Cutting element for drill bits

Details Cutting element for drill bits Cutting element for drill bits

1995-12-22

1997-05-20

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Specific or diverse material

51295, 175434, 761084, 408145, E21B 1058

Patent

active

056304790

ABSTRACT:
A cutting element which has a metal carbide stud having a conic tip formed with a reduced diameter hemispherical outer tip end portion of said metal carbide stud. A layer of polycrystalline material, resistant to corrosive and abrasive materials, is disposed over the outer end portion of the metal carbide stud to form a cap. An alternate conic form has a flat tip face. A chisel insert has a transecting edge and opposing flat faces. It is also covered with a PDC layer.

REFERENCES:
patent: 3599737 (1971-08-01), Fischer
patent: 4108260 (1978-08-01), Bozarth
patent: 4150728 (1979-04-01), Garner et al.
patent: 4694918 (1987-09-01), Hall

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