Method and apparatus for lateral casing window cutting using...

Details Method and apparatus for lateral casing window cutting using... Method and apparatus for lateral casing window cutting using...

E - Fixed Constructions

21

B

E21B 29/06 (2006.01) E21B 23/00 (2006.01)

Patent

CA 2340268

A method and apparatus using hydrajetting of fluid to cut a lateral casing window for drilling a side track. The apparatus comprises a J-sub having a J-slot therein which guides movement of a jetting nozzle such that a window may be abrasively jetted in well casing in the general shape of the J-slot. In an alternate embodiment, a hydraulically activated actuator sub is used to operate the J-sub. The actuator sub is activated by alternately pressurizing and depressurizing the actuator sub to apply longitudinal movement and torque to the J-sub.

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