Brazing receptacle for improved PCD cutter retention

Details Brazing receptacle for improved PCD cutter retention Brazing receptacle for improved PCD cutter retention

1996-06-04

1998-04-14

Watts, Douglas D.

Metal tools and implements, making

Blank or process

Drill

295275, 295276, 76DIG12, 164 98, E21B 1046

Patent

active

057379807

ABSTRACT:
Thin walled metal alloy receptacles are filled with a filler material. If granular, the filler material is solidified in the receptacles. The receptacles are inserted in a bit mold with their open ends abutting against preformed cutter locations in the bit mold. The mold is filled with a steel or tungsten carbide powder and a binder and exposed to temperatures sufficient to cause the binder to infiltrate the steel or tungsten carbide as well as infiltrate the receptacle outer surfaces, metallurgically bonding the receptacles to the binder. The mold is then removed, revealing a bit body with the bonded filled receptacles. The filler material is removed from the receptacles PCD cutters are inserted in the receptacles and are brazed using conventional brazing techniques.

REFERENCES:
patent: 4499795 (1985-02-01), Radtke
patent: 4683781 (1987-08-01), Kar et al.
patent: 4694919 (1987-09-01), Barr
patent: 5119714 (1992-06-01), Scott et al.
patent: 5179994 (1993-01-01), Kuhn
patent: 5355750 (1994-10-01), Scott et al.

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