Wells – Processes – With indicating – testing – measuring or locating
Patent
1980-08-19
1982-02-09
Leppink, James A.
Wells
Processes
With indicating, testing, measuring or locating
166133, 166135, 166307, 166308, 166387, E21B 2302, E21B 3324, E21B 4326, E21B 4327
Patent
active
043146082
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: 1303091 (1919-05-01), Mack
patent: 2307983 (1943-01-01), Barnes
patent: 2822048 (1958-02-01), Tausch
patent: 2928469 (1960-03-01), Crowe
patent: 2973035 (1961-02-01), Brown
patent: 3211229 (1965-10-01), Bramlett
patent: 3289762 (1966-12-01), Schell et al.
patent: 3980134 (1976-09-01), Amancharla
patent: 4188999 (1980-02-01), Amancharla
Leppink James A.
Suchfield George A.
Tri-State Oil Tool Industries, Inc.
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