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1. (WO2017058235) CUTTER BOUND TO MATRIX DRILL BITS VIA PARTIAL TRANSIENT LIQUID-PHASE BONDS

Pub. No.:    WO/2017/058235    International Application No.:    PCT/US2015/053625
Publication Date: Fri Apr 07 01:59:59 CEST 2017 International Filing Date: Sat Oct 03 01:59:59 CEST 2015
IPC: B22F 5/00
B22F 7/02
E21B 10/42
E21B 10/54
Applicants: HALLIBURTON ENERGY SERVICES, INC.
Inventors: COOK III, Grant O.
Title: CUTTER BOUND TO MATRIX DRILL BITS VIA PARTIAL TRANSIENT LIQUID-PHASE BONDS
Abstract:
Bonding polycrystalline diamond compact (PDC) cutters to metal matrix composite (MMC) drill bits may be achieved with a partial transient liquid-phase (PTLP) bonding method that uses lower temperatures than comparable brazing methods. For example, an interlayer bonding structure positioned between a PDC cutter and the MMC may be heated to and maintained at a bonding temperature for a period of time sufficient to isothermally solidify the outer layers with the refractory layer and to react the outer layers with the hard composite substrate and to the MMC.