... Barrel, Casing Tube, Overshot Assembly,Hosting Plug, Drill RodNQ HQ Core Barrel, Casing Tube, Overshot Assembly ... Barrel, Casing Tube, Overshot Assembly,Hosting Plug, Drill Rod Wireline drilling is the special method of removing ... wants to remove core from a conventional core drill, the entire core barrel has to be ... the bottom of the hole without removing the rod string. When the driller wants to remove ...