Check valve for fluid-producing wells
Patent
·
OSTI ID:6514287
A check valve is provided for use in the tubing string of a fluid producing well. The check valve is removably seated within the restricted diameter of a seating nipple in the tubing string. Resilient holddown means at the base of the valve are provided for this purpose. The check valve comprises a hollow generally tubular body having a pierceable valve element positioned therein, the valve opens and closes in response to fluid pressures bearing thereon. To equalize the pressures above and below the valve the pierceable valve element may be ruptured by a conventional wireline spear, allowing the fluid to drain slowly through the valve.
- Assignee:
- R and C Machine Devon Ltd (Canada)
- Patent Number(s):
- US 4237980
- OSTI ID:
- 6514287
- Country of Publication:
- United States
- Language:
- English
Similar Records
Well safety valve system
Wireline safety check valve
Circulating valve for wells
Patent
·
Tue Jun 16 00:00:00 EDT 1981
·
OSTI ID:5996147
Wireline safety check valve
Patent
·
Tue May 12 00:00:00 EDT 1981
·
OSTI ID:6049377
Circulating valve for wells
Patent
·
Mon Nov 22 23:00:00 EST 1982
·
OSTI ID:5550082