Diamond Offshore Drilling today announced that a subsidiary has entered into a contract with Jurong Shipyard of Singapore to build a moored semisubmersible rig.

Total cost for the project is expected to be approximately $370 million, including commissioning, spares and project management, but excluding capitalized interest.

The rig, to be named the Ocean Apex, will be capable of operations in water depths up to 6,000 feet. Design specifications also include a variable deck load of 7,000 long tons, a maximum hook-load capacity of two million pounds, a 15K five-ram blowout preventer, crew quarters capacity for 140 personnel, and a deck area among the largest of any semisubmersible rig in the world, according to Diamond Offshore.

-We continue to see significant opportunities for moored deepwater units, as evidenced by the contract recently awarded to the Ocean Onyx, our other deepwater semisubmersible currently under construction,” said Larry Dickerson, President and Chief Executive Officer of Diamond Offshore.

The company will construct the Ocean Apex utilizing an existing hull from a Diamond Offshore cold stacked unit.

-Upon delivery, we will have a rig that exceeds the specifications of a fourth-generation newbuild unit; however, it will have been constructed in approximately half the time and for a significantly lower cost. This addition to our fleet is consistent with Diamond Offshore’s long-term strategy of enhancing our fleet at attractive capital costs, Dickerson says.

The fleet
Diamond Offshore’s fleet of offshore drilling rigs consists of 30 semisubmersibles, seven jack-ups and one drillship, in addition to four ultra-deepwater drillships and two deepwater semisubmersibles currently under construction.