... GREAT WALL DRILLING TOOLS CO.,LTD The Casing Scraper is used to clean cement, mud, embedded bullets, ... casing. Maintaining a dean casing I. D. u irnportant to the operation of all tooh used ... in drilling the well. likewke, packers and similar tools must have a clean surface to grip, Foreign materials on casing ... tools to become difficult to operation.The Casing Scraper is manufactured from a solid ...