Retrievable well packer

Details Retrievable well packer Retrievable well packer

1975-02-05

1976-08-24

Leppink, James A.

Wells

Packers or plugs

With expanding anchor

166134, 166182, E21B 3312, E21B 2300

Patent

active

039761339

ABSTRACT:
Disclosed is a well packer which is set by pressure applied through a tubing string which supports the packer within a surrounding well conduit. Once set, the packer is retrievable by either longitudinal or rotary movement of the supporting tubing string. Setting pressure drives opposed cone assemblies longitudinally toward each other to cause slip segments to move radially outwardly into anchoring engagement with the surrounding well conduit. The lowermost cone assembly is constructed in the form of a split ring and is equipped with friction teeth along its internal surface to retain the packer in its set position. A helical retrieving component secures the packer assembly to the central mandrel of the packer. Righthand rotation of the tubing string causes the outer body of the packer to unthread from the helical retrieving component secured to the mandrel which in turn unsets the packer. Alternatively, the helical retrieving means can be sheared by applying a straight vertical pull to the tubing string permitting the packer to be unset.

REFERENCES:
patent: 3244233 (1966-04-01), Villalon
patent: 3285343 (1966-11-01), Urbanosky
patent: 3371716 (1968-03-01), Current
patent: 3391740 (1968-07-01), Edwards
patent: 3398795 (1968-08-01), Elliston
patent: 3659647 (1972-05-01), Brown

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