Combination subsurface safety valve and chemical injector valve

Details Combination subsurface safety valve and chemical injector valve Combination subsurface safety valve and chemical injector valve

E - Fixed Constructions

21

B

166/41

E21B 43/00 (2006.01) E21B 34/10 (2006.01) E21B 41/02 (2006.01) E21B 43/12 (2006.01) E21B 34/00 (2006.01)

Patent

CA 1067820

APPLICATION FOR UNITED STATES PATENT COMBINATION SUBSURFACE SAFETY VALVE AND CHEMICAL INJECTOR VALVE ABSTRACT OF THE DISCLOSURE A surface controlled subsurface safety valve for controlling fluid flow through a tubing string in an oil or gas well is combined with an injector valve, which is used for injecting a chemical fluid into the tubing string. The pressure exerted by the chemical fluid is used to operate both the injector valve and the subsur- face safety valve. The injector valve is designed to open at an injection pressure equal to or greater than the pressure needed to hold the safety valve in its open position.

284073

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