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Part of Seadrill Ltd., Seadrill Management Ltd. provides management and operational services relating to various drilling units. The company is based in London, UK. The CEO of the British company is Simon William Johnson.

Seadrill is a leading offshore deepwater drilling company, aiming to be the customers' most important partner in making oil and gas available in a safe and cost-effective manner. The company operates a versatile fleet of 50 units that comprises drillships, jack-up rigs, semi-submersible rigs and tender rigs for operations in shallow to ultra-deepwater areas in harsh environment and benign environments.

Part of Seadrill Ltd., Seadrill Tellus Ltd. is a Bermudian company that provides offshore deepwater drilling services.

Seadrill Hyperion Ltd. engages in the exploration of oil and gas. The company is headquartered in Hamilton, Bermuda.

Seadrill Rhea Ltd. engages in the exploration of oil and gas. The company is headquartered in Hamilton, Bermuda.

Seadrill Proteus Ltd. engages in the distribution of oil and gas. The company is headquartered in Hamilton, Bermuda.

Seadrill Dione Ltd. engages in providing onshore and offshore oil and gas services. The company is headquartered in Hamilton, Bermuda.

Part of Seadrill Ltd., Seadrill UK Support Services Ltd. is a company that provides human resource, payroll, and accounting services. The company is based in Aberdeen, UK and was founded in 2012.

Seadrill T-16 Ltd. owns, operates and acquires offshore drilling rigs. The company is headquartered in Hamilton, Bermuda.

Part of SeaMex Ltd., Seadrill Mexico UK Ltd. is a company that engages in renting machinery and equipment. Seadrill Mexico UK Ltd. is based in London, UK. Founded in 2013.

Seadrill UK Operations Ltd. engages in the provision Of offshore drilling services to the UK Oil and gas industry. The company was founded on May 5, 1993 and is headquartered in Aberdeer, the United Kingdom.

Scorpion Offshore, Inc. provides offshore contract drilling services. The company is headquartered in Houston, TX.

Asia Offshore Drilling Ltd. owns and operates a fleet of modern high specification jack-up rigs. It intends to provide drilling services in shallow-water oil and gas exploration and production areas through the world. Asia Offshore Drilling was founded on October 29, 2010 and is headquartered in Hamilton, Bermuda.

Smedvig Ltd. specializes in the operation and management of mobile drilling rigs for offshore oil and gas exploration. The private company is based in London, UK. and has subsidiaries in United Kingdom.

Noble Drilling Norge AS provides offshore drilling services. Its fleet consists of deepwater semi-submersibles, drilling barges and jack-up rigs. The company was founded in 1972 and is headquartered in Stavanger, Norway.