Wells – Packers or plugs – Flow stopping type; e.g. – plug
Patent
1981-09-17
1983-02-22
Novosad, Stephen J.
Wells
Packers or plugs
Flow stopping type; e.g., plug
166164, 166188, 166242, 166317, 166319, 166376, E21B 3312
Patent
active
043745431
ABSTRACT:
A method and apparatus are disclosed for sequentially treating two vertically separated zones in a well bore, utilizing a packer having a fluid passageway therethrough set between the zones, a pressure shearable plug at the lower end of the packer, and a retrievable fluid plug at the upper end of the packer. Once the packer, with the shear plug on its lower end, is set in the well bore between the two zones, the retrievable plug is placed in the upper end of the packer to isolate the shear plug from well pressure in the upper zone, and the desired treating steps are performed on the upper zone. The retrievable fluid plug is then removed and tubing run to the packer to establish communication with the shearable fluid plug. The shearable plug permits static pressure testing of the tubing string and seals before communication is established with the lower zone, and then may be removed by elevating fluid pressure to sufficiently shear the plug. The desired treating operations may then be performed on the lower zone. This abstract is neither intended to define the invention of the application, which of course is measured by the claims, nor is it intended to be limiting as to the scope of the invention in any way.
REFERENCES:
patent: 3062292 (1962-11-01), Lowrey et al.
patent: 3091293 (1963-05-01), Fry
patent: 3095040 (1963-06-01), Bramlett
patent: 3115186 (1963-12-01), Kline
patent: 3166124 (1965-01-01), Johnson
patent: 3211229 (1965-10-01), Bramlett
patent: 3662834 (1972-05-01), Young
patent: 4040485 (1977-08-01), Vann et al.
Novosad Stephen J.
Suchfield George A.
Tri-State Oil Tool Industries, Inc.
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