Transocean Ltd., together with its subsidiaries, provides offshore contract drilling services for oil and gas wells worldwide. It contracts its mobile offshore drilling rigs, related equipment, and work crews to drill oil and gas wells. As of February 14, 2022, the company had partial ownership interests in and operated a fleet of 37 mobile offshore drilling units, including 27 ultra-deep water and 10 harsh environment floaters. It serves integrated energy companies, government-owned or government-controlled oil companies, and other independent energy companies. The company was founded in 1926 and is based in Steinhausen, Switzerland.