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 drilling project management services, as well as logistics services. As of February 20, 2013, the company owned, had partial ownership interests in, and operated 82 mobile offshore drilling units, including 48 high-specification floaters, 25 midwater floaters, and 9 high-specification jackups, as well as had 6 ultra-deepwater drillships and 3 high-specification jackups under construction or under contract to be constructed. Transocean Ltd. was founded in 1953 and is based in Vernier, Switzerland.