| CPC E21B 10/5673 (2013.01) | 16 Claims |
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14. A method of manufacturing an earth-boring downhole tool, comprising:
forming a drill bit body;
forming at least one blade extending from one end of the drill bit body, the at least one blade comprising a leading-edge section; and
forming at least one cutting element in each at least one blade proximate the leading-edge section of the at least one blade;
wherein forming the at least one cutting element comprises:
forming a polycrystalline diamond material;
affixing a first end of the polycrystalline diamond material at an interface to a substrate; and
shaping a second end of the polycrystalline diamond material;
wherein shaping the second end of the polycrystalline diamond material comprises:
forming at least four cutting edges defining a planar raised cutting surface;
forming a rectangular planar surface in a central region of the polycrystalline diamond material, the rectangular planar surface recessed relative to the planar raised cutting surface, the rectangular planar surface being surrounded by the planar raised cutting surface, the rectangular planar surface comprising four inner corners and four outer corners; and
forming at least one transition surface between at least two of the at least four cutting edges defining the planar raised cutting surface and a longitudinal side surface of the cutting element;
wherein the at least four cutting edges are formed on the four outer corners of the planar raised cutting surface; and
wherein the at least four cutting edges defining the planar raised cutting surface have a rectangular shape.
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