FIELD: mining engineering.
SUBSTANCE: window cutting system for use in a subterranean well includes a window milling cutter having selectively retractable and extendable blades, and a wedge deflector assembly having at least one receiving portion. The window eraser is attached to the knuckle-wedge assembly by inserting said blades into said receiving portion. When the window opening method is performed in the underground well fixation, the hole fastening is cut through a window milling cutter, retracts the milling cutter blades to expose the windows, and extends the blades in the knuckle assembly, thereby affixing the wedge-deflector assembly to the window milling cutter.
EFFECT: reduction of tripping operations.
22 cl, 8 dwg
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