... Including impregnated diamond core bit, surface-set diamond bit, reaming shells, casing bit, casing shoe bit, corelifter, corelifter case, core barrel assembly, inner ... PQ/AQTK, BQTK, BQ3, NQ2, NQ3, NQTT, HQ3, HQTT, PQ3, PQTT T2 series: T2 46, T2 56, T2 ... impregnated diamond core bit 6mm & 12mm Casing & Casing shoe bit NQ2 & NQ3 double tube & triple tube core bit Surface-set diamond core bit LTK48 & ...