METHOD AND A SYSTEM FOR DRAIN LIQUID COLLECTION AND EVACUATION IN A SUBSEA COMPRESSION SYSTEM
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United States of America Patent
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Issued Date -
Oct 30, 2014
app pub date -
Apr 30, 2014
filing date -
Apr 30, 2013
priority date (Note) -
Abandoned
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Abstract
A method for drain liquid collection and evacuation in a subsea compression system using a compressor, wherein an external drainage tank is arranged in direct flow communication with the compressor sump via a sump evacuation valve, the tank is set under compressor discharge pressure via a tank pressurizing line arranged to connect the tank to a compressor discharge flow upstream of a throttle valve, a tank evacuation line is arranged to connect the tank to the compressor discharge downstream of the throttle valve, drain liquid evacuation is accomplished through generation, by adjusting the throttle valve, of a flow restriction in the compressor discharge. The tank is set under compressor discharge pressure by opening of the pressure valve and the drain liquid flow is permitted into a reduced compressor discharge pressure downstream the throttle valve by opening an evacuation valve in the evacuation line.
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