... )We produce a wide range of drilling tool including drill rod, wireline core barrel (AQ-PQ) and assemblies, synthetic diamond core ... , water swiel, wrench. 1. Drill rod: BQ, NQ , HQ, PQ2. Core barrel: BQ,NQ,NQ2,NQ3,HQ,HQ3,PQ , PQ3 head assembly and ... assemblies3. AQ,BQ,NQ,HQ,PQ, T2, T6 etc. Diamond core bit, reaming shell & shoe bit (syn. and surface-set ...