Title: Gas storage well safety valve apparatus

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.

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Inventors: Johnson, Joseph L. (Houston, TX, US)
Guidry, Shelby L. (Conroe, TX, US)

Application Number: 553348
Filing Date: 1975-02-26
Publication_date: 1976-09-07
Assignee: Schlumberger Technology Corporation (New York, NY)
Primary Class(es): 166/322 137/510
Other Classes:
US Patent Ref:

3126908	Mar, 1964	Dickens	166/224.
3310114	Mar, 1967	Dollison	137/510.
3452777	Jul, 1969	Dollison	137/510.
3802504	Apr, 1974	Garrett	166/133.
3827501	Aug, 1974	Johnson et al.	166/224.
3884300	May, 1975	Garrett	166/133.

Other Refs:
Primary Examiner: Leppink, James A.
Assistant Examiner:
Attorney: Moseley; David L., Sherman; William R., Moore; Stewart F.