METHOD FOR GASEOUS HYDROCARBON PREPARATION FOR TRANSPORTATION Russian patent published in 2007 - IPC E21B43/34 

FIELD: oil and gas industries, particularly gaseous hydrocarbon treatment with the use of low-temperature operation for preconditioning of product extracted from gas-condensate field.

SUBSTANCE: method involves supplying gas from well clusters to technological three-stage separation line; cooling gas upstream of intermediate separator in the first heat-exchanger and low-temperature separator by means of the second heat-exchanger and throttling effect, wherein technological line pressure is reduced in two stages. At the first stage pressure is reduced upstream of low-temperature separator along with provision of predetermined pressure and temperature in the separator. Then pressure is reduced in reverse gas flow upstream of the first heat-exchanger to obtain pressure, which provides gas movement to booster compressor station inlet.

EFFECT: possibility to use booster compressor plants after gas preparation plants, provision of instable condensate supply from gas preparation plant for condensate preconditioning without pump usage and increased extraction of heavy hydrocarbons in liquid phase.

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