Downhole window milling apparatus and method for using the same

Details Downhole window milling apparatus and method for using the same Downhole window milling apparatus and method for using the same

E - Fixed Constructions

21

B

E21B 29/06 (2006.01) E21B 7/06 (2006.01)

Patent

CA 2294552

A window milling device which parameters can be set, prior to running inside a casing, and once positioned at a proper location can assure accurate and constant milling parameters, independently from hole configuration and geometry. The assembly consists of an anchoring device, to which a whipstock is connected, and a milling bit attached to a motor, contained within a motor housing. The whipstock has a predetermined groove, and the motor housing is fitted with a mating key having a complimentary profile to the groove. Thus, when the mating key engages the groove, the motor housing travels down the whipstock to a predetermined location, where the milling of the wellbore casing commences.

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