A method and system for lowering the water dew point of a hydrocarbon fluid stream subsea

The present invention concerns a method for lowering the water dew point subsea in a produced multiphase hydrocarbon fluid stream containing water, the method comprising the steps of: separating (10) the hydrocarbon fluid stream (1) into a liquid phase (3) and a first gas phase (2); cooling (20) the...

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Bibliographische Detailangaben
Hauptverfasser:	Knut Arild Maråk, Baard Kaasa, Bernt Henning Rusten
Format:	Patent
Sprache:	eng
Schlagworte:	ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE ORUNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL BLASTING CHEMISTRY COMBINED HEATING AND REFRIGERATION SYSTEMS FIRELIGHTERS FUELS FUELS NOT OTHERWISE PROVIDED FOR HEAT PUMP SYSTEMS HEATING LIGHTING LIQUEFACTION SOLIDIFICATION OF GASES LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS LIQUEFIED PETROLEUM GAS LUBRICANTS MANUFACTURE OR STORAGE OF ICE MECHANICAL ENGINEERING METALLURGY MIXTURES BY PRESSURE AND COLD TREATMENT NATURAL GAS PEAT PERFORMING OPERATIONS PETROLEUM, GAS OR COKE INDUSTRIES PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL REFRIGERATION OR COOLING SEPARATION SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BYSUBCLASSES C10G, C10K TECHNICAL GASES CONTAINING CARBON MONOXIDE TRANSPORTING WEAPONS
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Beschreibung
Zusammenfassung:	The present invention concerns a method for lowering the water dew point subsea in a produced multiphase hydrocarbon fluid stream containing water, the method comprising the steps of: separating (10) the hydrocarbon fluid stream (1) into a liquid phase (3) and a first gas phase (2); cooling (20) the first gas phase in a controlled mariner to knock out water or condensing water and optionally other condensates while keeping the fluid above a hydrate formation temperature thereof; separating off condensed liquids (6) and a second gas phase; wherein the second gas phase (8) has a water dew point which is lower than that of the initial multiphase hydrocarbon fluid stream. The invention also concerns a system for lowering the water dew point subsea.