Mechanically actuated whipstock assembly

Details Mechanically actuated whipstock assembly Mechanically actuated whipstock assembly

E - Fixed Constructions

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B

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E21B 7/08 (2006.01) E21B 7/06 (2006.01) E21B 7/18 (2006.01) E21B 17/07 (2006.01) E21B 21/12 (2006.01) E21B 29/02 (2006.01) E21B 43/11 (2006.01) E21B 44/00 (2006.01) E21B 47/022 (2006.01)

Patent

CA 1265123

Abstract of the Disclosure Structure is passed into an earth well including a whip- stock attached to piping and a retractible anchor. The whipstock includes a number of connected guide assem- blies. Erection means is connected at one end to a forward guide assembly and at the other end to an ex- tension projecting to the earth surface. To erect the whipstock, an extension of the erection means is pulled from the surface to cause the guide assemblies to swing into a curved pathway. Thereafter, a drilling tube is passed through the whipstock into the adjacent formation. The whipstock may be deerected by releasing the extension means. Then, the anchor is released and the structure is pulled out of the well.

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