Our drill rods are all manufactured by CNC machines ... drilling)We produce a wide range of drilling tool including drill rod, wireline core barrel (AQ-PQ) and assemblies, ... plug, water swiel, wrench. 1. Drill rod: BQ, NQ , HQ, PQ2. Core barrel: BQ,NQ,NQ2,NQ3,HQ,HQ3,PQ , PQ3 head assembly and ... ,NQ,HQ,PQ, T2, T6 etc. Diamond core bit, reaming shell & shoe bit (syn. and surface-set, PDC)4. Drill tool ...