METHOD TO EXTRACT METHANE FROM COAL BED Russian patent published in 2015 - IPC E21F7/00 

FIELD: mining.

SUBSTANCE: invention relates to the mining industry and may be used to extract methane from a coal bed. The method includes opening of a coal bed with a well from the surface, its casing with pipes, plugging of the annular space, perforation of the casing string, hydraulic separation of the bed, maintenance of a working fluid in the bed and its displacement from filtering cracks into the remote area of the bed, extraction of methane in the self-flowing mode until the well exhaustion. At the same time with the purpose to additionally extract methane they pump ozone, having higher efficiency of substitution by volume of desorbed methane, compared to nitrogen, air, carbon oxide and carbonic acid gas in the volume determined according to special formula.

EFFECT: more complete extraction of methane from coal beds.

1 dwg