Subsurface safety valves and seals

Details Subsurface safety valves and seals Subsurface safety valves and seals

1986-06-25

1988-06-07

Leppink, James A.

Wells

Valves, closures or changeable restrictors

Fluid operated

166322, 277 58, 277 62, 277236, E21B 3410

Patent

active

047490438

ABSTRACT:
Subsurface safety valves of the tubing and wireline retrieveable types operated by a control fluid responsive annular piston in an annular cylinder sealed at opposite ends by a two-way static and dynamic metal-to-metal seal assembly which includes central Bellville loading washers, a spacer ring on each side of the loading washers, and a Bellville sealing washer at each end of the spacer rings. The metal-to-metal seals are useful in a number of applications requiring the sealing of pressurized spaces between spaced concentric parts.

REFERENCES:
patent: 1166686 (1916-01-01), Holmes
patent: 2315012 (1943-03-01), Park
patent: 2720220 (1955-10-01), Gratzmuller
patent: 3477731 (1969-11-01), Workman
patent: 3865141 (1975-02-01), Young
patent: 4127168 (1978-11-01), Hanson et al.
patent: 4324407 (1982-04-01), Upham et al.
patent: 4451047 (1984-05-01), Herd et al.
patent: 4569398 (1986-02-01), Pringle

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