Q series Wire-line Double Tube Barrel Core barrelCore Barrels include single tube type,Website: , double tube type and triple tube type. BMLC, NMLC, HMLC triple tube core barrels are generally used for geological purpose, designed to maximize core recovery in soft formations. Available diameter sizes from 35-146mm. SIZE: Wireline series: Geobor S, WLA, WLB, WLN, WLH, WLP, WLB3, WLN3, WLH3, WLP3, WLN2, AQ, BQ, NQ, HQ, PQ, SQ, PQ3, HQ3, NQ3, BQ3, NQ2, WL-56, WL-66, WL-76 T2 series: T2 46, T2 56, T2 66, T2 76, T2 86, T2 101 TT series: TT 46, TT 56 T6 series: T6 76, T6 86, T6 101, T6 116, T6 131, T6 146 T6S series: T6S 76, T6S 86, T6S 116, T6S 131, T6S 146 B series: B46, B56, B66, B76, B86, B101, B116, B131, B146 MLC series: NMLC, HMLC LTK series: LTK48, LTK60 WF series: HWF, PWF, SWF, UWF, ZWF WT series: RWT, EWT, AWT, BWT, NWT, HWT(Single Tube, Double Tube) WG series: EWG, AWG, BWG, NWG, HWG(Single Tube, Double Tube) WM series: EWM, AWM, BWM, NWM, HWM Other sizes: AX, BX, NX, HX, TBW, NQTT, HQTT, TNW, 412F, BTW, TBW Chinese standard:  56mm, 59mm, 75mm, 89mm, 91mm, 108mm, 110mm, 127mm, 131mm, 150mm, 170mm, 219mm, 275mm Russian standard: 59, 76, 93, 112, 132, 152 mm    Double tube surface Size(surface exploration drilMetric system(mm)Imperial system(in)Hole diameterCore diameterHole diameterCore diameterBQ6036.42.361.43NQ75.747.62.981.88HQ96.163.53.782.5PQ122.7854.833.34Triple tube surface NQ375.7452.981.78HQ396.161.13.782.41PQ3122.7834.833.27