What was the name of the oil rig involved in the 2010 Deepwater Horizon disaster?

The oil rig involved in the 2010 Deepwater Horizon disaster was named Deepwater Horizon.

Deepwater Horizon was a dynamically positioned, semi-submersible offshore drilling rig operated by Transocean. It was drilling the Macondo well for BP in the Gulf of Mexico when a blowout occurred on April 20, 2010. Explosive hydrocarbons reached the rig, causing a fire that killed 11 workers and destroyed the platform.

The rig sank two days later, and oil flowed from the damaged well for 87 days before it was permanently capped. The event caused one of the largest accidental marine oil spills in petroleum industry history and led to extensive environmental damage along the Gulf Coast.

Deepwater Horizon was the rig, while Macondo was the well and BP was the principal lease operator. These names are often confused. The disaster also prompted investigations, regulatory changes, and major legal settlements involving the companies connected with the well.