GSF Development Driller II

GSF Development Driller II is a fifth generation, Vanuatu-flagged dynamic positioning semi-submersible ultra-deepwater drilling rig owned and operated by Transocean. The vessel is capable of drilling in water depths up to 7,500 ft (2,300 m) with drilling depth of 35,000 ft (11,000 m), upgradeable to 37,500 ft (11,400 m).[2]

History
Name:	GSF Development Driller II
Owner:	Transocean
Operator:	Transocean
Port of registry:	Vanuatu, Port Vila
Ordered:	2 December 2002
Builder:	PPL Shipyard Pte Ltd (primary) Jurong Shipyard Pte Ltd (subcontractor) Singapore
Laid down:	26 May 2003
Acquired:	19 February 2005
Identification:	ABS class no.: 8765515 Call sign: YJUL9 DNV ID: 29750 IMO number: 8765515 MMSI number: 576971000
Status:	Operational
Notes:	[1]
General characteristics
Class and type:	American Bureau of Shipping: A1, AMS, DPS-2
Tonnage:	30,236 GT 9,070 NT
Length:	115.7 m (380 ft)
Beam:	78.68 m (258.1 ft)
Draught:	operating: 17 to 20 m (56 to 66 ft) Transit: 8.3 m (27 ft)
Depth:	37 m (121 ft)
Deck clearance:	16,016 m (52,546 ft)
Propulsion:	8 × 4,300 hp
Capacity:	Base oil: 730 m3 (26,000 cu ft) Freshwater: 755 m3 (26,700 cu ft) Lube oil: 71.78 m3 (2,535 cu ft) Tank ballast: 21,891.81 m3 (773,102 cu ft) Fuel oil: 3,226 m3 (113,900 cu ft)
Crew:	176
Notes:	[2][3]

Development Driller II was deployed in drilling a relief well on the Macondo Prospect to stop the oil spill caused by the explosion and subsequent loss of Deepwater Horizon.[4]