Instantánea de Transocean
Transocean specializes in deepwater drilling and it isn't afraid of harsh environments. It operates in the world's major offshore oil-producing regions, including Africa, Asia, Brazil, Canada, India, the Middle East, the Gulf of Mexico, and the North Sea. The company has a fleet of 138 mobile offshore drilling units (72 semisubmersibles and drillships, 63 jackup rigs, and three other rigs). Transocean's other operations include management of third-party drilling services. Major customers include BP and Chevron. Although Transocean has a major presence in the Houston oil patch, the company is domiciled in Switzerland for tax purposes.