Wells – Packers or plugs – Flow stopping type; e.g. – plug
Patent
1989-02-13
1990-05-29
Novosad, Stephen J.
Wells
Packers or plugs
Flow stopping type; e.g., plug
166119, 166237, E21B 3312
Patent
active
049287621
ABSTRACT:
A retrievable bridge plug and packer apparatus. The tool includes a packer settable by right-hand rotation and vertical manipulation of the tool string and a bridge plug also settable by right-hand rotation and vertical manipulation of the tool string. A disabling tool is provided to disable the packer during setting of the bridge plug so that the packer is not prematurely set. After setting of the bridge plug below the formation, the packer and disabling tool may be disengaged from the bridge plug. At this point, the disabling tool is disengaged so that the packer may be set above the formation. The packer is unset by pulling on the tool string, and the packer and disabling tool may be reconnected to the bridge plug. Again lifting on the tool string unsets the bridge plug so that the apparatus may be retrieved or reused. A method of treating a well formation is also disclosed.
REFERENCES:
patent: Re28641 (1975-12-01), Chenoweth
patent: 3289766 (1966-12-01), Bigelow
patent: 4149594 (1979-04-01), Evans
patent: 4427063 (1984-01-01), Skinner
patent: 4567944 (1986-02-01), Zunkel et al.
patent: 4569396 (1986-02-01), Brisco
patent: 4627491 (1986-12-01), Zunkel
patent: 4664188 (1987-05-01), Zunkel et al.
Halliburton Sales & Service Catalog No. 43, pp. 2559-2560 and 2563-2565.
Duzan James R.
Halliburton Company
Kennedy Neal R.
Melius Terry Lee
Novosad Stephen J.
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