Patent ID: 11725458

Abstract:
A sidetracking method includes lowering a sidetrack assembly to a target zone of a wellbore comprising a casing. The sidetrack assembly comprising a cutting tool coupled to a wellbore string and a whipstock releasably coupled to the cutting tool. The method includes setting the whipstock on a wall of the wellbore, pulling the wellbore string, decoupling the cutting tool from the whipstock, actuating the cutter, cutting along a cut profile of the casing to cut free a portion of the casing at the target zone, actuating the mechanical fasteners, fastening the portion of the casing to the cutting tool, pulling the wellbore string, detaching the portion of the casing from the wall of the wellbore, drilling, with a directional drill string a sidetrack wellbore extending from the window to a downhole location of the sidetrack wellbore, and removing the whipstock from the wellbore.