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Vol. 58 No. 1

January 2006

Brunei Shell Petroleum offshore Well A was shut in because the 31/8-in. master valve on the 5,000-psi monoblock tree was stuck in the closed position because of scale. Two options were considered for recovering the well with well intervention techniques rather than a complete workover and well-kill operation. Because the nearest gate-valve milling machine was in Europe, the valve was milled by use of a coiled-tubing (CT) unit that was on the platform performing a stimulation program on adjoining wells. This operation had been performed only once before, in the North Sea.

View a Synopsis of SPE 96685 published in JPT.

For a limited time, the full-length paper is available free to SPE members. The paper has not been peer reviewed.

Source

This article, written by Assistant Technology Editor Karen Bybee, contains highlights of paper SPE 96685, "Pioneering "Gate Valve Milling" Operation Performed With Coiled Tubing, Recovers an Important Oil Producer Offshore Brunei," by N.M. Al Araimi, SPE, Brunei Shell Petroleum; B. Gedge, SPE, and K. Burns, Weatherford; and M. Mahajan, SPE, BJ Services, prepared for the 2005 SPE Annual Technical Conference and Exhibition, Dallas, 9-12 October.

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