Releasable wireline spear

Details Releasable wireline spear Releasable wireline spear

1975-06-04

1978-06-06

Marbert, James B.

Handling: hand and hoist-line implements

Grapple

Well type

294 94, E21B 3102

Patent

active

040932940

ABSTRACT:
A releasable spear adapted to be run on a wireline or a tubing string, as desired, incorporates an elongate body and an external slidable sleeve. The sleeve is forced downwardly by a compressed spring at the top end of the sleeve. The sleeve supports a pair of internal projecting lugs which are received in an external groove formed in a tubular member. The lugs and groove function as a cam and cam follower mechanism controlling upward and downward movement. The body terminates in an elongate tapered plug. The lower end of the sleeve incorporates a set of collet fingers which have external upwardly facing serrations to lock on the interior of a fish. The external sleeve incorporates a protruding shoulder which catches the upper end of the fish. The cam and cam follower mechanism controls axial movement of the elongate tapered plug to force the collet fingers outwardly to engage, or cause them to deflect inwardly to disengage a fish.

REFERENCES:
patent: 1785590 (1930-12-01), Miller
patent: 3108637 (1963-10-01), Lee et al.
patent: 3380528 (1968-04-01), Timmons
patent: 3638988 (1972-02-01), Brown
patent: 3716703 (1970-06-01), Templeton
patent: 3758146 (1973-09-01), Kaercher

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