Davis Polk advised J.P. Morgan Securities LLC, Wells Fargo Securities, LLC, Citigroup Global Markets Inc., HSBC Securities (USA) Inc. and SunTrust Robinson Humphrey, Inc. as joint book-running managers in connection with the SEC-registered offering by Diamond Offshore Drilling, Inc. of $250 million principal amount of its 3.45% senior notes due 2023 and $750 million principal amount of its 4.875% senior notes due 2043.

Based in Houston, Texas, Diamond Offshore Drilling is a leader in offshore drilling, providing contract drilling services to the energy industry around the globe with a fleet of 45 offshore drilling rigs, including seven rigs under construction.

The Davis Polk corporate team included partner Richard A. Drucker, associate Melissa Glass and law clerk Amir Nezar. Counsel Loyti Cheng and associate Kevin J. Klesh provided environmental advice. Partner Po Sit and associate Ameya V. Bapat provided tax advice. Rosemarie Melendez was the legal assistant for the transaction. All members of the Davis Polk team are based in the New York office.