Method and system for subsea processing of multiphase well effluents

A method and system are disclosed for subsea processing multiphase well effluents comprising natural gas and liquid from a subsea hydrocarbon containing formation, which system (1) comprises: - a fluid separation vessel (6) which is connected to a downstream end of a multiphase well effluent transpo...

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Bibliographic Details
Main Author SVEIN AUDUN HAHEIM
Format Patent
LanguageEnglish
Published 04.02.2010
Subjects
EARTH DRILLING
EARTH DRILLING, e.g. DEEP DRILLING
FIXED CONSTRUCTIONS
MINING
OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR ASLURRY OF MINERALS FROM WELLS
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Summary:A method and system are disclosed for subsea processing multiphase well effluents comprising natural gas and liquid from a subsea hydrocarbon containing formation, which system (1) comprises: - a fluid separation vessel (6) which is connected to a downstream end of a multiphase well effluent transportation conduit (7); - a liquid level transmitter assembly (21,22) for monitoring the gas liquid interface (23) in the fluid separation vessel (6); - a liquid enriched fluid transportation flowline (14) connected at or near the bottom (13) of the fluid separation vessel (6) and a gas enriched fluid transportation flowline (12) connected at or near a top (11) of the fluid separation vessel (6); - a pump (17) connected to an electric motor (18); and - a fast acting variable speed drive system, which is coupled to the liquid level controller which adjusts the pump and motor speed setpoint within 2 seconds to maintain the liquid level in the vessel at a predetermined setpoint.
Bibliography:Application Number: AU20090276524