Drill bit having diamond impregnated inserts primary cutting...

Details Drill bit having diamond impregnated inserts primary cutting... Drill bit having diamond impregnated inserts primary cutting...

E - Fixed Constructions

21

B

E21B 10/46 (2006.01) B22F 7/06 (2006.01) E21B 10/42 (2006.01)

Patent

CA 2311020

An earth-boring bit comprises a bit body bit body in which are mounted a plurality of cutting structures inserts, wherein at least a portion of the cutting structures comprise diamond--impregnated inserts having a total thermal exposure of less than 25 minutes above 1500°F. The diamonds can be natural or synthetic diamond. The bit body itself may be diamond-impregnated, in which case it is preferred that the diamonds in the inserts make up at least 40% of the total diamond in the bit.

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