Deepwater Horizon was once an ultra-deepwater, dynamically placed, semi-submersible offshore drilling rig owned via Transocean. Developed in 2001 in South Korea by using Hyundai Heavy Industries, the rig used to be commissioned by means of R&B Falcon (a later asset of Transocean), registered in Majuro, and leased to BP from 2001 except September 2013. In September 2009, the rig drilled the deepest oil good in historical past at a vertical depth of 35,050 ft (10,683 m) and measured depth of 35,055 feet (10,685 m) in the Tiber Oil subject at Keathley Canyon block 102, roughly 250 miles (four hundred km) southeast of Houston, in four,132 toes (1,259 m) of water.
On 20 April 2010, even as drilling at the Macondo Prospect, an uncontrollable blowout precipitated an explosion on the rig that killed 11 crewmen and ignited a fireball visible from forty miles (64 km) away. The fireplace was once inextinguishable and, two days later, on 22 April, the Horizon sank, leaving the good gushing on the seabed and inflicting the largest oil spill in U.S. Waters