Cutting element for drill bits

Details Cutting element for drill bits Cutting element for drill bits

1994-10-17

1996-08-13

Novosad, Stephen J.

Boring or penetrating the earth

Bit or bit element

Specific or diverse material

175426, 51307, 761082, 408145, E21B 1056

Patent

active

055447139

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: 4108260 (1978-08-01), Bozarth
patent: 4109737 (1978-08-01), Bovenkerk
patent: 4150728 (1979-04-01), Garner et al.
patent: 4176725 (1979-12-01), Shields
patent: 4660659 (1987-04-01), Short, Jr. et al.
patent: 4694918 (1987-09-01), Hall
patent: 4722405 (1988-02-01), Langford, Jr.
patent: 4784023 (1988-11-01), Dennis
patent: 4811801 (1989-03-01), Salesky et al.
patent: 5011515 (1991-04-01), Frushour
patent: 5379854 (1995-01-01), Dennis

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