... Assembly,Hosting Plug, Drill Rod,NQ HQ Core Barrel, Casing Tube, NQ HQ Core Barrel, Casing Tube, Overshot Assembly,Hosting Plug, Drill RodNQ HQ ... wireline. The overshot attaches to the back of the core barrel inner tube and the wireline is pulled back and the inner ... , SWF, UWF, 412F We also supply NMLC, HMLC Core Barrel.Double Tube & Single Tube Core Barrel: NWG, HWGWe will feel happy to give you ...