Lock mandrel latch assembly

Details Lock mandrel latch assembly Lock mandrel latch assembly

1989-11-27

1991-03-05

Neuder, William P.

Wells

Expansible anchor or casing

Spring set

166217, E21B 2302

Patent

active

049970380

ABSTRACT:
A well tool locking assembly comprising a lock mandrel having locking keys adapted to releasably engage a locking annulus within a well bore, and a latch assembly adapted to maintain the lock mandrel in a desired positional relation to the locking annulus until such time as the locking keys engage the locking annulus; the latch assembly further comprising at least one rotatably mounted, outwardly biased pawl adapted to engage the locking annulus, and a shear pin disposed below the pawl, the pawl being adapted to rotate downwardly into contact with the shear pin whenever the pawl is forced into contact with the upper portion of the locking annulus, the shear pin being further adapted to shear whenever the force exerted on it by the pawl exceeds a predetermined maximum.

REFERENCES:
patent: 3382929 (1968-05-01), Plunk
patent: 3504743 (1970-04-01), Winters

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