FIELD: geological prospecting. SUBSTANCE: pneumatic tool for decolmatage of wells and filters has body 1 with ports for air discharge, air admission inlet 2 and shut-off valve 3. Installed in lower part of ports on inner surface of body 1 are deflectors 8 which separate the flow into jets at its discharge into well and may be made in form of tubular members. Ports are made in form of perforations. EFFECT: higher efficiency. 2 cl, 3 dwg
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