E - Fixed Constructions – 21 – B
Patent
E - Fixed Constructions
21
B
76/21, 255/69
E21B 10/08 (2006.01) B22F 7/06 (2006.01) E21B 10/22 (2006.01) E21B 10/52 (2006.01)
Patent
CA 1231938
ROCK BIT CUTTER CONES HAVING METALLURGICALLY BONDED CUTTER INSERTS ABSTRACT OF THE DISCLOSURE A rock bit cutter cone for a drill bit is disclosed wherein hard carbide cutter inserts are metallurgically bonded into an interior core of the cone through a cladding. The cladding is bonded onto the exterior surface of the core by a powder metallurgy process. The cladding retains the inserts in the core. A thin layer or coating of a suitable metal, preferably nickel, is provided on the carbide insert prior to mounting into the core. The coating prevents degradation of the carbide through loss of carbon into the core during the powder metallurgy process and accomodates mismatch of thermal expansion between the cutter insert and the core. The interior of the cone is formed to provide bearing surfaces either by conventional techniques, or by powder metallurgy processes. Bearing surfaces formed in the interior of the core by powder metallurgy processes may be hard so as to permit an open bearing structure for the drill bit.
466146
Ecer Gunes M.
Salesky William J.
Gowling Lafleur Henderson Llp
Smith International Inc.
LandOfFree
Rock bit cutter cones having metallurgically bonded cutter... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Rock bit cutter cones having metallurgically bonded cutter..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rock bit cutter cones having metallurgically bonded cutter... will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1206985