Seadrill Ltd. engages in the provision of offshore drilling services. It owns and operates drillships, semi-submersibles and jack-ups. It operates through the following segments: Harsh Environment, Floaters, and Jack-Up Rigs. The Harsh Environment segment operates both semi-submersibles and jack-ups that have a number of design modifications to be able to handle harsh weather conditions. The Floaters segment encompasses its drillships and benign environment semi-submersible rigs. The Jack-Up Rigs segment operates mobile, self-elevating drilling platforms equipped with legs that are lowered to the seabed. The company was founded on May 10, 2005 and is headquartered in Hamilton, Bermuda.