Wells – Valves – closures or changeable restrictors – Fluid operated
Patent
1993-09-03
1994-06-28
Neuder, William P.
Wells
Valves, closures or changeable restrictors
Fluid operated
251303, 251366, E21B 3410
Patent
active
053238591
ABSTRACT:
A subsurface safety valve has a valve seat and an upwardly closing flapper plate whose sealing surfaces each have a matched spherical radius of curvature. The sealing surface of the valve seat is a concave spherical segment and the sealing surface of the flapper plate is a convex spherical segment. The matching spherical surfaces are lapped together to provide a metal-to-metal seal along the interface between the nested convex and concave sealing surfaces. This permits angular displacement of the flapper plate relative to the valve seat without interrupting positive sealing engagement. The concave spherical seating surface of the safety valve seat will tolerate a limited amount of misalignment of the flapper plate which sometimes occurs during operation of the safety valve under high flow rate, high differential pressure conditions.
REFERENCES:
patent: 2162578 (1939-06-01), Hacker
patent: 3071151 (1963-01-01), Sizer
patent: 3865141 (1975-02-01), Young
patent: 3955623 (1976-05-01), Aumann
patent: 4077473 (1978-03-01), Watkins
patent: 4160484 (1979-07-01), Watkins
patent: 4161960 (1979-07-01), Watkins
patent: 4376464 (1983-03-01), Crow
patent: 4378847 (1983-04-01), Patel et al.
patent: 4449587 (1984-05-01), Rodenberger et al.
patent: 4457376 (1985-07-01), Carmody et al.
patent: 4531587 (1985-07-01), Fineberg
patent: 4583596 (1986-04-01), Davis
patent: 4605070 (1986-08-01), Morris
patent: 4674575 (1987-06-01), Guess
patent: 4723606 (1988-02-01), Vinzant et al.
patent: 4834183 (1989-05-01), Vinzant et al.
patent: 4854387 (1989-08-01), Pringle
patent: 4890674 (1990-01-01), Le
Dickson Rennie L.
Hines Craig D.
Smith Roddie R.
Druce Tracy W.
Griggs Dennis T.
Halliburton Company
Neuder William P.
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