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Baseplate stops wellhead movement in Libyan oil field

02/05/2007
Installation of a baseplate stopped wellhead movement on wells drilling in the Eastern Libyan Desert. Arabian Gulf Oil Co. operates the wells.For drilling most of the wells, the company used rigs with a limited 19-24 ft substructure height. The work required a 4-ft cellar, dug prior to spudding the wells, to accommodate the blowout preventer stack.Fig. 1 shows a typical wellhead used in the area. The cellar houses Section A (13 5/8-in., 3,000 psi) and Section B (13 5/8 × 11-in., 3,000 psi) of the wellhead. Click here to enlarge imageThe 13 3/8-in. surface casing, cemented to surface, serves as pile anchor to support the landing weights of subsequent casing and liner strings. Becaus...
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