Diamond Offshore Drilling, Inc. is an offshore drilling contractor. The company is headquartered in Katy, Texas, United States, and has major offices in Australia, Brazil, Mexico, Scotland, Singapore, and Norway.[1]
It operates 15 drilling rigs including 11 semi-submersible platforms and 4 drillships.[1] In September 2024, Noble Corporation completed its acquisition of the Texas firm.[2]
History
In the early 1960s, Brewster-Bartle, an onshore drilling company, filed bankruptcy. In 1964, Don McMahon acquired Brewster-Bartle from its bank creditors and formed Diamond M Drilling Company, named after Diamond M Acres, his ranch near Simonton, Texas, which then expanded into offshore drilling.
In 1970, Diamond M became a public company via an