Equalizing flapper for high slam rate applications

Details Equalizing flapper for high slam rate applications Equalizing flapper for high slam rate applications

2007-04-17

2007-04-17

Bagnell, David (Department: 3672)

Wells

Valves, closures or changeable restrictors

Fluid operated

C166S325000, C166S332700, C166S332800

Reexamination Certificate

active

11031585

ABSTRACT:
A flapper valve assembly is described having an equalizing port assembly with a bleed valve member that is moveable between an open position and a closed position. The equalizing port assembly features a structural support member in the form of a retainer key that is secured to the flapper valve member both axially and radially. Additionally, a compressible spring is located between the structural support member and provides biasing force upon the valve member to urge it toward a closed position. Additionally, the flapper valve member presents a pair of raised, substantially flat actuator contact portions upon its downstream face to meet an actuating tube in a mating contact arrangement and resist material deformation that could tend to clog or block the equalizing fluid flow port.

REFERENCES:
patent: 1850094 (1932-03-01), Dean
patent: 4415036 (1983-11-01), Carmody et al.
patent: 4475599 (1984-10-01), Akkerman
patent: 4478286 (1984-10-01), Fineberg
patent: 6079497 (2000-06-01), Johnston et al.
patent: 6296061 (2001-10-01), Leismer
patent: 6644408 (2003-11-01), Ives
patent: 6666271 (2003-12-01), Deaton et al.
patent: WO 9857029 (1998-12-01), None

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