Inside blowout preventer

Details Inside blowout preventer Inside blowout preventer

1981-01-21

1983-09-13

Nilson, Robert G.

Fluid handling

Line condition change responsive valves

Direct response valves

137540, 166325, 175318, 251360, F16K 1502

Patent

active

044036280

ABSTRACT:
An inside blowout preventer including a valve seat pocket and a replaceable valve seat, the valve seat having a lip to bear the longitudinal back pressure in the presence of blowout type pressures from below without causing outward pressure of the pocket seat which cause distortions of the pin end in which the pocket is located.

REFERENCES:
patent: 1545851 (1925-07-01), Ritter
patent: 1872139 (1932-08-01), Gray
patent: 1959043 (1934-05-01), Todd
patent: 2063821 (1936-12-01), McKenzie
patent: 2179033 (1939-11-01), Cashion
patent: 2213309 (1940-09-01), Fortune
patent: 2260381 (1941-10-01), Kennon
patent: 2596832 (1952-05-01), Williams
patent: 3029835 (1962-04-01), Biello et al.
patent: 3537518 (1970-11-01), Sullivan
patent: 4270569 (1981-06-01), Regy et al.

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