The W Lock Mandrel is a no-go lock which is used in a series of F Landing Nipples. It is made up of one no-go shoulder and two spring-loaded locking dogs which help to prevent downward and upward movement. It offers positive locating series for subsurface controls in the selective F Landing Nipple profiles.
It has a larger O.D. dimension near the top of the lock mandrel which no-go’s on top of the nipple profile sealing bore preventing downward movement when locked in the nipple profile. The two locks are fitted and pinned in the body of the lock mandrel facing up to prevent upward movement of the lock assembly when locked into the nipple profile.
