DEVICE FOR PULSED STIMULATION OF BED Russian patent published in 1997 - IPC

FIELD: mining industry; may be used in intensification of mining of loose minerals through borehole, in geological prospecting for decolmatage of borehole zone. SUBSTANCE: device includes string of agent supplying pipes consisting of sections separated by seats for trip valve. Diameter of hole of each lower seat is smaller than that of overlaying one. Installed concentrically relative to every section of agent supplying pipes is bypass pipe which forms annular hollow by its internal surface together with external surface of agent supplying pipe. Made in each section of agent-supplying pipe are inlet channels located under its seat, and outlet channels located under seat of adjacent underlaying section. Channels communicate annular hollow of bypass pipe with internal hollow of section of agent-supplying pipe. EFFECT: increased oil mobility in formations. 2 cl, 3 dwg