US Patent 11802444 Drill bit having a weight on bit reducing effect

A bit for drilling a wellbore includes: a body; and a cutting face. The cutting face includes: an inner section and an outer section; a plurality of blades protruding from the body, and a row of superhard cutters mounted along each blade, the cutters in the inner section having a negative profile angle and the cutters in the outer section having a positive profile angle. At least one of: at least one inner cutter is oriented at a negative side rake angle to create a weight on bit (WOB) reducing effect, and at least one outer cutter is oriented at a positive side rake angle to create the WOB reducing effect. Each of the rest of the cutters are oriented at a side rake angle such that an overall effect of the side rake angles is the WOB reducing effect.