Fluid handling – Systems – Sequentially progressive opening or closing of plural valves
Patent
1982-03-15
1984-05-15
Nilson, Robert G.
Fluid handling
Systems
Sequentially progressive opening or closing of plural valves
166324, 166332, 251 58, F16K 31163
Patent
active
044482167
ABSTRACT:
A surface controlled subsurface safety valve having a ball type valve closure. The ball member and its associated components are protected from damage by preventing excessive control fluid pressure from applying force to the ball member. Also, rotation of the ball member is prevented until any difference in pressure across the ball member and its seating surface has decreased below a preselected safe value.
REFERENCES:
patent: 3703193 (1972-11-01), Raulins
patent: 3826462 (1974-07-01), Taylor
patent: 3865141 (1975-02-01), Young
Crow Robert W.
Mondon Cary G.
Schwendemann Kenneth L.
Speegle Steven C.
Vinzant Michael B.
Felger Thomas R.
Nilson Robert G.
Otis Engineering Corporation
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