Compound diamond cutter

Details Compound diamond cutter Compound diamond cutter

E - Fixed Constructions

21

B

E21B 10/52 (2006.01) E21B 10/56 (2006.01)

Patent

CA 2140828

A diamond drag bit is disclosed that utilizes stud type PDC cutters that have dome shaped polycrystalline diamond depth of penetration limiters fused to the tungsten carbide surface trailing the PDC compact disc. This cutter penetration limiting diamond dome surface acts as an impact or shock absorber to minimize the impact damage to the PDC cutter when drilling laminated hard and soft rock formations.

Cette invention concerne un trépan à lames diamantées portant des molettes à bâtonnets PDC qui présentent des limiteurs de pénétration en diamant polycristallin à forme en dôme fusionnés à la surface en carbure de tungstène suivant la pastille compacte PDC. Cette surface bombée diamantée de limitation de pénétration sert d'amortisseur de choc limtant l'avarie des molettes PDC à la traversée de formations dures et tendres alternées.

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