Boring or penetrating the earth – Boring a submerged formation – Boring from floating support with submerged independent...
Patent
1996-04-26
1998-12-15
Dang, Hoang C.
Boring or penetrating the earth
Boring a submerged formation
Boring from floating support with submerged independent...
E21B 7128
Patent
active
058486569
ABSTRACT:
The present invention relates to a device for controlling underwater pressure, which device is adapted for use in drilling installation comprising subsea blow-out preventer (1) and surface blow-out preventer (2) wherebetween a riser (3) is arranged for communication, and for the purpose of defining a device in which the use of choke line and kill line can be avoided, it is according to the invention suggested that the device comprises a high pressure riser (3) and a high pressure drilling pipe (14) which are so arranged between the subsea blow-out preventer (1) and the surface blow-out preventer (2) that they can be used two separate high pressure lines as a substitute for choke line and kill line.
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patent: 5184686 (1993-02-01), Gonzales
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patent: 5533574 (1996-07-01), Gonzalez
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