Piston actuated chemical injection valve

Details Piston actuated chemical injection valve Piston actuated chemical injection valve

1984-09-27

1986-01-07

Scott, Samuel

Fluid handling

Diverse fluid containing pressure systems

Gas lift valves for wells

166319, F04F 108

Patent

active

045628548

ABSTRACT:
An injection valve for injecting chemicals into a well which is actuated by a piston having an upwardly and a downwardly directed metal cup seal with a resilient seal therebetween and a gas pressure charge above the piston acting to close the injection valve. Oil may be provided in the body between the gas charge and the piston for acting as a barrier. The gas charge may be placed in a closed gas container having a rupturable portion with a piercing means for opening the container. The container may include oil.

REFERENCES:
patent: 3362347 (1968-01-01), Canalizo
patent: 3993129 (1976-11-01), Watkins
patent: 4083187 (1978-04-01), Nagashima
patent: 4452310 (1984-06-01), Pringle et al.
patent: 4467867 (1984-08-01), Baker
Page 11, Camco Condensed Catalog 82/83.
Page 1331, Camco General Equipment Catalog 1980-1981.

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