Combination shear and gouging cutting element and well construction tools made therewith

A well construction tool, comprising:

• a tool body;
• and
• a plurality of cutters attached to the tool body, at least one of the plurality of cutters comprising a cutting structure affixed to a substrate, the substrate made from metal carbide or steel covered with metal carbide, the cutting structure made from polycrystalline diamond, (PCD), diamond monolith, cubic boron nitride (CBN), diamond impregnated carbide, or diamond impregnated alloy, the cutting structure defining a monotonically decreasing diameter with respect to an axial distance from an interface between the cutting structure and the substrate, and a shear surface formed in the cutting structure, the shear surface intersecting a surface of the cutting structure between the interface and an apex of the cutting structure, the shear surface defining a smaller angle with respect to a centerline of the at least one cutter than the cutting structure proximate the interface, the shear surface defining a larger angle with respect to the centerline than the cutting structure proximate the apex, wherein the apex is rotationally symmetric about a centerline of the cutting structure in all rotational directions, and wherein a radius of curvature of the apex is at most 75 percent of a diameter of the substrate.