Per Winther Wullf

Eastern Drilling AS owns and operates offshore oil rigs and drilling vessels. It is an offshore drilling company that develops semi-submersible drilling rigs for operations in harsh and deep water environments. The company was founded on March 4, 1997 and is headquartered in Stavanger, Norway.

Seadrill Ltd. engages in the provision of offshore drilling services to the oil and gas industry. It operates through the following segments: Harsh Environment, Floaters, Jack-up rigs, and Other. The Harsh Environment segment include both semi-submersibles and jack-ups that have a number of design modifications to be able to handle to weather conditions as seen in the North Sea and Canada. The Floaters segment encompasses drilling, completion, and maintenance of offshore exploration and production wells. the Jack-up Rigs segment includes drilling contracts relate to jack-up rigs for operations in harsh and benign environments in shallow water. The Other segment represents management services to third parties and related parties. The company was founded on May 10, 2005 and is headquartered in Hamilton, Bermuda.

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.

Sevan Drilling ASA operates as an offshore drilling contractor, which engages in building and operating ultra deepwater drill rigs. It operates through three business segments: Operations, Construction in Progress and Other. The company was founded on May 31, 2006 and is headquartered in Oslo, Norway.

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

Sevan Drilling Ltd. engages in the provision of offshore drilling services. It engages in the rental and leasing of drilling rig on a bareboat basis. The company was founded on December 31, 2008 and is headquartered in Stavanger, Norway.

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.