Valaris Limited is an offshore drilling contractor headquartered in Houston, Texas, and incorporated in Bermuda. It is the largest offshore drilling and well drilling company in the world, and owns 52 rigs, including 36 offshore jackup rigs, 11 drillships, and 5 semi-submersible platform drilling rigs. In 2022, the company's largest customer was BP. This is the history of ensco not of Rowan which is nearly half of Valaris. The information in this article is completely wrong Wikipedia