An advanced series of polycrystalline-dia-mond compact (PDC) drill bits incorporating a new highly abrasion-resistant PDC cutter has extended effective PDC-bit application to hard-rock drilling.In offset comparisons,the advanced series of PDC bits fitted with the new cutters delivered significant increases in footage drilled and rate of penetration (ROP).The bit design is globally balanced to optimize axial,lateral,and torsional forces and can be modified by adjusting features such as profile shape,cutter rake angles,impact arrestors,and cutter type to optimize bit performance when drilling in hard and transitional environments.
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