DOWNHOLE CLEANING TOOL AND CLEANING METHOD Russian patent published in 2018 - IPC E21B37/02 

FIELD: cleaning tools.

SUBSTANCE: group of inventions relates to a downhole cleaning tool for removing residues or precipitation solids on an inner face of a casing or liner. Apparatus comprises a tool body having a bore and a wall, at least one inlet in the wall of the tool body. Inlet being fluidly connected with the bore. Solid removing element connected with the tool body for releasing solids of the inner face of the casing or liner. Fluid cleaner section comprising a chamber, a filter within the chamber for separation of the solids from the fluid, and a pump fluidly connected with the bore for sucking fluid with released solids in through the inlet into the chamber. Solid removing element comprises at least one projecting part, projecting from the tool body. Near the projecting parts, at least one inlet may be arranged adjacent the projecting parts for suction of released solids.

EFFECT: improves the efficiency of sediment removal.

19 cl, 8 dwg