Rowan Companies, Inc. was founded in 1923 and is headquartered in Houston, Texas. Rowan Companies, Inc. provides a range of onshore and offshore contract drilling services in the United States and internationally. As of December 31, 2009, Rowan Companies, Inc. provided contract drilling services through a fleet of 23 self-elevating mobile offshore drilling platforms and 29 deep-well land drilling rigs. Rowan Companies, Inc. performs contract drilling primarily in the Middle East, Texas, the Gulf of Mexico, and in the North Sea. Rowan Companies, Inc. also designs and manufactures drilling equipment in a range of sizes, including mud pumps, top drives, draw-works, rotary tables, and electrical components, such as variable-speed motors and drives for the offshore and onshore oil and gas drilling industry. In addition, Rowan Companies, Inc. manufactures heavy equipment, including large-wheeled front-end loaders, diesel-electric powered log stackers, and steel plate products.