Well valve

Details Well valve Well valve

1988-04-11

1989-05-30

Novosad, Stephen J.

Wells

Packers or plugs

With controllable passage between central chamber and space...

166184, 166317, 166318, 166319, 166374, E21B 3410

Patent

active

048341762

ABSTRACT:
A sleeve type valve useful in a well tubing string for controlling flow between the valve interior and exterior. An internal pressure balanced sleeve is releasably positioned to the valve body closing a flow port in the valve body wall to flow. The valve has an external pressure unbalanced sleeve also releasably positioned to close the port to flow. When the internal sleeve is moved to a position opening the port to flow, pressure may be increased in the valve interior to act through the port on the unbalanced sleeve, moving this sleeve to a position also opening the port to flow and permitting flow between the valve interior and exterior. The body has profiled grooving and a seal bore above the port and a seal bore below the port in which a locking mandrel may lock and seal, reclosing the port to flow.

REFERENCES:
patent: 2988145 (1961-06-01), Clark, Jr.
patent: 3572434 (1971-03-01), Ecuer
patent: 3981360 (1976-09-01), Marathe
patent: 4220206 (1980-09-01), Van Winkle
patent: 4574894 (1986-03-01), Jadwin
General Sales Catalog (OEC 5338), Mar. 1985, Otis Engineering Corporation, P.O. Box 819052, Dallas, Tex. 75381-9052, p. 91.

Affiliated with

Also associated with

Rating

Well 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 Well valve, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Well valve will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2145617