CUTTING FACILITY Russian patent published in 2003 - IPC

FIELD: mining industry, cutting sections of pipe string in hole. SUBSTANCE: cutting facility includes body with grooves, cutters with upper and lower supporting planes hinged in them and hydraulic drive in the form of piston with rod to move cutters. End part of hydraulic drive interacts with internal surface of cutters. Upper supporting planes of cutters are cut at acute angle with axis of body and are fitted with separable calibrated plate. Grooves of body have surfaces corresponding to supporting planes of cutters. Angle between upper supporting plane of cutters and axis of body amounts to 30-to 40 degrees. EFFECT: widened technological potential of cutting facility that can cut out sections of string and bore string of any required diameter. 1 cl, 3 dwg