Scraper 7 : Any device (as a lien scraper, paraffin scraper, etc.) that is used to remove deposits (as scale or paraffin) from tubing, casing, rods, or flow lines. (WLOP)
The Mudblogger (Oilfield, Energy and Related Photographs), Oil Field Glossary, TX, USA 2014. http://mudblogger.com/oilfield-glossary/, (Oil - Amer) {777}