... possess high penetration than conventional diamond core bit from soft to medium-hard formations, ... 76, 96, 113, 123, 133 and 153mm outer diameters. PDC core bit : BQ, NQ, NQ3, HQ, HQ3, ... bit, reaming shell & shoe bit (syn. and surface-set, PDC)4.Drill tool: hoisting plug, water swivel, overshot, outer ... tube & inner tube wrench, foot clamp,etc. PDC bit for core and nocoring ...