ROCK DRILL CUTTER (VARIANTS) Russian patent published in 2012 - IPC E21B10/16 

FIELD: drilling equipment.

SUBSTANCE: the invention relates to drilling equipment, in particular, to design of rock drill cutters. The cutter comprises a frame with peripheral, middle and upper teeth rows. The section of the teeth row, which is adjacent to the peripheral teeth row and oriented towards it, is made in the form of solid of toothed disc which extrudes over the operational surface of the teeth row, furthermore, the disc has a trapezoid cross-section. The rock drill cutter with toothed disc has hard-alloy inserts positioned in the gaps between teeth, the inserts have operating head positioned on the same diameter with the operating surface of the toothed.

EFFECT: simplification of cutter design and reduction of drilling costs.

3 cl, 3 dwg