Multiple diamond layer polycrystalline diamond composite cutters

Details Multiple diamond layer polycrystalline diamond composite cutters Multiple diamond layer polycrystalline diamond composite cutters

1995-08-22

1997-09-16

Neuder, William P.

Boring or penetrating the earth

Bit or bit element

Specific or diverse material

175434, E21B 1046

Patent

active

056670281

ABSTRACT:
An improved polycrystalline diamond composite ("PDC") cutter comprising a single or a plurality of secondary PDC cutting surfaces in addition to a primary PDC cutting surface, wherein at least two of the cutting surfaces are non-abutting, resulting in enhanced cutter efficiency and useful life. The primary PDC cutting surface is a PDC layer on one end face of the cutter. The secondary PDC cutting surfaces are formed by sintering and compacting polycrystalline diamond in grooves formed on the cutter body outer surface. The secondary cutting surfaces can have different shapes such as circles, triangles, rectangles, crosses, finger-like shapes, or rings.

REFERENCES:
patent: 4592433 (1986-06-01), Dennis
patent: 4823892 (1989-04-01), Fuller
patent: 5031484 (1991-07-01), Packer
patent: 5238074 (1993-08-01), Tibbitts et al.
patent: 5499688 (1996-03-01), Dennis

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