Self closing equalizing valve for a subsurface well safety valve

Details Self closing equalizing valve for a subsurface well safety valve Self closing equalizing valve for a subsurface well safety valve

1987-03-12

1988-02-02

Novosad, Stephen J.

Wells

Valves, closures or changeable restrictors

Fluid operated

E21B 3412

Patent

active

047223995

ABSTRACT:
A hydraulically actuated subsurface safety valve for controlling fluid flow through a well tubing by actuating a first piston and cylinder assembly through a fluid passageway. A positive valve seat and valve element closes the flow of fluid to the assembly when the safety valve is opened. An equalizing valve is provided in an equalizing line and is actuated by a second piston and cylinder assembly through a fluid communication line downstream of the positive valve seat and element. A fluid bypass bypasses the second piston and cylinder assembly for bleeding off the opening pressure to the equalizing valve for allowing the equalizing valve to be biased to the closed position.

REFERENCES:
patent: 4103744 (1978-08-01), Akkerman
patent: 4140153 (1979-02-01), Deaton
patent: 4325431 (1982-04-01), Akkerman
patent: 4454913 (1984-06-01), Guidry et al.
patent: 4527630 (1985-07-01), Pringle
patent: 4569398 (1986-02-01), Pringle
patent: 4629002 (1986-12-01), Pringle

Affiliated with

Also associated with

Rating

Self closing equalizing valve for a subsurface well safety valve does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Self closing equalizing valve for a subsurface well safety valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self closing equalizing valve for a subsurface well safety valve will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1632371