FIELD: methods or apparatus for cleaning boreholes or wells, particularly equipment for metered supply reagents into wells.
SUBSTANCE: device has reagent container with partition, metering unit with valve activated under formation liquid pressure drop during pump operation and composite mixer. Composite mixer is made as a chamber with X-shaped partitions and constant magnets arranged on surface from wetted side thereof.
EFFECT: increased efficiency of reagent usage, increased overhaul life and reduced costs.
4 cl, 2 dwg
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