Discoverer Enterprise

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Discoverer Enterprise in the foreground on May 26, 2010, directly over the blowout preventer during the top kill procedure in the Deepwater Horizon oil spill disaster.
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Name: Discoverer Enterprise
Owner: Triton Asset Leasing GmbH
Operator: Transocean Offshore Deepwater Drilling Inc.
Port of registry: Majuro, Marshall Islands
Builder: Astilleros y Talleres del Noroeste (ASTANO)
Ferrol, Spain
Laid down: 14 March 1997
Launched: 1 August 1998
Completed: 1999
Identification: Call sign: V7HD2
DNV ID: 19643
IMO number: 9186792
Status: Operational
General characteristics
Class and type: Det Norske Veritas
Tonnage: 69,500 DWT; 63,190 GRT
Length: 254.4 m (835 ft)
Beam: 38.05 m (124.8 ft)
Draught: 13 m (43 ft)
Propulsion: 6 x Cegelec 5500kw, 1260vac
6 x AC Aquamaster 7000hp thrusters
Capacity: Liquid Mud: 2,447 m3 (86,400 cu ft)
Drill Water: 2,177 m3 (76,900 cu ft)
Potable Water: 794 m3 (28,000 cu ft)
Fuel Oil: 3,972 m3 (140,300 cu ft)
Bulk Mud: 453 m3 (16,000 cu ft)
Bulk Cement: 453 m3 (16,000 cu ft)
Crew: > 200
Notes: [1]

Discoverer Enterprise is a fifth generation deepwater double hulled dynamically positioned drillship (Astano FPSO design) owned and operated by Transocean Offshore Deepwater Drilling Inc., capable of operating in moderate environments and water depths up to 3,049 m (10,000 ft) using an 18.75 in (47.6 cm), 15,000 psi blowout preventer (BOP), and a 21 in (53 cm) outside diameter (OD) marine riser.[2] From 1998 to 2005 the vessel was Panama-flagged and currently flies the flag of convenience of the Marshall Islands.[1]

Discoverer Enterprise has two sister ships, Discoverer Spirit completed in 1999, and Discoverer Deep Seas completed in 2000.

The ship was the first to offer dual rigs. The dual rigs which simultaneously perform various aspects of drilling a well eliminated the traditional one step at a time process and according to Transocean increased efficiency by 40 percent.[3]

The US$360 million ship gives its name to the Enterprise Class of large deepwater drillships.[4]

The ship currently operates in the Gulf of Mexico under contract to BP. On June 3, 2010 after the lower marine riser package (LMRP) cap was placed on the ruptured undersea Deepwater Horizon oil spill it was connected via a drilling riser to the ship where oil was collected and gas was flared.[5]

Although Discoverer Enterprise is capable of handling 15,000 barrels/day, the Deepwater Horizon spill is believed to be producing more than that.[6] The Helix Energy Group Q4000 is being configured to handle the excess. Q4000 is onsite because it was used in the failed top kill attempt.[7]

See also


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