Transocean Ltd. announced that the company has reached definitive agreements to sell 38 shallow water drilling rigs to Shelf Drilling International Holdings, Ltd. ("Shelf Drilling") for approximately $1.05 billion. The list of rigs to be acquired by Shelf Drilling in the transactions is provided as Appendix A. Shelf Drilling is a newly formed company sponsored equally by Castle Harlan, Inc., CHAMP Private Equity and Lime Rock Partners.

The sales price includes approximately $855 million in cash, subject to working capital and other closing adjustments, and $195 million in seller financing. Seller financing will be in the form of preference shares issued by an affiliate of Shelf Drilling. As a component of the agreement, Transocean will provide various transition support services to Shelf Drilling for a period subsequent to the closing of the transactions. The transactions are expected to close in the fourth quarter of 2012, subject to certain conditions.

"This agreement marks an important milestone in our asset strategy to increase our focus on high-specification floaters and jackups, improving our long-term competitiveness," said Steven L. Newman, President and Chief Executive Officer of Transocean Ltd.

David Mullen, President and Chief Executive Officer of Shelf Drilling, added, "This is an exciting opportunity with great potential. Our strategy will be to maintain an exclusive focus on shallow water drilling, leveraging decades of complementary industry experience of management, three leading investment firms, and our employees, to provide best in class drilling operations for our customers."

Related to the Shelf Drilling transactions, Transocean expects its third quarter 2012 results to include a non-cash charge related to impairment of the long-lived assets or goodwill allocable to these assets. As of June 30, 2012, the aggregate carrying amount of the long-lived assets included in the transactions was approximately $1.4 billion. The sales price includes approximately $200 million related to the net current assets associated with the transactions. Transocean's total aggregate consolidated goodwill as of June 30, 2012 was $3.1 billion, a portion of which is expected to be allocated to the assets included in the transactions.

About Transocean

Transocean is a leading international provider of offshore contract drilling services for oil and gas wells. The company specializes in technically demanding sectors of the global offshore drilling business with a particular focus on deepwater and harsh environment drilling services, and believes that it operates one of the most versatile offshore drilling fleets in the world.

At September 10, 2012, Transocean owns or has partial ownership interests in, and operates a fleet of, 115 mobile offshore drilling units consisting of 48 High-Specification Floaters (Ultra-Deepwater, Deepwater and Harsh-Environment drilling rigs), 25 Midwater Floaters, nine High-Specification Jackups, 32 Standard Jackups and one swamp barge. Included in the 115 drilling units, the company has 32 Standard Jackups and one swamp barge classified as discontinued operations. An additional 12 Standard Jackups have been classified as held for sale. We have two Ultra-Deepwater Drillships and three High-Specification Jackups under construction.