Press Release

HOUSTON--(BUSINESS WIRE)--Jan. 12, 2012-- Diamond Offshore Drilling, Inc.(NYSE:DO) announced today that it will issue a press release and host a conference call and webcast related to its fourth quarter 2011 operating results on Thursday, February 2, 2012. The conference call and webcast will include a discussion by management regarding the Company’s results of operation as well as an operating overview. The call will begin at 9:00 a.m. CST.

The news release and a live webcast of the conference call will be available online at the Company’s web site, http://www.diamondoffshore.com. The dial-in number to participate in this conference call is 800-247-9979. Those individuals calling from international locations may participate by dialing 973-321-1100. The conference ID number is 42885774.

A replay of the call will be available at http://www.diamondoffshore.com or by dialing 855-859-2056, or internationally, 404-537-3406. The telephone replay requires conference ID number 42885774 and will be available through February 12, 2012.

ABOUT DIAMOND OFFSHORE

Diamond Offshore provides contract drilling services to the energy industry and is a leader in deepwater drilling. Diamond Offshore’s fleet of offshore drilling rigs consists of 32 semisubmersibles, 13 jack-ups, and one drillship, in addition to three ultra-deepwater drillships currently under construction. For additional information and access to SEC filings, please visit the Company’s website at http://www.diamondoffshore.com.

Source: Diamond Offshore Drilling, Inc.

Diamond Offshore Drilling, Inc.
Darren Daugherty, 281-492-5370
Director, Investor Relations