Diamond Offshore Drilling Inc. (NYSE: DO) priced a public offering of $1 billion senior notes consisting of $250 million 3.45% senior notes due 2023 and $750 million 4.875% senior notes due 2043.

Closing of the transaction is scheduled for Nov. 5, subject to customary closing conditions. Net proceeds will be used for general corporate purposes, including the redemption, repurchase or retirement of its 5.15% senior notes due 2014 and 4.875% senior notes due 2015.

J.P. Morgan Securities LLC, Wells Fargo Securities LLC, Citigroup Global Markets Inc., HSBC Securities (USA) Inc., and SunTrust Robinson Humphrey Inc. are joint book-running managers.

The offering is being made only through the prospectus supplement and accompanying base prospectus, which is part of an effective shelf registration statement filed with the Securities and Exchange Commission on March 9, 2012.

Diamond Offshore Drilling Inc. operates as an offshore oil and gas drilling contractor worldwide. The company is headquartered in Houston.