Thunder Horse PDQ is a BP plc and ExxonMobil joint venture semi-submersible oil platform on location over the Mississippi Canyon Thunder Horse oil field (Block 778/822), in deepwater Gulf of Mexico, 150 miles (240 km) southeast of New Orleans, moored in waters of 1,840 metres (6,040 ft).

The hull was built by Daewoo Shipbuilding & Marine Engineering (DSME) in Okpo, South Korea, then loaded aboard the heavy lift ship MV Blue Marlin and transported to Kiewit Offshore Services in Ingleside, Texas, where it was integrated with its topsides modules that were built in Morgan City, La.

[6] The 15,813 nautical miles (29,286 km; 18,197 mi) journey around the Cape of Good Hope took nine weeks (63 days), from 23 July to 23 September 2004.

[11][10] The platform was fully righted about a week after Dennis, delaying commercial production initially scheduled for late 2005.

[12] During repairs, it was discovered that the underwater manifold was severely cracked due to poorly welded pipes.