Method of cooling a multiphase well effluent stream

Details Method of cooling a multiphase well effluent stream Method of cooling a multiphase well effluent stream

2007-07-02

2011-11-15

Hopkins, Robert A (Department: 1776)

Gas separation: processes

Degasification of liquid

And subsequent handling of evolved gas, stripping gas, or...

C095S258000, C096S155000, C096S157000

Reexamination Certificate

active

08057580

ABSTRACT:
A method of processing a multiphase well effluent mixture comprises: transferring the multiphase well effluent mixture (G+L) via a multiphase well effluent flowline (3, 23) to a gas liquid separator (5, 24) in which the multiphase well effluent mixture is separated into substantially gaseous and liquid fractions; transferring the substantially liquid fraction L into a liquid flowline (7, 25) in which a liquid pump (8, 29) is arranged; transferring the substantially gaseous fraction into a gas flowline (6, 26) in which a gas compressor (10, 30) is arranged; protecting the gas compressor (10, 30) against pressure and/or liquid surges by recirculating a recycled gas stream (Ghot) via a gas recycling conduit (14, 44) through the gas compressor in response to detection of a pressure and/or liquid surge in the multiphase well effluent mixture; cooling the recycled gas stream by injecting cooled recycled liquid (Lcold) from the liquid flowline (7, 25) into the recycled gas stream (Ghot) which recycled liquid is cooled in a heat exchanger (9, 49), which may be a compact liquid-liquid heat exchanger that is about ten times smaller than a bulky gas-liquid heat exchanger that could be arranged in the gas recycling conduit (14, 44).

REFERENCES:
patent: 7063161 (2006-06-01), Butler et al.
patent: 319654 (2005-09-01), None
patent: WO03033870 (2003-04-01), None
patent: WO03035335 (2003-05-01), None
patent: WO2005026497 (2005-03-01), None
patent: WO2005040670 (2005-05-01), None
International Search Report dated Oct. 19, 2007 (PCT/NO2007/000248).

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