Wells – Valves – closures or changeable restrictors – Rotated operator
Patent
1986-05-12
1988-02-02
Novosad, Stephen J.
Wells
Valves, closures or changeable restrictors
Rotated operator
166324, 166131, E21B 3412
Patent
active
047224002
ABSTRACT:
An injection tool for use in injecting fluids into perforations of a production formation of an oil or gas well is mechanically set in the bore of the casing traversing the production formation, and mechanically releasable therefrom so that chemical treatment fluid can be injected between upper and lower packing elements into a single or a selected vertical group of perforations. The injection tool is connected to the tubing string by a circulation valve operable by rotational movement of the tubing string. Injection of the chemical fluid treatment is accomplished with the circulation valve in the closed position, while the circulation valve is opened to equalize tubing and annulus pressure whenever required.
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Baker Oil Tools, Inc.
Letchford John F.
Novosad Stephen J.
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