Gas storage well safety valve apparatus

Details Gas storage well safety valve apparatus Gas storage well safety valve apparatus

1975-02-26

1976-09-07

Leppink, James A.

Wells

Screens

Porous material

137510, E21B 4312

Patent

active

039789225

ABSTRACT:
In accordance with an illustrative embodiment of the present invention, a subsurface safety valve assembly that automatically closes in response to a drop in flowing pressure at the valve to a value that is below a set dome pressure, is provided with a flow restriction upstream of the valve that is sized to enable rapid closing of the safety valve in the event of disruption of surface flow lines or the like.

REFERENCES:
patent: 3126908 (1964-03-01), Dickens
patent: 3310114 (1967-03-01), Dollison
patent: 3452777 (1969-07-01), Dollison
patent: 3802504 (1974-04-01), Garrett
patent: 3827501 (1974-08-01), Johnson et al.
patent: 3884300 (1975-05-01), Garrett

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