Profile: National Oilwell design, manufacture and sell comprehensive systems and components used in oil and gas drilling and production, as well as provides supply chain integration services to the upstream oil and gas industry. Through our products and technology segment, we manufactures and assembles drawworks, mud pumps, power swivels, masts, derricks, sub-structures, drilling motors and specialized drilling tools. National Oilwell also provides electrical power systems, computer control systems and automation systems. In addition, we engineer and fabricate services to integrate its drilling products and deliver complete land drilling rigs and drilling modules for offshore applications.