FIELD: manufacturing technology.
SUBSTANCE: group of inventions relates to milling systems used for multilateral wells openings cutting. Device comprises elongated housing having first end, second end and free cutter opening, formed through housing section between first and second ends, cutter arranged with possibility of displacement inside housing, deflector unit arranged, at least, partially inside housing and in straight line with cutter opening to guide cutter from housing through cutter opening for casing pipe outlet milling through radially adjacent casing pipe, torque transfer coupling, connected to housing external part and passing through housing section between first and second ends to close, at least, section of cutter opening and increasing housing torsional resistance.
EFFECT: increasing milling system strength and reliability.
19 cl, 6 dwg
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