Tubing anchor

Details Tubing anchor Tubing anchor

1981-11-02

1983-03-22

Pate, III, William F.

Wells

Expansible anchor or casing

Fluid pressure actuated

175 99, 188 67, 294 8624, E21B 2306

Patent

active

043772072

ABSTRACT:
A tubing string anchor (20) is provided for anchoring a tubing string (14) within a well bore (10). This prevents motion of the tubing string during a pumping operation. The anchor (20) includes a support (26) for mounting a number of roller assemblies (32-38). Each roller assembly includes a roller slip (40) for frictional engagement with the wall ( 28) of the well bore (10). Notches (52) on the roller slips may cooperate with pawl assemblies (68) to prevent the slips from rotating in at least one direction to anchor the tubing string within the well bore. The pawl assembly may be activated by the hydrostatic pressure within the internal passage (24) within the annular section (30) during the pumping action. This permits the tubing string to be positioned and removed from the well bore freely.

REFERENCES:
patent: 210575 (1878-12-01), Stewart
patent: 2481009 (1949-09-01), Gill
patent: 3851707 (1974-12-01), Jett

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