There are 3 kinds of diamond core bits including PDC core bits, thermo-stable polycrystalline diamond core bits and natural diamond core bits. PDC core bits achieves good drilling stability and applicable to coring activities in soft to medium hard formations. Thermo-polycrystalline diamond core bits features good thermo-stability and applicable to medium hard and low abrasiveness formations. Natural diamond core bits have very good anti-abrasiveness and applicable to medium to hard abrasive formations.
