Patent · US Active

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

US9950293B2 · kind B2 · utility

1Cited by

2References

24Claims

0Family size

Assignee

STATOIL PETROLEUM AS · NO

Inventors

Baard Kaasa · Trondheim, NO
Bernt Henning Rusten · Trondheim, NO
Knut Arild Maråk · Trondheim, NO
Arne Olav Fredheim · Trondheim, NO

Key dates

Filing date	Jul 1, 2011
Grant date	Apr 24, 2018
Priority date	—
Expiry date	Apr 24, 2033

Classification

Technology area (CPC B)Performing Operations; Transporting
CPC primaryB01D2256/245
WIPO fieldChemical engineering
WIPO sectorChemistry

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 manner 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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.