Subsurface safety valve

Details Subsurface safety valve Subsurface safety valve

1979-08-20

1981-09-08

Leppink, James A.

Wells

Valves, closures or changeable restrictors

Fluid operated

251 52, 251324, E21B 4312

Patent

active

042879540

ABSTRACT:
A subsurface safety valve having a flapper-like pivoting closure element that is moved to and from the open and closed positions by a reciprocating operator assembly. When moved to the open position, the closure element is pivoted out of the flow path to protect it from possible damage.

REFERENCES:
patent: 2780290 (1957-02-01), Natho
patent: 2798561 (1957-07-01), True
patent: 3189044 (1965-06-01), Sizer
patent: 3958633 (1976-05-01), Britch et al.
patent: 4009753 (1977-03-01), McGill et al.
patent: 4103744 (1978-08-01), Akkerman
patent: 4160478 (1979-07-01), Calhoun et al.

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