National-Oilwell, Inc. designs, manufactures and sells comprehensive systems and components used in oil and gas drilling and production. In addition, the Company provides supply chain integration services to the upstream oil and gas industry. National-Oilwell manufactures and assembles drilling machinery, including draw works, mud pumps and top drives, which are the major mechanical components of drilling rigs, as well as masts, derricks and substructures. The Company also provides electrical power systems, computer control systems and automation systems for drilling rigs. In addition, the Company provides engineering and fabrication services to integrate its drilling products and deliver complete land drilling and work over rigs, as well as drilling modules for mobile offshore drilling rigs or offshore drilling platforms.
(Source: 10-K) – less–ZoomInfo