COMPLEX OF MULTIFUNCTIONAL CLEANING OF WELLS WITH CONTROLLED IMPLOSION-DEPRESSION EFFECT ON BOTTOMHOLE FORMATION ZONE AND METHOD OF MULTIFUNCTIONAL CLEANING OF WELLS Russian patent published in 2025 - IPC E21B37/00 

FIELD: obtaining oil and gas from wells.

SUBSTANCE: group of inventions relates to the oil and gas industry and is intended for cleaning the bottomhole formation zone (BFZ). Well cleaning device with controlled implosion-depression action on the bottomhole formation zone, lowered on the tubing string, includes a device for removing plugs, a check valve, a tubing container, an implosion valve, liquid filtration device (LFD), which includes a collar disconnector of the annular space with an output perforated nozzle, a slotted filter and a through channel; as well as a throttle coupling connected to the knock-down valve. Between the LFD and the throttle coupling there is a device for controlled implosion-depression treatment (CIDT), which includes a collar disconnector of the annular space with an output perforated branch pipe, a slotted filter and a through channel, and an upper container with a self-contained pressure gauge. Between the device for removing plugs and the check valve there is a lower container with an independent pressure gauge.

EFFECT: improving efficiency and efficiency of cleaning of filtration channels of bottomhole formation zone from colmatant, borehole and bottomhole of mechanical impurities during current and capital repairs of wells.

12 cl, 3 dwg