Diamond enhanced insert for rolling cutter bit

Details Diamond enhanced insert for rolling cutter bit Diamond enhanced insert for rolling cutter bit

1998-06-29

2000-08-22

Neuder, William

Boring or penetrating the earth

Bit or bit element

Specific or diverse material

175374, E21B 1046

Patent

active

061056944

ABSTRACT:
An earth-boring bit has a bit body and a cantilevered bearing shaft depending from the bit body. The cutter is mounted for rotation on the bearing shaft. Cutting elements are secured within holes formed in the cutter. At least some of the cutting elements include a body of hard metal which has a cylindrical base inserted in an interference fit within one of the holes. The body has a contact surface on its cutting end. A layer of super-hard material is bonded to the contact surface to provide a tip for the cutting end. The layer may be formed of a free-standing film of diamond which is brazed to the contact surface. It may also be formed with a high temperature, high pressure process directly onto the body of tungsten carbide.

REFERENCES:
patent: 4811801 (1989-03-01), Salesky et al.
patent: 4858707 (1989-08-01), Jones et al.
patent: 5158148 (1992-10-01), Keshavan
patent: 5282512 (1994-02-01), Besson et al.
patent: 5335738 (1994-08-01), Waldenstrom et al.
patent: 5337844 (1994-08-01), Tibbitts
patent: 5370195 (1994-12-01), Keshavan et al.
patent: 5469927 (1995-11-01), Griffin
patent: 5706906 (1998-01-01), Jurewicz et al.
patent: 5746280 (1998-05-01), Scott et al.

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