POLYCRYSTALLINE DIAMOND CUTTING ELEMENT AND METHOD OF USING SAME

摘要

A polycrystalline diamond cutting (10) element of a drill bit (12) of a downhole drilling tool is provided. The PDC element having a sub strate (24), a diamond table (22) and at least one pattern (40a, b, c). The diamond table has an initial cutting edge (50) along a periphery thereof. The pattern integrally formed within the diamond table. The pattern(s) defining at least one discontinuity about the diamond table that, in operation, selectively breaks away upon impact to create new cutting edges in the diamond table whereby a sharp cutting edge is continuously exposed to a material being cut.