BLADE BIT WITH WEAR-RESISTANT CUTTING STRUCTURE (EMBODIMENTS) Russian patent published in 2019 - IPC E21B10/43 E21B10/55 

FIELD: mining.

SUBSTANCE: group of inventions relates to shear-chisel blade blades for drilling of rocks for oil and gas or other purposes. Blade bit with wear-resistant cutting structure includes housing with connecting thread, central channel and outlet holes protected by hard-alloy coating blades and a gaging part, a main cutting profile with a plurality of PDC cutters with a wedge-shaped cutting shape of the end face of the diamond layer. PDC cutters with thickness of diamond layer in range of 0.5 to 3 mm, leached surface in range of 0.01 to 1.5 mm and chamfer range from 0.05 to 2 mm are installed from central axis of bit to nominal diameter of bit. Axis of cylindrical part PDC of cutter forms with cutting direction angle in range from 20 to 90°, and the cutting process is carried out with a bevel, a cylindrical surface and a leached surface of the diamond layer of the PDC cutter.

EFFECT: technical result consists in increase in wear resistance and drilling speed.

5 cl, 12 dwg