"S" / "T" Lock

Description

The Type “S” Locking Mandrel consists of two basic subassemblies- the locking assembly and the locating assembly. The locking assembly consists of locking dogs and a set of packing that seals in the polished seal bore of the Type “S” Landing Nipple. The locating section has a set of locating keys (seven different profile positions available) that match with the profile of the landing nipple. When the locking mandrel and locator are lowered into the proper landing nipple, the locator keys will engage with the profile of the nipple and stop the locking mandrel from traveling down and out of the nipple. The locking dogs of the locking section would then be in line with an upper profile of the nipple that would stop the lock from traveling up and out of the nipple. This allows the locking mandrel to withstand a pressure differential from above and below. It can be used in conjunction with pump through plugs, positive plugs, standing valves, and safety valves.

The “T” Locking Mandrel operates in the same way as the “S” Lock and Locator. It is used in heavy wall tubing instead of standard weight tubing as the “S” is.