... specializing in the design and manufacture of premium diamond drilling tools for the world engineering: geotechnical exploration, Mining exploration, Oil ... drilling)We produce a wide range of drilling tool including drill rod, wireline core barrel (AQ-PQ) and assemblies, ... hoisting plug, water swiel, wrench. 1. Drill rod: BQ, NQ , HQ, PQ2. Core barrel: BQ,NQ,NQ2,NQ3,HQ,HQ3,PQ , PQ3 head assembly and ...