Friction spring and slip retainer for a mechanical setting tubin

Details Friction spring and slip retainer for a mechanical setting tubin Friction spring and slip retainer for a mechanical setting tubin

1978-07-27

1980-02-19

Pate, III, William F.

Wells

Expansible anchor or casing

With wedge or cam and friction drag

294 8625, E21B 2300

Patent

active

041890019

ABSTRACT:
A mechanical tubing anchor has a plurality of slip elements mounted in an elongated casing and movable between an extended position and a retracted position. A plurality of friction springs are rigidly secured around an upper end portion of the tubing anchor casing and extend downwardly with the lower end portion of each friction spring resting on an associated slip element. The friction springs extend outward from the casing along their mid-portion to rub against the interior of a well bore and to be compressed in order to bias the slip elements toward their retracted position.

REFERENCES:
patent: 1608828 (1926-11-01), Wright
patent: 2141987 (1938-12-01), Jones
patent: 2656890 (1953-10-01), Brandon
patent: 3643737 (1972-02-01), Current

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