... DRILLING TOOLS CO.,LTD The Casing Scraper is used to clean cement, mud, embedded bullets, rust, mill scale, ... . likewke, packers and similar tools must have a clean surface to grip, Foreign materials on casing walls will frequently ... oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); casing scrapers( used to clean cement, mud, embedded bullets, rust, mill scale, paraffin, perforation burrs ...