公开(公告)号：US20180200669A1

公开(公告)日：2018-07-19

申请号：US15923617

申请日：2018-03-16

Applicant: STATOIL PETROLEUM AS

Inventor： Baard KAASA ,  Bernt Henning RUSTEN ,  Knut Arild MARAK ,  Arne Olav FREDHEIM

IPC: B01D53/26 ,  C10L3/10

CPC classification number: B01D53/265 ,  B01D2256/245 ,  C10L3/106 ,  C10L3/107

Abstract: 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.