Wells – Packers or plugs – With expanding anchor
Patent
1981-05-21
1984-07-10
Pate, III, William F.
Wells
Packers or plugs
With expanding anchor
166331, E21B 33129
Patent
active
044587511
ABSTRACT:
An apparatus and method for the insertion and disengagement of a tubing string used in a subterranean well subject to oppositely directed pressure differentials is disclosed. A packer apparatus which anchors a portion of the tubing string against rotation is used in conjunction with a disengagable on/off connector and a valve apparatus capable of withstanding oppositely directed pressure differentials. The valve apparatus can be selectively opened and closed by rotary manipulation of the tubing string through the disengagable on/off connector. Portions of the tubing string above the valve apparatus can then be inserted into the well or removed from the well or tested for pressure integrity.
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patent: 3347318 (1967-10-01), Barrington
patent: 3398928 (1968-08-01), Fredd
patent: 3442328 (1969-05-01), Nutter
patent: 3509913 (1970-05-01), Lewis
patent: 3543793 (1970-12-01), Dollison
patent: 3703193 (1972-11-01), Raulins
patent: 4074761 (1978-02-01), Mott
patent: 4210207 (1980-07-01), McStravick
patent: 4230185 (1980-10-01), Fredd
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patent: 4293038 (1981-10-01), Evans
patent: 4293163 (1981-10-01), Braddick
1978-1979 Composite Catalog of Oil Field Equipment and Services, pp. 6460B and 6971.
Baker International Corporation
Pate III William F.
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