Retrieval tool

Details Retrieval tool Retrieval tool

1984-02-17

1986-04-08

Cherry, Johnny D.

Handling: hand and hoist-line implements

Grapple

Well type

294 8612, 294 8624, E21B 3120

Patent

active

045808260

ABSTRACT:
A retrieval tool to retrieve loose pipe and the like from a well. A bell-mouth centering device is sent down the hole to center the pipe, and a spear passes through the centering device into the pipe. Gripping devices carried by the spear engage the pipe so as to pull it to the surface. The gripping devices are able to cut a thread in the pipe so as to be releasable from the pipe if desired.

REFERENCES:
patent: 672154 (1901-04-01), Taylor
patent: 1087262 (1914-02-01), Schildwachter
patent: 1163561 (1915-12-01), Schildwachter
patent: 1363226 (1920-12-01), Bonawitt
patent: 1589896 (1926-06-01), Rape
patent: 1839493 (1932-01-01), Nutter
patent: 2647008 (1953-07-01), Stewart et al.
patent: 2886369 (1959-05-01), Decuir

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