They are used in heavier weight tubing due to higher well pressure. These locking mandrels use keys that lock into a profile in the landing nipple that allow it to hold pressure differential from either above or below. This lock can be used in conjunction with pump through plugs, positive plug, safety valve and standing valves.
The SXN locking mandrel is “NO-GO” version of the usually selective locks. The keys have an angle shoulder on them instead of the square shoulder of the selective locks. A “ NO-GO” shoulder of an equalizing sub of a crossover sub made up the bottom of the lock must make contact with a bore restriction in the “NO-GO” nipple in order to lock this mandrel in the appropriate nipple. This locking mandrel can be used in conjunction with pump through plugs, positive plugs, safety valves, bottom hole chokes and standing valves.
Can provide the Running Tool and Pulling Tool that match with the SX and SXN locking mandrel.