Anchor device

Details Anchor device Anchor device

1989-03-31

1990-07-17

Neuder, William P.

Wells

Expansible anchor or casing

With wedge or cam and friction drag

166217, E21B 2300

Patent

active

049415328

ABSTRACT:
An oil well tubing anchor for anchoring in large diameter casing after passing through small diameter casing where the anchor employs wall engaging members on the end of pivotally supported arm members and an expander for sequentially moving the arm members radially by use of cooperating, differently inclined surfaces. The tool is moved between collapsible and expandable position by rotations.

REFERENCES:
patent: 1074427 (1913-09-01), Frederickson
patent: 2111793 (1938-03-01), Lee et al.
patent: 4496000 (1985-01-01), Weeks
patent: 4678209 (1987-07-01), Guice
patent: 4715456 (1987-12-01), Poe, Jr. et al.

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