GREAT WALL DRILLING TOOLS CO.,LTD The Casing Scraper is used to clean cement, mud, embedded bullets, rust, mill ... walli of casing. Maintaining a dean casing I. D. u irnportant to the operation of all tooh used in drilling ... AE.run.minisite.productShow(); oProductShow.init( { 'aImgSrc': aBigImageSrc } ); } )(); casing scrapers( used to clean cement, mud, embedded bullets, rust, mill scale, paraffin ...