Gas separation: processes – Degasification of liquid – Plural successive degassing treatments
Reexamination Certificate
2005-05-17
2005-05-17
Chiesa, Richard L. (Department: 1724)
Gas separation: processes
Degasification of liquid
Plural successive degassing treatments
C095S258000, C095S259000, C096S155000, C096S187000, C166S267000, C166S354000, C166S357000
Reexamination Certificate
active
06893486
ABSTRACT:
A method and system for sea-based handling/treatment of fluid hydrocarbons (oil) with associated gas include a first separation step in a high-pressure separator (18) installed on the sea bed, from which is output an oil flow containing an essentially predefined percentage of residual gas. The oil containing residual gas is carried through a riser (22) up to a surface vessel/production ship (12), where it is subjected to a second separation step in a second separator (24) incorporated in a low-pressure surface plant on board the vessel (12), this separated residual gas being used as fuel for direct/indirect generation of electric power for the operation of the underwater and above-water sections of the system. Water and gas produced in the first separation step is returned to a suitable reservoir by the use of a multiphase pump.
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Grendstad Jens
Inderberg Olav
Sanderford Morten
Torkildsen Bernt Helge
Tveit Egil
Andrus Sceales Starke & Sawall LLP
Chiesa Richard L.
Framo Engineering AS
Kongsberg Offshore AS
Navion ASA
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