BIT FOR DIRECTED MECHANICAL ICE DRILLING Russian patent published in 2014 - IPC E21B10/02 

FIELD: mining.

SUBSTANCE: bit for directed mechanical drilling of ice includes a housing, on the end face of which there fixed are removable cutters located symmetrically in radial direction, where the front cutting edge of cutters has a straight shape and is developed inside the bit, and a core-cutter. At least four removable cutters and four removable restrictors of lateral introduction are installed, which are located symmetrically in radial direction between cutters and provided with an annular slot for fixation in radial direction relative to the bit housing, as well as with the corresponding hole for screw connection. Outer side surface of each cutter has an additional cutting edge.

EFFECT: enlarging capabilities of the device and improving reliability of well shaft construction in design direction.

7 dwg