Rig: Sedco Energy

Name Sedco Energy
Owner Sedco Forex International Inc.
Manager Transocean Offshore Deepwater Drilling Inc.
Rig Type Semisub
Sub Type Ultradeep Water
Jackup Type --
Max Water Depth (ft) 7500
Max Drill Depth (ft) 35000
Dimensions (ft) 349 x 226 x 112
Leg Length (ft) --
Competitive Yes

Current Location

Country --
Region --

Drilling Equipment

Drawworks Type Hitec/Dreco AHC
Drawworks HP --
Mud Pumps Type National Oilwell Varco 14-P-220 Triplex
Top Drive Canrig Drilling Technology 1275 AC
Hookload Capacity (lbs) 2057000

Rig Construction Details

Rig Design Sedco Forex
Rig Model Express 2000
Year Built 2000
Country of Build France
Yard Name Brest Shipyard
Group Yard Name Direction des Constructions Navales International (DCN)

Rig Contract Details

Operating Status Retired

Rig Images


29 Jan 2003

Nnwa confirmation off Nigeria

An appraisal well drilled by Statoil in block 218 off Nigeria has confirmed that the gas reservoir in the Nnwa structure extends into the neighbouring block 219 operated by Shell. A successful production test was carried out in this Nnwa-2 well, which was plugged last November. The field was discovered with the Nnwa-1 wildcat in 1999, while Shell has earlier made a find with its Doro-1 well in block 219. Transocean Sedco Energy spudded Nnwa-2 last July in 1,191 metres of water. Drilled to a planned depth of 4,984 metres, the well encountered hydrocarbons in several reservoir levels. Nnwa-2 lies 180 kilometres south-west of Port Harcourt, 6.5 kilometres north-west of the Nnwa discovery well and 10.4 kilometres north-west of Doro-1. The partners in the two blocks have earlier signed a memorandum of understanding with the state-owned Nigerian National Petroleum Company (NNPC) and the national authorities. This agreement covers a feasibility study for a possible joint development of Nnwa and Doro. Being led by Statoil, this investigation is due to be completed by the end of 2003. The size of the structure makes it necessary to conduct further appraisal work in order to characterise Nnwa/Doro fully. Statoil has a 53.85 per cent interest in block 218, with ChevronTexaco as its partner.

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