FIELD: mining.
SUBSTANCE: group of inventions relates to downhole operations used in well repair in oil industry. During borehole operations, such as tool milling (MHFF couplings, fraction ports), fragments and milling products are formed, which must be collected and removed from the well. Method of MHFF couplings milling includes installation of first column of tubing string into well; installation in the first string of the tubing string of the second tubing string with the hydraulic downhole motor and milling layout of the bottom of the string; milling and extraction of liquid worked by the downhole motor by means of gas lift.
EFFECT: reduced time of milling and cleaning; reducing the possibility of the produced liquid absorption by the bed and formation of sediment of the milling products, reducing labor intensity.
10 cl, 1 dwg
