Polycrystalline diamond bodies having annular regions with differing characteristics
AssigneeDiamond Innovations, Inc.
InventorsAndrew Gledhill, Christopher Long, Alexanne Johnson
Life of this patent
Estimating the term…
Abstract
Polycrystalline diamond bodies having an annular region of diamond grains and a core region of diamond grains and methods of making the same are disclosed. In one embodiment, a polycrystalline diamond body (120) includes an annular region (142) of inter-bonded diamond grains having a first characteristic property and a core region (140) of inter-bonded diamond grains bonded to the annular region and having a second characteristic property that differs from the first characteristic property. The annular region decreases in thickness from a perimeter surface of the polycrystalline diamond body towards a centerline axis.
Claims13
A polycrystalline diamond body, comprising:
- a working surface, an interface surface, and a perimeter surface;
- an annular region of inter-bonded diamond grains that extends away from at least a portion of the working surface and at least a portion of the perimeter surface, wherein the annular region comprises diamond grains having a first catalyst material concentration;
- and
- a core region of inter-bonded diamond grains bonded to the annular region and that extends away from the interface surface, and at least a portion of the core region is positioned radially inward from the annular region,
- wherein the core region comprises diamond grains having a second catalyst material concentration that differs from the first catalyst material concentration,
- wherein the annular region decreases in thickness from the perimeter surface towards a centerline axis of the polycrystalline diamond body.
A polycrystalline diamond body, comprising:
- a working surface, an interface surface, and a perimeter surface;
- an annular region of inter-bonded diamond grains that extends away from at least a portion of the working surface and at least a portion of the perimeter surface, wherein the annular region comprises diamond grains having a first coefficient of thermal expansion;
- and
- a core region of inter-bonded diamond grains bonded to the annular region and that extends away from the interface surface, and at least a portion of the core region is positioned radially inward from the annular region,
- wherein the core region comprises diamond grains having a second coefficient of thermal expansion that differs from the first coefficient of thermal expansion,
- wherein the annular region decreases in thickness from the perimeter surface towards a centerline axis of the polycrystalline diamond body.
An earth-boring tool, comprising:
- a bit body;
- and
- a polycrystalline diamond compact secured to the bit body, the polycrystalline diamond compact comprising:
- a working surface, an interface surface, and a perimeter surface;
- an annular region of inter-bonded diamond grains that extends away from at least a portion of the working surface and at least a portion of the perimeter surface, wherein the annular region comprises diamond grains having a first catalyst material concentration;
- and
- a core region of inter-bonded diamond grains bonded to the annular region and that extends away from the interface surface, and at least a portion of the core region is positioned radially inward from the annular region,
- wherein the core region comprises diamond grains having a second catalyst material concentration that differs from the first catalyst material concentration,
- wherein the annular region decreases in thickness from the perimeter surface towards a centerline axis of the polycrystalline diamond body.
Dependencies are inferred from the claim text.