Retrievable whipstock system

Details Retrievable whipstock system Retrievable whipstock system

1994-05-16

1995-12-12

Schoeppel, Roger J.

Wells

Means for guiding insertable element laterally of well axis

Secured in operative position by movable means engaging well...

166382, 175 61, E21B 3313

Patent

active

054741262

ABSTRACT:
A whipstock assembly is provided for lowering within a cased wellbore, cutting a window through a casing for drilling a sidetrack borehole, and retrieving with conventional fishing tools. The whipstock assembly includes two separate whipstocks having different tapers, and which are releasibly coupled for separately retrieving from the cased wellbore. A barrier member is provided to prevent a tapered face of one of the whipstocks from wedging debris between the whipstock and the casing.

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A-1 Bowen Whipstocks Instruction Manual.
"Christensen Has Everything For Your Drilling and Coring Needs . . . " Brochure, pp. 1658-1699.
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