Chemical injection valve

Details Chemical injection valve Chemical injection valve

E - Fixed Constructions

21

B

166/25

E21B 43/27 (2006.01) E21B 34/06 (2006.01)

Patent

CA 1158545

CHEMICAL INJECTION VALVE Abstract of the Disclosure A chemical injection valve, for use with either an outside mount or side pocket mount gas lift mandrel for injecting chem- icals, hot oil and the like into production tubing. The valve has a tubular housing with fluid inlet ports and fluid outlet means with a longitudinal bore connecting the inlet ports and the fluid outlet means. A biased valve metering member is positioned in the bore between the fluid entry port and the fluid outlet means to regulate the flow of fluids therebetween. A fluid by-pass is provided in the housing which is opened and closed by the biased valve metering member in response to the greater of the pressure of fluid entering the fluid entry port or biasing means acting on said valve metering member. When opened, the by-pass provides fluid communication between the fluid entry ports and the fluid outlet means. The biasing means is a spring having a predetermined spring force. Means are provided for adjusting the spring force.

378152

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