FIELD: oil extracting industry.
SUBSTANCE: device has body, cylinder, a rod with compactors. Cylinder is made perforated along hole length. Rod is placed in the cylinder with means for covering a portion of perforation apertures and has a disc valve for covering the inlet. Body is provided with stopping screws for fixing the rod in certain position.
EFFECT: simplified construction of connecting pipe and means for cleaning its apertures when water pumping is stopped.
1 dwg
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