Ultra-hard material cutting elements, methods of forming the same and bits incorporating the same
AssigneeSmith International, Inc.
InventorFENG YU
Life of this patent
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Abstract
The present disclosure relates to cutting tools incorporating polycrystalline diamond bodies used for subterranean drilling applications, and more particularly, to a polycrystalline diamond body joined to a substrate by a fastening member to form a cutting element. The polycrystalline diamond body may be binderless polycrystalline diamond, non-metal catalyst polycrystalline diamond, leached polycrystalline diamond, carbonate polycrystalline diamond or polycrystalline cubic boron nitride. The polycrystalline diamond body includes an aperture and a fastening member extending through the aperture and metallurgically bonded to the substrate by a HPHT process.
Claims20
A cutting element, comprising:
- a polycrystalline diamond body having a working surface and an interface surface opposite the working surface;
- an aperture in the polycrystalline diamond body extending between the working surface and the interface surface;
- a substrate having an interface surface;
- a fastening element extending through the aperture in the polycrystalline diamond body;
- and
- a metallurgical bond between at least a portion of the fastening element and at least a portion of the substrate at an interface between the fastening element and the substrate.
A method of joining a thermally stable polycrystalline diamond body to a substrate with a fastening member, the method comprising:
- obtaining a thermally stable polycrystalline diamond body having an aperture, wherein the thermally stable polycrystalline diamond body is selected from the group of bodies consisting essentially of binderless polycrystalline diamond bodies, non-metal catalyst polycrystalline diamond bodies, leached polycrystalline diamond bodies, carbonate polycrystalline diamond, and polycrystalline cubic boron nitride;
- obtaining a substrate;
- inserting the fastening member into the aperture;
- and
- high pressure, high temperature sintering the fastening member, the thermally stable polycrystalline diamond body, and the substrate to form a metallurgical bond between the fastening member and the substrate.
Dependencies are inferred from the claim text.