DEVICE FOR SELECTIVE CLEANING OF PERFORATION CHANNELS AND BOTTOMHOLE FORMATION ZONE OF CONVENTIONALLY UNLIMITED THICKNESS

摘要

FIELD: oil and gas industry. ^ SUBSTANCE: device comprises a working element with channels installed on a lifting pipe (LP) with limitation of axial displacement. There is an opportunity to move the LP with the working element installed on it along the section of a perforated casing string, which performs the function of the device vessel. The LP may radially move relative to the vessel. The working element with one or several channels on the outer surface is coaxial to the device vessel. The LP may radially move relative to the working element. ^ EFFECT: increased efficiency of a device. ^ 3 cl, 3 dwg