Polycrystalline Diamond Compact Drill

The composite  abrasive grinding  set shape is welded to a circular cylinder on the cutting tool, the cutting insert mounted on a drill bit body, a PDC bit. Than natural diamond drill bits PDC bits, low cost, but only for soft to medium hard formations. PDC bits in the early 1970s after the success of the manufacture and use, rapid  grinding wheel , it is at a  synthetic diamond  and a high speed drill, drill footage height, unit footage low cost. China Oilfield use some polycrystalline diamond composite sheet inserts welded on the blade, also received good results.