Selectively releasable overshot and pull tool

Details Selectively releasable overshot and pull tool Selectively releasable overshot and pull tool

1979-08-02

1980-11-11

Cherry, Johnny D.

Handling: hand and hoist-line implements

Grapple

Well type

294 8625, 294 863, E21B 3112

Patent

active

042328942

ABSTRACT:
A pulling tool for retrieving an article or fish from a well bore and utilizing a spear or grapping type action to establish connection with the fish. Cooperative internal and external tubular members are selectively movable to secure the pulling tool to the fish or to release the fish. An internal spring element cooperating with a positioning pin establishes controlled relative movement of the internal and external tubular members upon simple linear movement of the tool.

REFERENCES:
patent: 2250463 (1941-07-01), Boynton
patent: 2893491 (1959-07-01), Crowe
patent: 3211479 (1965-10-01), Brown
patent: 4061389 (1977-12-01), Keller et al.
patent: 4093294 (1978-06-01), Taylor
patent: 4101157 (1978-07-01), Richey

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