Diamond Offshore Drilling, Inc. is a global offshore oil and gas drilling contractor. The Company has a fleet of 44 offshore drilling rigs, consisting of 32 semisubmersibles, seven jack-ups and five dynamically positioned drillships, four of which are under construction. The Company's jackups include Ocean King, Ocean Nugget, Ocean Scepter, Ocean Spartan, Ocean Spur, Ocean Summit and Ocean Titan. The Company's Deepwater Semisubmersibles include Ocean Alliance, Ocean America, Ocean Apex, Ocean Onyx, Ocean Valiant, and Ocean Star. Ultra-Deepwater Semisubmersibles include Ocean Valor, Ocean Courage, Ocean Monarch, Ocean Baroness, and Ocean Confidence. Ultra-Deepwater Drillships include Ocean BlackLion, Ocean BlackRhino, Ocean BlackHornet, and Ocean Clipper. Mid-Water Semisubmersibles includes Ocean Winner, Ocean Quest, Ocean Concord, Ocean Guardian, Ocean Whittington, and Ocean Yorktown.