Well reverse flow check valve
Patent
·
OSTI ID:5943468
A well reverse flow check valve is described for use in a well tubing comprising, a housing having a bore and adapted to be placed in a well production tubing above an electrical submersible pump, flapper valve element in the bore moving between open and closed positions for allowing upward flow through the bore but preventing downward flow through the bore, a flow tube telescopically movable in the housing upwardly for opening the flapper valve element, and downwardly for actuating the closing of the flapper valve element, means connected to the flow tube for biasing the flow tube downwardly for closing the flapper valve element, pressure responsive means connected to the flow tube for moving the flow tube upwardly in response to an upward flow rate pressure drop for opening the flapper valve element open, the housing having a port between the bore and the outside of the housing, valve closure means releasably connected to the housing and initially blocking the port, the pressure responsive means is an expandable and contractible restriction connected to the flow tube and extending into the bore, the port in uncovered when the valve closure means is moved downwardly, and the valve closure means includes the flapper valve element and a valve seat connected to a support which is releasably connected to the housing.
- Assignee:
- Camco, Inc., Houston, TX
- Patent Number(s):
- US 4688593
- OSTI ID:
- 5943468
- Country of Publication:
- United States
- Language:
- English
Similar Records
Method and apparatus for locking a subsurface safety valve in the open position
Down hole blow out preventer and method of use
Well subsurface safety valve
Patent
·
Tue Mar 11 04:00:00 UTC 1986
·
OSTI ID:5839252
Down hole blow out preventer and method of use
Patent
·
Tue May 13 04:00:00 UTC 1986
·
OSTI ID:5475362
Well subsurface safety valve
Patent
·
Tue Jul 01 04:00:00 UTC 1986
·
OSTI ID:5560428