METHOD OF PREPARING ASSOCIATED PETROLEUM GAS FOR TRANSPORTATION Russian patent published in 2020 - IPC F25J3/00 

FIELD: oil and gas industry.

SUBSTANCE: invention relates to oil and gas industry, in particular, to preparation and processing of associated petroleum gas. Method for preparation of associated petroleum gas includes multistage separation of oil with branch at each stage of separation of associated petroleum gas and oil, cooling of associated petroleum gas from first stage of separation, separation of light liquid hydrocarbons from it and its further supply to external transport pipeline, compression of gas from second and subsequent separation stages in liquid-ring compressor, cooling the gas mixture and circulating working fluid leaving the liquid-ring compressor, separating the compressed gas from the working fluid and recovering light liquid hydrocarbons therefrom. Circulating working fluid is directed for cooling of associated petroleum gas of the first stage of separation with its further supply to inlet of liquid-ring compressor.

EFFECT: invention increases efficiency of operation of the system for collecting and transporting associated petroleum gas due to more complete separation of light liquid hydrocarbons from gas of the first separation stage and prevention of condensate loss in the pipeline of external transport.

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