Improved earth-boring bits

Details Improved earth-boring bits Improved earth-boring bits

E - Fixed Constructions

21

B

E21B 10/08 (2006.01) E21B 10/46 (2006.01) E21B 10/52 (2006.01)

Patent

CA 2260459

Improved formulations of tungsten carbide have been disclosed. The improved tungsten carbide formulations typically include large tungsten carbide (WC) grains in a lower cobalt content binder matrix. The improved formulations are suitable for gage inserts and inner row insert in rock bits and earthen cutters. Drill bits incorporating these tungsten carbide inserts have better performance and longer lifetime because the improved tungsten carbide formulations result in reduced thermal fatigue and still maintain required toughness and wear resistance.

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