Well tool

Details Well tool Well tool

1978-02-13

1980-09-30

Pate, III, William F.

Wells

Packers or plugs

With expanding anchor

166179, E21B 33128, E21B 33129

Patent

active

042249872

ABSTRACT:
The invention comprises a packer which seals against a surrounding well conduit. The packer comprises a mandrel which carries a radially extendable seal for engaging the well conduit. A hydraulic actuator is provided for urging the seal to its set position against the well conduit. Once set, the tool is responsive to fluid pressure differentials in the well conduit across the seal in either longitudinal direction to tighten the seal means. The cylinder of the actuator also serves as a guard to overlie and protect the seal in its unset position, while the piston is designed to define auxiliary piston area to reduce the required setting pressure. The seal is set by being extruded both longitudinally and radially over a retainer extending radially outwardly from the mandrel.

REFERENCES:
patent: 3142338 (1964-07-01), Brown
patent: 3459261 (1969-08-01), Cochran
patent: 3460616 (1969-08-01), Tucker et al.
patent: 4044826 (1977-08-01), Crowe

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