Well packer

Details Well packer Well packer

1976-12-15

1978-01-31

Leppink, James A.

Wells

Packers or plugs

With expanding anchor

166139, 166182, 166315, E21B 2300, E21B 3312

Patent

active

040710840

ABSTRACT:
Disclosed is a retrievable, weight set well packer which may be tightened in set configuration by rotation of the tubing string, and which may be released from set configuration by longitudinal movement of the tubing string. Locking means maintain the packer set when the tubing string is raised slightly to open a bypass between the tubing string and the set packer. Continued raising of the tubing string releases the locking means to permit the packer to be retrieved. Dual opposed spreader cones keep the packer set against well pressure differentials acting from either above or below the packer. Pressure responsive means are also employed to increase the forces anchoring the tubing string against movement to open the bypass as differential well pressures tend to so move the tubing string.

REFERENCES:
patent: 3171490 (1965-03-01), States
patent: 3256437 (1966-06-01), Muse
patent: 3289766 (1966-12-01), Bigelow
patent: 3294172 (1963-08-01), Brown

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