Patent ID: 9637979
Date: 2017-05-02
CPC Classifications: B33Y,E21B

Claim:
1. An earth-boring drill bit, comprising: a body comprising a longitudinal axis; blades extending from a remainder of the body, junk slots being defined between the blades, the blades extending radially from proximate the longitudinal axis to a gage region of the body, the blades extending longitudinally from a leading end of the body toward a trailing end of the body; a first abrasive-impregnated cutting structure extending along a rotationally leading surface of a first blade; and a second abrasive-impregnated cutting structure extending along a rotationally leading surface of a second, different blade; a third abrasive-impregnated cutting structure extending along a rotationally leading surface of a third, different blade; wherein a first wear resistance of the first abrasive-impregnated cutting structure at a first radial distance from the longitudinal axis is different from a second wear resistance of the second abrasive-impregnated cutting structure at a second, different radial distance from the longitudinal axis; and wherein a third wear resistance of the third abrasive-impregnated cutting structure at a third distance from the longitudinal axis is different from the first wear resistance and the second wear resistance at the first radial distance and the second radial distance.