Power slip unit

Details Power slip unit Power slip unit

1975-02-18

1976-06-08

Griffin, Donald A.

Buckles, buttons, clasps, etc.

Strap-end-attaching devices

Buckle connected

E21B 304

Patent

active

039613992

ABSTRACT:
A power slip for supporting a well pipe, including a plurality of downwardly tapering slips adapted to be wedged against a pipe by engagement with a slip bowl, with the slips being mounted for movement between an active position about the pipe and a retracted position offset to a side of the pipe, and with the mechanism including power operated means for clamping the slips about the pipe independently of the camming action of the slip bowl in a relation enabling the slips to be moved into and out of the bowl by movement of the pipe.

REFERENCES:
patent: 1179500 (1916-04-01), Brown
patent: 1644470 (1927-10-01), Greve
patent: 1659783 (1928-02-01), Pearce
patent: 2034101 (1936-03-01), Howard et al.
patent: 2570039 (1951-10-01), Stone
patent: 2607098 (1952-08-01), Wilson
patent: 2641816 (1953-06-01), Liljestrand
patent: 2684166 (1954-07-01), De Jarnett
patent: 3514822 (1970-06-01), Guier

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