Subsurface well safety valve with hydraulic strainer
This patent describes in combination with a subsurface safety valve for controlling fluid flow through a well conduit and including a housing having a bore and a valve closure member moving between open and closed positions for controlling fluid flow through the bore, a flow tube telescopically moving in the housing for controlling the movement of the valve closure member, biasing means for moving the tubular member in a direction to close the valve and a hydraulic piston and cylinder assembly for actuating the valve closure member, of a hydraulic strainer comprising, means defining a closed chamber positioned above the hydraulic piston and cylinder assembly, means defining an inlet fluid passageway having first and second ends, the first end adapted to receive hydraulic control fluid through a control line from the well surface, the second end extending into the chamber, means defining an outlet fluid passageway having first and second ends. The first end of the outlet fluid passageway extending into the chamber, and the second end of the outlet fluid passageway connected in fluid communication to the top of the hydraulic piston and cylinder assembly, the second end of the inlet fluid passageway being positioned away from the first end of the outlet fluid passageway for allowing debris to accumulate in the chamber and protect the piston and cylinder assembly.
- Assignee:
- Camco, Inc., Houston, TX
- Patent Number(s):
- US 4791991
- OSTI ID:
- 6483095
- Country of Publication:
- United States
- Language:
- English
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03 NATURAL GAS
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CONTROL EQUIPMENT
DESIGN
DRILL PIPES
DRILLING EQUIPMENT
EQUIPMENT
EQUIPMENT PROTECTION DEVICES
FIELD PRODUCTION EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FLUID MECHANICS
HYDRAULICS
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NATURAL GAS WELLS
OIL WELLS
OPERATION
PIPES
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RELIEF VALVES
VALVES
WELLS