WELL JET PUMPING UNIT FOR DEGASSING OF COAL BEDS Russian patent published in 2010 - IPC F04F5/54 E21F7/00 

FIELD: mining.

SUBSTANCE: plant comprises jet pump 2 installed on pipe string 1 in well passing through coal beds 3. Pump 2 is installed in lower part of pipe string 1, length of which is more than depth of lower coal bed 3 occurrence. On lower part of pipe string 1, below lower bed 3 foot, there is lower support ring 4 installed, to lower part of which on adapter 5 there is a block-filter 6 fixed. Higher along pipe string 1, over roof of upper bed 3, there is an upper support ring 7 installed with relief windows 8. On outer surface of pipe string 1 under windows 8 over roof of upper bed 3 there is packer 9 installed. On ring 4 there is body 10 of pump 2 installed with a mount seat for detachable insert 11 with nozzle and mixing chamber with diffuser. Insert has channel 12 for discharge of working and pumped mediums mixture and channel 13 for supply of medium pumped from well with a check valve 14. In upper part body 10 is connected to lower part of pipe 15 of working medium supply equipped at upper end with sealing element 16 installed on ring 7 and inlet funnel 17 to collect detachable insert.

EFFECT: improved efficiency of pumping unit operation with availability of liquid and gas phases and solid mechanical admixtures in pumped medium.

1 dwg