the running tool is attached to the lock in the normal manner. After locating the sliding sleeve, the operator jars downward to set the lock, then pulls upward to close the isolation plug in the separation tool. As this happens, a garter spring in the isolation plug moves a steel shear pin into a groove on the sealing prong, and an O-ring on the internal prong seals to isolate the tubing below the sliding sleeve. The running prong that is pinned to the top of the internal prong is then sheared, and the slickline toolstring may be withdrawn from the well. References Oil wells