Pressure equalizing plunger valve for downhole use

Details Pressure equalizing plunger valve for downhole use Pressure equalizing plunger valve for downhole use

2005-02-01

2005-02-01

Bagnell, David (Department: 3672)

Wells

Valves, closures or changeable restrictors

Longitudinally movable operator

C166S332800, C166S324000

Reexamination Certificate

active

06848509

ABSTRACT:
An equalizer valve for a flapper in an SSV has one embodiment where the plunger body is covered with a lubricious material in the bore in the flapper to counteract wear caused by off-center contact with the plunger by the flow tube. In another embodiment the flow tube and the plunger have matching angled surfaces to reduce the resultant moment of the plunger from offset contact of the flow tube. In another embodiment the flow tube contacts the plunger on center to eliminate a resultant moment, which can cause wear in the flapper bore or to the plunger.

REFERENCES:
patent: 3788595 (1974-01-01), Colonna
patent: 3875684 (1975-04-01), Henneman
patent: 4207084 (1980-06-01), Gardner
patent: 4401063 (1983-08-01), Haase
patent: 4411316 (1983-10-01), Carmody
patent: 4415036 (1983-11-01), Carmody et al.
patent: 4475599 (1984-10-01), Akkerman
patent: 4478286 (1984-10-01), Fineberg
patent: 5127807 (1992-07-01), Eslinger
patent: 6079497 (2000-06-01), Johnston et al.
patent: 6283217 (2001-09-01), Deaton
patent: 6296061 (2001-10-01), Leismer
patent: WO 9857029 (1998-12-01), None
Sides, et al., “Controlling Self-Equalizing Velocity Extends Valve Life,” Petreleum Engineer International, 64(1992), 2 pages.

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