DRILLING CHISEL WITH VARIABLE ROCK-DESTROYING ARMAMENT Russian patent published in 2005 - IPC

FIELD: mining industry.

SUBSTANCE: device has body with ribs, on which rock-destroying armament is placed, body is made replaceable, of four-groove or three-groove manufacture form, while during drilling of hard rocks four toothed disk cutters are mounted on axis on it, in grooves placed cross-wise between ribs and symmetrically in mutually perpendicular diametric planes, and during drilling of rock of average or lower hardness in space of grooves between ribs four-vertex or three-vertex transfer parts are placed having rectangular U-like profile, wherein replaceable cutter holders are inserted, provided with detachable cutters with different shapes of hard-alloy heads and tails, slant angles to well axis, height marks and placement plans in replaceable cutter holder, dependently on chisel diameter and geological conditions of planned drilling. Connection to transfer part body and replaceable cutter holders with replaceable cutters is made by means of same axes that were used for mounting toothed-disk cutters, while all elements of changeable armament are made replaceable and collapsible.

EFFECT: higher efficiency.

4 cl, 14 dwg