METHOD AND DEVICE TO PERFORM ACTION ON WELL BOTTOM DURING OIL PRODUCTION Russian patent published in 2006 - IPC E21B43/16 E21B43/24 

FIELD: oil industry, particularly to stimulate oil recovery by applying action to oil bed.

SUBSTANCE: method involves applying dual-frequency vibroacoustic and thermal action to well bottom zone during oil production, wherein vibroacoustic and heat radiators are arranged within perforation zone under electric drive of down-pump; successively performing thermal and high-frequency vibroacoustic action on proximal bed zone during down-pump operation; performing low-frequency vibroacoustic action on remote bed zone after applying above thermal and high-frequency vibroacoustic action; performing control of above action through power supply cable of electric drive and dropender connecting vibroacoustic and heat radiators with the electric drive of down-pump. Downhole instrument is also provided with heat radiator connected to length-adjustable dropender over electric drive of down-pump. The down-pump is installed in well provided with tube strings. Electronic unit connected to control unit is also provided. The electronic unit is adapted to serially activate heat and high-frequency vibroacoustic radiators and then activate low-frequency vibroacoustic radiator after heat and high-frequency vibroacoustic radiators deactivation.

EFFECT: increased efficiency of bed stimulation due to increased oil inflow by applying vibroacoustic and thermal action to the bed and enlarged turnaround time of down-pump, reduced rate of paraffin and pyrobitumen deposition inside the pump due to oil heating.

2 cl, 1 dwg