Whipstock collet latch

A method of anchoring a whipstock on the mill or drill body using an anchor extendible to engage an eyelet formed or provided on the whipstock to run in a mill and whipstock in one trip. The anchor is retractable into the body of the drill so that the drill can pass by the whipstock during lateral drilling and out the casing wall without interference. The anchor preferably is extended and retracted by hydraulic force controlled remotely by the operator. The anchor is preferably shaped to match and conform to the outer wall of the drill so that in the closed position, the anchor is contiguous with and does not extend beyond the outer diameter of the drill body. Part of the drill body is preferably removed to allow the anchor to nest within the space provided by the removal of the drill body.