The set of technical tools for excision of the "window" in the casing strings of KF type
The set of technical tools KF is purposed to mill "windows" in casing strings and for sidetracking. Rotator of a drill rig is used as a gear. The set consists of: 1. Mechanical anchor is purposed to fasten the chock-deflector in an operating casinf string. The anchor structure allows, if necesarry, to pull up the choke-deflector from the well. The anchor is a many-functional tool and can be applied in two different sizes of casing strings. 2. The choke-deflector is purposed to provide the necessary deflection of cutting tools from the axle of the main borehole shaft whilst excising “the window” in the operating casing string. 3. Starter is purposed to install the choke-deflector in a borehole shaft and for primary milling of “windows” in casing strings. 4. "Window"-mill is purposed for final cutting of "the window" in a casing string and for sidetracking. 5. Mill-reamer is purposed to widen and calibrate sides of "the cut window". 6. Shear pin is purposed to connect the starter to the choke-deflector. 7. Pulling hook is purposed to pull chock-deflector and anchor out of a borehole.
