Setting and retrieval device for down-hole equipment

Details Setting and retrieval device for down-hole equipment Setting and retrieval device for down-hole equipment

1974-12-16

1976-06-01

Love, John J.

Handling: hand and hoist-line implements

Grapple

Well type

294 8618, 294 862, E21B 3102

Patent

active

039603997

ABSTRACT:
A setting and retrieval device for down-hole equipment which includes a solid mandrel tapered at its bottom to a larger diameter which cooperates with a set of surrounding collet fingers which have a shoulder and gripping threads thereon to engage a fish or a tool to be set down hole. The apparatus is used as a running tool and a retrieval tool. The collet fingers slide relative to the taper at the urging of a compressible spring arranged between a slidable thimble which supports the collet fingers. It is locked in the up position by serrations which face one another.

REFERENCES:
patent: 1358807 (1920-11-01), Wilkinson
patent: 1445680 (1923-02-01), Guess
patent: 1573646 (1926-02-01), Schiefferle et al.
patent: 1715481 (1929-06-01), Ventresca
patent: 3108637 (1963-10-01), Lee et al.
patent: 3527494 (1970-09-01), Young

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