METHOD FOR APPLYING ACTION TO BOTTOMHOLE FORMATION ZONE OF PRODUCTION WELL Russian patent published in 2006 - IPC E21B43/25 

FIELD: oil production industry, particularly to treat bottomhole formation zone by flexural working agent vibrations.

SUBSTANCE: method involves lowering hydraulic oscillator suspended to piped into well; generating flexural oscillations by submersed high velocity working agent jets in bottomhole formation zone by injecting thereof in amount of not less than 1.5-2 well volumes under elevated pressure; moving hydraulic oscillator along perforation interval; back-flushing the well. The hydraulic oscillator lowering in well is carried out with the use of check valve and filter. The flexural vibrations are provided by working agent jets crossing at an angle of 90-135°. Hydraulic oscillator movement is performed along with rotation thereof. The bottomhole formation zone is treated in at least two modes: at the beginning of treatment operation low-frequency vibrations are generated and then high-frequency generations are created.

EFFECT: increased efficiency of bottomhole formation zone treatment and reduced time of cleaning thereof.

1 dwg