Cutting Element with Low Metal Concentration
OwnerDavid R. Hall, Ronald B. Crockett +3inventors
InventorsDavid R. Hall, Ronald B. Crockett, Marcus Skeem, Francis Leany, Casey Webb
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Abstract
In one aspect of the present invention, a downhole fixed bladed bit comprises a working surface comprising a plurality of blades converging at a center of the working surface and diverging towards a gauge of the bit, at least on blade comprising a cutting element comprising a superhard material bonded to a cemented metal carbide substrate at a non-planer interface, the cutting element being positioned at a positive rake angle, and the superhard material comprising a substantially conical geometry with an apex comprising a curvature.
Claims17
A cutting element, comprising:
- a carbide substrate bonded to body of sintered polycrystalline diamond at a non-planar interface that intersects a central axis of the cutting element;
- the diamond comprising a tapered side face leading to an apex along the central axis;
- the apex comprises a curvature starting at a transition from side face to the curvature;
- a volume defined by the apex comprises less than 5 percent metal concentration by volume;
- and
- 95 percent of interstices in the volume comprises some metal.
Dependencies are inferred from the claim text.