The utility model relates to a well whipstock fishing operation technical field of oil field branch, in particular to vatman's utensil in branch's well slips formula. Threaded connection has a cover on the device's the whipstock lower extreme inner wall, and the top is overlapped the upper end and is equipped with the barrel, and barrel upper end top is on whipstock inner wall step, and the processing of barrel inner wall has levogyration buttress thread, processes the levogyration buttress thread who has with the same pitch of barrel inner wall of thread on the slips outer wall, and slips outer wall threaded outside diameter is lighter than barrel inner wall of thread, and slips outer wall screw is connected with barrel inner wall of thread, and the processing of slips inner wall has levogyration buttress thread. The utility model discloses an improve the whipstock and salvage successfully probability, have the construction simple, salvage the big advantage of tonnage, reduced the construction degree of difficulty, reduce because of salvaging the down -hole troublesome condition that follow -up construction probably brought to branch's well, the security of salvaging has improved, the well well completion of assurance branch is under construction and is gone on smoothly.