FIELD: oil-and-gas production.
SUBSTANCE: proposed set comprises deflecting wedge with anchoring mechanism made up of shaped tube with stopped bottom end, hydraulic line communicating drill pipe inner space with that of said shaped tube, and milling tool fitted atop said deflecting wedge. Said milling tool comprises thrust ring fitted on its body and made up of plain bearing with outer diameter exceeding that of said tool by clearance that prevents contact between hard-alloyed milling tool cutting edges and deflecting wedge guide surface. Blades on milling tool extend at right angle above tool body. Besides, proposed set comprises two-position flushing assembly to shut off hydrodynamic channel of communication between hole clearance and tube side.
EFFECT: higher efficiency and reliability.
6 dwg
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