PDC cutter element having improved substrate configuration
AssigneeSmith International, Inc.
InventorsGraham Mensa-Wilmot, Carl W. Keith, Tommy G. Ray
Life of this patent
Estimating the term…
Abstract
A supporting substrate for supporting a diamond layer on a cutting element is disclosed which has an irregular surface defining the interface between the substrate and the diamond layer. The irregularities in the surface comprise closed loops that may vary in amplitude, frequency or both. The irregularities may comprise ridges or grooves or a combination of ridges and grooves.
Claims22
A compact for use on a cutting element for an earth boring bit, comprising:
- a substrate having a supporting surface;
- and
- a superhard layer bonded to said supporting surface;
- wherein said supporting surface includes a surface feature, said surface feature defining at least two closed loops centered at the center of said supporting surface and having differing amplitudes.
A compact for use on a cutting element for an earth boring bit, comprising:
- a substrate having a supporting surface;
- and
- an abrasive layer bonded to said supporting surface;
- wherein said supporting surface includes a plurality of ridges, said ridges defining a plurality of nested closed loops having varying amplitudes.
A compact for use on a cutting element for an earth boring bit, comprising:
- a substrate having a supporting surface;
- and
- an abrasive layer bonded to said supporting surface;
- wherein said supporting surface includes a plurality of grooves defining a plurality of closed loops having different amplitudes and centered on said supporting surface.
A cutting element for an earth boring bit, comprising:
- a stud having first and second ends, said first end being adapted for attachment to a bit;
- a substrate having first and second substantially opposed surfaces, said first surface affixed to said second stud end;
- and
- an abrasive cutting layer affixed to said second substrate surface;
- wherein said second substrate surface includes a plurality of undulations having varying amplitudes, at least one of said undulations defining a closed loop, said closed loop being centered on said second substrate surface.
Dependencies are inferred from the claim text.