Asymmetric diamond impregnated drill bit

A drill bit comprising:

• a bit body, and
• a plurality of blades formed in the bit body at least in part from solid infiltrated matrix material,
• the blades having abrasive particles thereon, the blades being distributed around substantially the entire circumference of the bit body, the blades formed so that, with respect to an axis of rotation of the bit, the radius of curvature of one side of the bit differs from the radius of curvature of an opposite side of the bit so that the bit drills a larger diameter hole than a pass through diameter of the bit, at least some of the blades on the one side including abrasive particles therein, the blades on at least the opposite side comprise an axial length where the blades are formed to the respective one of the radii of at least 60 percent of the diameter of a hole drilled by the bit.

A drill bit comprising:

• a bit body, and
• a plurality of blades formed in the bit body at least in part from solid infiltrated matrix material,
• the blades having abrasive particles thereon, the blades being distributed around substantially the entire circumference of the bit body, the blades formed so that, with respect to an axis of rotation of the bit, one side of the bit is formed to a smaller radius than an opposite side of the bit so that the bit drills a larger diameter hole than a pass through diameter of the bit, at least some of the blades on the one side including abrasive particles therein, the blades the opposite side of the bit defining a contact angle of at least 140 degrees.