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In 2010, Transocean was implicated in the Deepwater Horizon oil spill resulting from the explosion of one of its oil rigs in the Gulf of Mexico that was leased to BP. [19] In 2011, the company acquired Aker Drilling, which owned 4 harsh environment rigs used for drilling near Norway. [20]
The oil leak was discovered on the afternoon of 22 April 2010 when a large oil slick began to spread at the former rig site. [41] The oil flowed for 87 days. BP originally estimated a flow rate of 1,000 to 5,000 barrels per day [bbl/d] (160 to 790 m 3 /d).
Deepwater Horizon was an ultra-deepwater, dynamically positioned, semi-submersible offshore drilling rig [7] owned by Transocean and operated by the BP company. On 20 April 2010, while drilling in the Gulf of Mexico at the Macondo Prospect, a blowout caused an explosion on the rig that killed 11 crewmen and ignited a fireball visible from 40 miles (64 km) away. [8]
Transocean's Deepwater Horizon offshore oil rig exploded in the Gulf of Mexico more than four months ago, killing 11 of its crew and injuring 17. But the investigation into what happened on April ...
May 13 – Tony Hayward calls the oil spill "relatively tiny" in comparison with the size of the "ocean." [60] Transocean files in the U.S. District Court for the Southern District of Texas to limit its liability under the Limitation of Shipowner's Liability Act to just its interest in the Deepwater Horizon which it values at $26,764,083. [61]
Transocean Marianas was an Earl & Wright Sedco 700 design semi-submersible platform drilling unit capable of operating in harsh environments and water depths up to 7,000 feet (2,100 m) using a 47.6 cm (18.75 in), 15,000 psi blowout preventer (BOP), and a 53 cm (21 in) outside diameter (OD) marine riser.