Diamond Offshore Drilling, Inc. provides contract drilling services to the energy industry. As of December 31, 2016, the Company had a fleet of 24 offshore drilling rigs. As of December 31, 2016, its fleet consisted of four drillships, 19 semisubmersible rigs and one jack-up rig. Its fleet enables it to offer a range of services, primarily in the floater market, including ultra-deepwater, deepwater and mid-water. The principal markets for its offshore contract drilling services are the Gulf of Mexico, including the United States and Mexico; South America, principally offshore Brazil, and Trinidad and Tobago; Australia and Southeast Asia, including Malaysia, Indonesia and Vietnam; Europe, principally offshore the United Kingdom and Norway; East and West Africa; the Mediterranean, and the Middle East. The Company provides offshore drilling services to a customer base that includes independent oil and gas companies, and government-owned oil companies.