Locking mandrel

Details Locking mandrel Locking mandrel

1980-12-04

1982-12-07

Novosad, Stephen J.

Wells

Expansible anchor or casing

Expansible means translated by wedge or cam

166383, 166156, E21B 2302, E21B 2308

Patent

active

043622119

ABSTRACT:
A locking mandrel including a pumpdown piston and flow control means in which a dog expander engages a shoulder in a landing nipple and is moved to dog expanded position to lock the locking mandrel in the landing nipple and in which the locking mandrel may be released from the landing nipple by moving the body thereof either upward or downward to shift the expander from under the dogs to permit them to retract and release the landing nipple.

REFERENCES:
patent: 2380612 (1945-07-01), Quintrell
patent: 2929453 (1956-07-01), Conrad

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