Diamond Offshore Drilling, Inc. is a prominent offshore drilling contractor based in Katy, Texas, with offices in locations such as Australia, Brazil, Mexico, Scotland, Singapore, and Norway. Established in 1953 and publicly listed since 1970, the company specializes in contract drilling services for the energy industry, particularly in complex deepwater environments.

The company operates a fleet of 15 offshore drilling rigs, including 11 semi-submersible platforms and 4 drillships. These rigs are designed to support oil and gas companies in exploring and developing offshore hydrocarbon resources. Diamond Offshore primarily serves independent and government-owned oil companies around the world, reflecting its extensive global presence.

In 2024, Diamond Offshore was acquired by Noble Corporation, integrating its fleet and expertise into Noble�s operations. This acquisition represents a significant development in the offshore drilling sector, combining the strengths of both companies to enhance service offerings in the energy market.