Nq3 Hq3 Pq3 Wire Line Triple Tube Core Barrels for Geology Geotechnical Investigation/Mining Exploration Wireline core drilling is a kind of don't need to lift the drill rod, direct gain rock cores drilling tool. It includes: core barrels assembly, overshot, drill rods, wireline winch, hoist plug, foot clamp, circular wrenches and other accessories. It has high drilling efficiency, high bit coring rate, long working life, low labor intensity. With the more deep drilling depth