Double seated well valve

Patent · Tue Jan 05 00:00:00 EST 1988

OSTI ID:5287535

Pringle, R E

A subsurface double seated well valve for use in a well conduit for controlling fluid flow through the conduit and between the inside and outside of the conduit is described comprising, a tubular housing adapted to be connected in a well conduit, the housing having a bore therethrough, a first valve seat in the bore and a second valve seat in the housing in communication between the inside and the outside of the housing, a valve closure member in the housing movable between and into contact with the first and second valve seats for alternately closing and opening fluid flow through the bore and between the inside and outside of the housing, a flow tube telescopically movable in the housing for controlling the movement of the valve closure member, a piston and cylinder assembly positioned in the housing and engaging the flow tube, one side of the assembly adapted to be in communication with a fluid control passageway to the well surface, and biasing means in the housing acting in a direction to move the valve closure member onto the second valve seat.

• Assignee: Camco, Inc., Houston, TX
• Patent Number(s): US 4716968
• OSTI ID: 5287535
• Resource Relation: Patent File Date: Filed date 12 Jan 1987
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
03 NATURAL GAS
NATURAL GAS WELLS
VALVES
OIL WELLS
DESIGN
CLOSURES
CYLINDERS
FLUID FLOW
HYDRAULICS
OPERATION
PISTONS
CONTROL EQUIPMENT
EQUIPMENT
FLOW REGULATORS
FLUID MECHANICS
MECHANICS
WELLS
020300* - Petroleum- Drilling & Production
030300 - Natural Gas- Drilling
Production
& Processing