Gas lift valve

Patent · Tue Jul 27 04:00:00 EDT 1971

OSTI ID:5666780

Alley, T R

A gas injection valve has a thin-wall, annular valve cage with the operative valve components formed in the valve wall. In the concentric form of the valve, the central flow passage of the valve is coaxial with the central flow passage of a conventional tubing string and has approx. the same internal diameter as the tubing in the string. The external diameter of the valve corresponds substantially to that of a conventional connecting coupler employed in a tubing string to contribute to the thin-walled valve construction which permits unrestricted well operations conducted internally or externally of the valve. Gas flow through an injection passage extending between the central flow passage and the external valve surface is controlled by a resilient tubular control sleeve which selectively engages an annular valve seat. A pressurized fluid contained in an hydraulic linkage chamber extending behind the control sleeve biases the sleeve into engagement with the seat. The hydraulic fluid pressure is regulated by the combined forces of a coil spring and pressure induced forces acting on an axially movable tubular piston forming part of the hydraulic chamber. (17 claims)

• Assignee: EDB-82-087541
• Patent Number(s): US 3595315
• OSTI ID: 5666780
• Country of Publication: United States
• Language: English

Related Subjects

02 PETROLEUM
020300* -- Petroleum-- Drilling & Production
ARTIFICIAL LIFTS
CONSTRUCTION
CONTROL EQUIPMENT
COUPLINGS
DESIGN
ENGINEERING
ENHANCED RECOVERY
EQUIPMENT
FLOW REGULATORS
FLUID FLOW
FLUID INJECTION
FLUID MECHANICS
GAS FLOW
GAS INJECTION
GAS LIFTS
HYDRAULICS
INJECTION WELLS
MECHANICS
NATURAL GAS WELLS
OIL WELLS
PRESSURE DEPENDENCE
PRESSURIZING
RECOVERY
TUBES
VALVES
WELLS