WELL OPERATION METHOD Russian patent published in 2007 - IPC E21B43/18 

FIELD: oil production industry, particularly well operation, oil production stimulation by producing bed reservoir cleaning of contaminants and well output recovery.

SUBSTANCE: method involves lowering assembly connected to flow string in well perforation interval, wherein the assembly comprises packer, sucker-rod pump with body having central orifice, rod string with plunger and ultrasonic generator; isolating tube space over perforation interval with packer; acting by elastic ultrasonic oscillations on well bottom zone, wherein the elastic ultrasonic oscillations are generated in active technological liquid and acid solution; pumping out reaction products simultaneously with washing out treatment products; providing alternating liquid flow within perforation interval and creating weak depression pulses. The ultrasonic generator is mechanical acoustic generator arranged in central body orifices. The generator is activated by liquid flow passing through the generator. Reaction products are pumped out in intensive mode for 48-72 hours. After that pump is switched into operational regime in which amplitude and number of pumping operations is selected to provide 1.0-1.5 MPa pressure difference in under-packer zone up to 10-15 times oil viscosity reduction.

EFFECT: increased efficiency of well and well bottom zone cleaning, increased output, simplified technology and decreased costs.

1 ex, 2 dwg