Patent ID: 9051795
Filing Date: 2015-06-09
Classification: E21B

Abstract:
1. A downhole cutting tool, comprising: a tool body; a plurality of blades extending from the tool body; a first blade comprising at least one pointed cutting element disposed along a leading edge of the first blade, the at least one pointed cutting element comprising a first polycrystalline diamond material on a first carbide substrate, the first polycrystalline diamond material extending away from the first carbide substrate to terminate in a substantially pointed geometry opposite the first carbide substrate; and a second blade comprising at least one shear cutting element disposed along a leading edge of the second blade, the at least one shear cutting element comprising a second polycrystalline diamond material on a second carbide substrate, the second polycrystalline diamond material forming a planar cutting surface opposite the substrate; wherein, when the first blade and the second blade are superimposed on each other, a central axis of the at least one pointed cutting element is offset from a central axis of the at least one shear cutting element.