... HQ Core Barrel, Casing Tube, Overshot Assembly,Hosti NQ HQ Core Barrel, Casing Tube, Overshot Assembly,Hosting Plug, Drill RodNQ HQ Core ... Barrel, Casing Tube, Overshot Assembly,Hosting Plug, Drill Rod Wireline drilling is the special method ... from the bottom of the hole without removing the rod string. When the driller wants to remove the core, an overshot ...