An experimental study of sliding friction between PDC drill cutters and rocks

Characterisation of thermally degraded polycrystalline diamond

“…Pin-on-disc experiments performed at high temperatures showed that cracking of the PCD microstructure only occurred at temperatures above 700°C, where graphitisation of the material could be a contributing factor [9]. To a lesser degree, other factors considered in the study of thermal degradation of PCD are oxidation of the diamond [13], oxidation of the cobalt [14,15], the macro-residual stress state between the diamond layer and the tungsten carbide backing [16], and chemical reactions between the rock/cooling fluids used during operations [17].…”

Studies on the formation of discontinuous rock fragments during cutting operation

“…Many experimental investigations have contributed to a better understanding for the rock-tool interaction, tool wear, and thermal behavior during cutting using a PDC (Polycrystalline Diamond Compact) cutting tool [1][2][3][4][5]. Since experiments are usually costly to run and it is difficult to directly observe the rock fragmentation removal process, numerical simulations have been performed to elucidate rock-tool interaction during rock cutting.…”