Transocean Ltd. provides offshore contract drilling services for oil and gas wells worldwide. It offers deepwater and harsh environment drilling, oil and gas drilling management, and drilling engineering and project management services. The company also explores, develops, and produces oil and gas properties located primarily in the United States offshore Louisiana and Texas, and in the United Kingdom sector of the North Sea. As of March 31, 2010, it owned and operated 140 mobile offshore drilling units comprising 46 high-specification floaters, 26 midwater floaters, 10 high-specification jackups, 55 standard jackups, and 3 other rigs. The company was founded in 1953 and is based in Vernier, Switzerland.