| 摘要 |
FIELD: drilling of soil or rock.SUBSTANCE: invention relates to drilling equipment, in particular, to drill bit cutting structures. Drill bit includes housing with holes, in which there are hard-alloy inserts with shank and working head. Working head of each insert in a frontal plane is made in form of a truncated cone with a central recess. Truncated cone is formed with torus-shaped rings arranged at an angle to axis of shank and forming therebetween grooves for sludge removal, wherein tilt angle of torus-shaped rings coincides with direction of rotation of housing of drill bit.EFFECT: technical result is higher efficiency of drill bit operation.1 cl, 1 dwg |
