When the PDC diamond layer shedding occurs, the entire drill will be damaged

During drilling , the drill hole wall and the friction generated between large , uneven bottom of the hole and the residual friction rock flour and other comprehensive factors make the PDC bit additional force by uncertainty , seriously affect the use effect of the use of PDC life. Determine the effect of using PDC PDC diamond layer involves not only the strength , PDC large extent the impact resistance of  synthetic diamond  substrate by bonding strength between the direct effects . In use , when the PDC diamond layer shedding occurs , the entire drill will be damaged . Therefore, in order to improve the bonding strength of PDC interface , designed with a variety of interfaces , plane connection PDC PDC impact current methods of performance testing method and the heavy weights of the impact abrasive grinding  method , commonly used for the heavy weights of impact method . The business impact resistance test according to the production characteristics, the quality of the heavy Tuo , distances to the impact . This paper mainly uses tilting heavy impact energy analyzer Tuo France PDC impact toughness test , explore and study the impact of different interface structure on PDC performance, and through analysis of polycrystalline diamond layer fracture macroscopic morphology investigate the impact of PDC failure mechanism .