Rig: Essar Wildcat

Name Essar Wildcat
Owner Essar Oilfields Services Ltd.
Manager Essar Oilfields Services Ltd.
Rig Type Semisub
Sub Type Midwater Floater
Jackup Type --
Max Water Depth (ft) 1640
Max Drill Depth (ft) 25000
Dimensions (ft) 354 x 220 x 120
Leg Length (ft) --
Competitive Yes

Current Location

Country Singapore
Region South East Asia

Drilling Equipment

Drawworks Type Continental Emsco C3 Type II
Drawworks HP 3000
Mud Pumps Type Continental Emsco FB-1600 Triplex
Top Drive Aker Maritime Hydraulics DDM-650
Hookload Capacity (lbs) 1000000

Rig Construction Details

Rig Design Aker
Rig Model H-3
Year Built 1977
Country of Build Norway
Yard Name Verdal Shipyard
Group Yard Name Aker ASA

Rig Contract Details

Operating Status Ready Stacked
Operator --


25 Apr 2001

Small find in Gullfaks area

Statoil has proven hydrocarbons in an exploration well in the Gullfaks area of the North Sea. The find is currently not considered to be commercial. The well was drilled in block 34/10, production licence 050B, in a separate structure roughly 10 kilometres south-west of the Gullfaks field. Eirik Graue, who was project manager of the well, says that a thin hydrocarbon zone with good properties was proven. This was most probably oil, but the well was not production tested. Measurements of the pressure in the reservoir, however, provided promising information, both in respect of this find and with a view to future exploration in the area. “Even though the find is probably not commercial this time, the volumes may be large enough to justify a sidetrack from a nearby template in the future,” he says. The rig Transocean Wildcat completed the drilling in 48 days, well ahead of schedule. Total vertical depth was 3,220 metres, but the well track has a total length of 5,725 metres, travelling diagonally and partly horizontally through Jurassic, Triassic and Cretaceous rocks. Statoil is the operator in production licence 050B and has an 18 per cent interest. The other partners are the state’s direct financial interest (SDFI) with 73 per cent, and Norsk Hydro with nine per cent.

5 Feb 2001

Transocean Wildcat rig repairs

The Transocean Wildcat rig, which is currently drilling for Statoil, will be taken to land for repairs following the discovery of cracks in a number of diagonal bracings. The cracking was revealed during an internal inspection by rig owner Transocean Sedco Forex at the end of last week. Due to leave the Gullfaks field in the North Sea on Tuesday 6 February, the Aker H-3 semi-submersible will arrive at the Hanøytangen yard near Bergen the next morning. Repairs are expected to take 14 days. The rig had just finished drilling well 34/10-13H in the Rimfaks reservoir when the damage was discovered. Plans to move the rig to drill an exploration well on the Gullfaks field have been postponed, says Hermod Johansen, manager for resource utilisation in Gullfaks satellites. Transocean Wildcat was also brought to land for repairs last November, after cracks were found in the horizontal bracings, during an annual routine inspection by Det Norske Veritas. According to Mr Johansen, the damage discovered now is in an area not examined during the last workover.

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