FIELD: mining.
SUBSTANCE: drilling tool comprises a tool body, a plurality of blades extending from the tool body, and a plurality of non-planar cutting elements on each of the plurality of blades. A variety of non-planar cutting elements rotated in one plane forms a cutting profile. The cutting profile includes the cone area, the front region, the shoulder region and the caliber region. The plurality of non-planar cutting elements has a first shape in at least one of the region of the cone, the front region and the caliber region, and a second shape that differs from the first in at least the shoulder region. The first shape and second shape of the non-planar cutting elements provide a greater degree of protection from impact forces in the shoulder region than in the region of the cone and the front portion.
EFFECT: ensuring an effective penetration rate and an acceptable bit life.
24 cl, 15 dwg
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