METHOD FOR OIL EXTRACTION AND DEVICE FOR REALIZATION OF SAID METHOD Russian patent published in 2005 - IPC

FIELD: oil extractive industry.

SUBSTANCE: method includes use of casing column, comprising multiple hermetically engaged pipes. At bottom of lower pipe prior to perforated filter a dish valve is mounted, opened inside the pipe under effect of pressure change between oil bed and depression in casing pipe. At bottom of upper pipe by means of connecting pipes vacuum and compressor pipelines and oil raising pipeline are mounted, which goes down to the bottom of lower pipe. Then vacuum pump is used to form a depression in casing pipe, to provide for higher well debit. Through dish valve a portion of oil is let into casing pipe. After that compressor is used to form increased pressure in casing string and oil is pressed upwards along pipeline. Device comprises casing string of typical size, used for sucker-rod pumps. At head of pump a vacuum pipe is placed, connected by valve to vacuum pump and gas burner, compression pipe, connected by valve to compressor and oil-raising pipe, lowered to lower bottom of casing string. Upper end of this pipe through check vale is connected to station for preparation and transfer of oil. On lower bottom of casing string a dish valve is mounted with possible opening in case of depression in casing pipe, and a perforated filter.

EFFECT: higher productiveness.

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