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)

Patent

CA 2584928

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.

Un trépan de forage comprend un corps de trépan dans lequel sont montées une pluralité de structures de coupe avec pièces rapportées, dans lesquelles au moins une partie desdites structures de coupe comprennent du diamant - les structures insérées imprégnées ayant une exposition thermique totale de moins de 25 minutes au-dessus de 1 500 oF. Les diamants peuvent être d'origine naturelle ou synthétique. Le corps du trépan lui-même peut être imprégné de diamants, auquel cas il est préférable que les diamants dans les pièces rapportées représentent au moins 40 % du total des diamants dans le trépan.

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