Differential pressure energized circulating valve

Details Differential pressure energized circulating valve Differential pressure energized circulating valve

1983-01-31

1984-11-13

Weakley, Harold W.

Fluid handling

Line condition change responsive valves

Pop valves

137508, F16K 1720

Patent

active

044819730

ABSTRACT:
A circulating valve is provided for connection into the tubing string of a well for establishing selective flow of fluid between the tubing string and the well casing. The circulating valve incorporates a valve body which is adapted for connection into the tubing string of the well, which body defines a flow passage in registry with the flow passage of the tubing string. A valve seat is provided on the valve body and an outlet opening is defined downstream of the valve seat which is of sufficiently restricted dimension to permit opening of the valve at a particular injection pressure and to permit maintenance of the valve open condition by means of a pressure lower than the valve opening injection pressure.

REFERENCES:
patent: 2069645 (1937-02-01), Cardew
patent: 2855952 (1958-10-01), Tausch
patent: 2920764 (1960-01-01), Hodges
patent: 3054420 (1962-09-01), Williams
patent: 3199532 (1965-08-01), Trick
patent: 3504697 (1970-04-01), Colgan
patent: 4142549 (1979-03-01), Autry

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