A sliding sleeve is a standard component for the completion of an oil or gas well.
This provides a flow path through the center of the tool while it is being set in the sliding sleeve.
The separation tool adapts to most manufacturers' locks to match the nipple profile in the sliding sleeve.
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.