CONE BIT Russian patent published in 2020 - IPC E21B10/16 

FIELD: mining.

SUBSTANCE: invention relates to drilling equipment and can be used in production of drill bits intended for drilling wells. Rolling bit comprises sections with legs and rolling cutters movably fixed on them, which are equipped with rims of rock-destructing elements, tops of which at edges of ends are equipped with projecting contours in the form of closed rectangles or circles, and bottom inside contour is made concave relative to tops of ends. On the concave bottom there is additionally inclined hole with output to the side working surface of the element for the broken slurry coming out into the cavity of the concaved bottom during drilling. Shape of rock-destructing elements provides constant increased specific pressure on rock of bottomhole during entire operation of bit at the bottom, avoiding slump delay inside closed contour of rock-destructing projections on top of elements.

EFFECT: in total with high resistance of the frame from impact loads and abrasion of the working top of the element, this increases mechanical speed of drilling and driving to the bit.

5 cl, 4 dwg