Shearable no go insert for a well lock

Details Shearable no go insert for a well lock Shearable no go insert for a well lock

1983-03-25

1984-07-03

Leppink, James A.

Wells

Expansible anchor or casing

Expansible means translated by wedge or cam

166317, 285 3, E21B 2302

Patent

active

044573685

ABSTRACT:
An improved no go shoulder on a well lock which is adapted to lock in a locking notch in a landing nipple in a well in which the lock includes a setting wedge to be moved, after shearing setting shear means, for actuating locking dogs into the locking notch. The no go shoulder is of a shearable material having a shear strength load capacity greater than the shear strength capacity of the setting shear means but having a shear strength capacity less than the shear strength capacity of the landing nipple shoulder whereby the strength of the no go is sufficient to allow the lock to be set but is insufficient to deform the landing nipple shoulder. Preferably, the no go shoulder is a shearable insert positioned in a recess in the lock.

REFERENCES:
patent: 3169786 (1965-02-01), Cator
patent: 3863715 (1975-02-01), Yonker
patent: 4254829 (1981-03-01), Watkins
Camco General Equipment Catalog 1976-1977, pp. 1199-1200.

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