipment and components used in oil and gas drilling, completion and production operations. The Company also provides oilfield services to the upstream oil and gas industry. The Company operates through four segments: Rig Systems, Rig Aftermarket, Wellbore Technologies, and Completion & Production Solutions. Its Rig Systems segment makes and supports the capital equipment and integrated systems needed to drill oil and gas wells on land and offshore. Its Rig Aftermarket segment provides aftermarket products and services to support land and offshore rigs, and drilling rig components manufactured by the Company's Rig Systems segment. Its Wellbore Technologies segment sells and rents solids control equipment; and provides solids control, waste management and drilling fluids services. Its Completion & Production Solutions segment provides technologies for well completions and oil and gas production.