METHOD AND TOOL FOR CONSTRUCTION OF FILTERING WELL Russian patent published in 2005 - IPC

FIELD: mining industry.

SUBSTANCE: method includes mounting tool with filtering channel on well shaft. Soil backfill is fed and washed. Washing liquid is fed range-wise through streaming device. Washing liquid is fed with direction of jets into ring-shaped hollow between well shaft walls and filtering column walls from calculation of ceiling by streams of cross-section of ring-shaped hollow. Tool has filtering column with soil backfill and exposure tank, wherein check valve is mounted, tool also has washing pipe with blocking means and check valve, fixed to exposure tank with possible disconnection. Tool is also provided with streaming device, mounted between blocking means. Streaming device is made in form of ring-shaped nozzles set. Nozzles are formed by spherical rinds, curvature radiuses of which are taken with center at axis of filtering column, with cylindrical support portions, uppermost of which are made with radial channels for feeding washing liquid through them with direction of streams from calculation of overlapping by them of cross-section of ring-shaped hollow between well shaft walls and filtering column walls.

EFFECT: higher efficiency.

2 cl, 2 dwg, 1 ex