Product introduction : ? Polycrystalline diamond cutters are set on the crown giving a very long working life, very fast penetration and high percentage core recovery in soft to hard rock formations. The bit may be used with air, mud, or foam flushing. ? PDC bits are an alternative to T.C. Bits and Surface set diamond bits, when drilling in non-consolidated and medium hard rock formation. ? Character : 1. very long working life 2. very fast penetration 3. high percentage core recovery 4. used with air, mud, or foam flushing ? Specification : Wireline WL series: Geobor S, WLA, WLB, WLN, WLH, WLP, WLB3, WLN3, WLH3, WLP3, WLN2 T2: T2 46, T2 56, T2 66, T2 76, T2 86, T2 101 TT: TT 46, TT 56 T6: T6 76, T6 86, T6 101, T6 116, T6 131, T6 146 T6S: T6S 76, T6S 86, T6S 116, T6S 131, T6S 146 B: B46, B56, B66, B76, B86, B101, B116, B131, B146 MLC: NMLC, HMLC LTK: LTK48, LTK60 WF: HWF, PWF, SWF, UWF, ZWF WT:RWT, EWT, AWT, BWT, NWT, HWT(Single Tube, Double Tube) WG: EWG, AWG, BWG, NWG, HWG(Single Tube, Double Tube) WM: EWM, AWM, BWM, NWM Chinese standard: 56mm, 59mm, 75mm, 91mm, 110mm, 131mm ?