DIAMOND BORE BIT Russian patent published in 2014 - IPC E21B10/48 

FIELD: mining.

SUBSTANCE: diamond bore bit comprises a body and a diamond-containing matrix divided by washing slots into sectors and comprising an impregnated and intermediate layers, the latter of which is made with a circular ledge interacting with the response well of the impregnated layer. The circular ledge of the intermediate layer is made with reservoirs for abrasive material, evenly arranged along the entire circumference of the circular ledge, at the same time reservoirs for abrasive material are arranged in each sector and equipped with bushings, the outlet part of which in the initial position is covered with a matrix material and arranged in the front part of the sector. Some bushings for the abrasive material may be made with a fork shape, besides, their output sections are directed towards the well-core-forming parts of the matrix. Sectors with fork-shaped bushings may be arranged with alternation with sectors equipped with one bushing arranged in the middle part of the front face of the sector.

EFFECT: increased efficiency of bit operation.

3 cl, 2 dwg