METHOD FOR LIQUIDATION AND STOPPAGE OF POLLUTION BY OIL AND GAS PRODUCING WELL AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2013 - IPC E21B37/00 

FIELD: oil and gas industry.

SUBSTANCE: heater is introduced into interior volume of the well and aligned with downhole device. In the upper section of downhole device oscillation is broadcasted by sound-emitting device in the plane perpendicular to the device axis. In the lower section of downhole device oscillation oriented downwards to the device axis is broadcasted by sound-emitting device. Downhole heater is supplied through DC line from controlled DC source included into the earth control station. Both sound-emitting devices are supplied from AC power line within commercial range of frequencies of (0.5-50) kHz from AC generator installed at the earth control station. Additional control of voltage and current is made at input power lines by AC current. Considering temperature of downhole device and amplitude of transverse acoustic oscillations acoustothermal parameters are set by adjustment of power costs and excitation frequency.

EFFECT: higher efficiency of cleaning.

6 cl, 1 dwg