Seadrill Limited

Seadrill owns and operates drilling rigs that oil and gas companies rent to drill for oil and gas in the ocean. The company's rigs include drillships and semi-submersible platforms that can work in deep water as well as jackup rigs for shallower areas. They serve major oil companies, government-owned oil companies, and smaller independent oil firms around the world. Seadrill essentially leases specialized equipment and expertise to help companies extract oil and gas from offshore locations.