Fluid handling – Line condition change responsive valves – Direct response valves
Patent
1984-05-21
1986-01-21
Cohan, Alan
Fluid handling
Line condition change responsive valves
Direct response valves
137540, 137155, F16K 1500
Patent
active
045652155
ABSTRACT:
A chemical injection valve, for use with either an outside mount or side pocket mount gas lift mandrel for injecting chemicals, 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 to 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.
REFERENCES:
patent: 1781824 (1930-11-01), Smith
patent: 2225880 (1940-12-01), Montelius
patent: 3103950 (1963-09-01), Gulick
patent: 3366138 (1968-01-01), Graham
patent: 3474859 (1969-10-01), Chenoweth
patent: 3559671 (1971-02-01), Douglas
patent: 3993129 (1976-11-01), Watkins
patent: 4256137 (1981-03-01), de Launay
Cummings, deceased Leslie L.
Cummings, executrix by Mildred
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