CUTTING STRUCTURES FOR FIXED CUTTER DRILL BIT AND OTHER DOWNHOLE CUTTING TOOLS

摘要

A downhole cutting tool may include a tool body; a plurality of blades extending azimuthally from the tool body; and a plurality of cutting elements disposed on the plurality of blades, the plurality of cutting elements comprising: at least two non-planar cutting elements comprising a substrate and a diamond layer having a non-planar cutting end, wherein at least one of the at least two conical cutting elements has a positive back rake angle or positive side rake angle, and at least one of the at least two non-planar cutting elements has a negative back rake angle or a negative side rake angle.