METHOD OF TREATMENT OF BOTTOMHOLE ZONE OF BED Russian patent published in 2008 - IPC E21B43/25 

FIELD: oil and gas industry.

SUBSTANCE: invention refers to mining and can be used for development and rejuvenation of producing wells yield, reduced as a result of mudding of a bottomhole zone with asphalt-tar-paraffin formations and mechanical additives. The method of treatment of a bottomhole of a well includes formation of a depressive pressure drop between the bottomhole zone and a reservoir of the well by means of a shock wave, relocating in the well reservoir and creating recurrent pressure impulses in the bottomhole zone. The said shock wave occurs with alternate opening of the well reservoir at the mouth of the well for well fluid under pressure flowing out, and with its closing by means of valves. One of these - the fluid discharge valve - connects the well reservoir with a discharge reservoir; the second - the fluid refill valve - connects the well reservoir with the fluid source under pressure. Opening and closing of the well reservoir at the mouth for discharge of the well fluid under pressure is performed by means of the fluid discharge valve. Pressure in the well is from time to time raised by means of connection of the mouth of the well with the fluid source under pressure when the fluid refill valve is opened. Opening and closing of the well reservoir at the mouth is performed so, that vacuum and pressure spaces of the shock wave relocating in the well reservoir coincided in the phase with periodical dropping and rising of pressure in the bottomhole zone.

EFFECT: achieving the efficient method of bed bottomhole zone treatment by means of increasing amplitude of a damped standing wave in the bottomhole zone when this wave if transferring in the well reservoir.