Split stack blowout prevention system

Details Split stack blowout prevention system Split stack blowout prevention system

1978-04-14

1980-03-18

Leppink, James A.

Wells

Submerged well

Means removably connected to permanent well structure

166 55, 405211, E21B 712

Patent

active

041934555

ABSTRACT:
A blowout prevention system for an offshore structure positioned on the underwater bottom in a body of water which contains moving ice masses that could force the structure off location wherein a surface blowout preventer stack for conventional well control is connected to the upper end of a riser with the lower end of the riser being disconnectably connected to a subsurface blowout preventer stack which provides the necessary well control should the structure be forced off location. The subsurface stack is positioned on a wellhead located in a chamber in the subsea bottom and is disconnectably connected to the riser so that the riser may be quickly removed from the subsea bottom should the structure be forced off location.

REFERENCES:
patent: 3179179 (1965-04-01), Kofahl
patent: 3189098 (1965-06-01), Haeber
patent: 3195639 (1965-07-01), Pollard et al.
patent: 3324943 (1967-06-01), Price
patent: 3461957 (1969-08-01), West
patent: 3561526 (1971-02-01), Williams, Jr. et al.
patent: 3592263 (1971-07-01), Nelson
patent: 3793840 (1974-02-01), Mott et al.
patent: 3866676 (1975-02-01), Burns
patent: 3871184 (1975-03-01), Schirtzinger
patent: 4046191 (1977-09-01), Neath
patent: 4080797 (1978-03-01), Thompson

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