GREAT WALL DRILLING TOOLS CO.,LTD The Casing Scraper is used to clean cement, mud, embedded bullets, rust, mill ... on casing walls will frequently cause these tools to become difficult to operation.The Casing Scraper is manufactured from a ... oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); casing scrapers( used to clean cement, mud, embedded bullets, rust, mill scale, paraffin, perforation ...