Subsurface injection tool

Details Subsurface injection tool Subsurface injection tool

1985-06-10

1986-08-12

Novosad, Stephen J.

Wells

Packers or plugs

With expanding anchor

166128, 166129, 166131, 166194, 166324, 166332, E21B 33124, E21B 3414, E21B 4314, E21B 2306

Patent

active

046050620

ABSTRACT:
An injection tool for use in injecting fluids through perforations in the well bore of an oil or gas well is mechanically set and mechanically releasable. Fluid can be injected between upper and lower packing elements into a selected perforation. The upper and lower packing elements on opposite sides of the perforation into which fluid is injected are retractable, and any pressure differential across the upper packing elements or across the lower packing elements can be separately equalized.

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patent: 3008523 (1961-11-01), Clark, Jr. et al.
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patent: 3434538 (1969-03-01), Kilgore et al.
patent: 3517743 (1970-06-01), Pumpelly et al.
patent: 3861465 (1975-01-01), Mignotte
patent: 4258787 (1981-03-01), Amancharla
patent: 4567944 (1986-02-01), Zunkel et al.

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