Development Driller III

Development Driller III is a fifth generation, Vanuatu-flagged dynamic positioning semi-submersible ultra-deepwater drilling rig owned by Transocean and operated under lease agreements by various petroleum exploration and production companies worldwide. The vessel is capable of drilling in water depths up to 7,500 feet (2,300 m) with drilling depth of 35,000 feet (11,000 m), upgradeable to 37,500 feet (11,400 m).[3]

Development Driller III, Q4000, Discoverer Enterprise on the site of the Deepwater Horizon oil spill on 18 May 2010
History
Name:	Development Driller III
Owner:	Transocean
Operator:	Transocean
Port of registry:	Vanuatu, Port Vila
Ordered:	12 January 2006
Builder:	Keppel AmFELS, Singapore
Laid down:	25 November 2006
Acquired:	22 May 2009
Identification:	ABS class no.:09172785 Call sign: YJVD2 DNV ID: 30254 IMO number: 8769121 MMSI number: 576281000
Status:	Operational
Notes:	[1]
General characteristics
Tonnage:	37,981 GT 23,513 DWT
Length:	117 m (384 ft)
Beam:	78 m (256 ft)
Draught:	19 m (62 ft)
Depth:	37 m (121 ft)
Deck clearance:	77.10 m (253.0 ft)
Propulsion:	8 × Caterpillar 3616 diesel engines
Capacity:	Diesel oil: 4,546.7 m3 (160,570 cu ft) Freshwater: 2,934.98 m3 (103,648 cu ft) Lube oil: 71.78 m3 (2,535 cu ft) Tank ballast: 21,891.81 m3 (773,102 cu ft) Other: 341.84 m3 (12,072 cu ft)
Crew:	200
Notes:	[2]

On May 2, 2010, Development Driller III started drilling a relief well on Macondo Prospect to stop massive oil spill caused by the explosion and subsequent loss of the Deepwater Horizon.[4]