METHOD AND DEVICE FOR TREATMENT OF PERFORATION CHANNELS AND BOTTOMHOLE FORMATION ZONE WITH CONVENTIONALLY INFINITE THICKNESS Russian patent published in 2015 - IPC E21B37/00 

FIELD: oil and gas industry.

SUBSTANCE: method includes running in of a working part with channel or channels on its surface, which is placed at outer surface of the tubing string, up and down movement of the tubing string with overflow of working fluid filling the well bore through channel or channels in the working part. Overflow of working fluid from annular space below the working part to from annular space above the working part is made through bypass channel inside the tubing string bypassing channel or channels at surface of the working part in case of downward motion. Broken combatant is removed by fluid delivered from the formation with additional of working fluid to the tubing string from the surface without its pumping from the surface through the treated zone.

EFFECT: improved treatment efficiency without limitation of simultaneously treated thickness of the perforation interval.

5 cl, 3 dwg