We are greatwall drilling tools co., ltd based in Mudanjiang, China. We are member of TradeKey.com since March, 2011. Our business is related to Industrial Machinery industry and we specifically deal in Drill collar, Heavy Weight Drill Pipe, Kellys, Jars tools, Drill stem tools, Fishing tools, Accessory tools, Coring tools, Milling tools, Cementing tools, Wellhead. Please find our product details below: Thank you for taking time to go through our business profile. If there are any questions, inquiries or comments, please feel free to contact us. Casing scraper is ideal for the removal of dirties which may be left inside the wall of casing, such as solid cement, hard wax, various salt crystals or deposits and rusting to ensure that all downhole tools pass through unblocked. At present scrapping inside wall of casing with scraperhas become necessary in many leadingoilfields of China. Technical specification and parameter Type Max. O.D. of blade strech out (mm) Min. O.D. of blade strech out (mm) Connection Casing Size (in) GX114 106 95 NC26 4 1/2 GX127 118 105 NC26 5 GX140 130 117 NC31 5 1/2 GX168 158 141 3 1/2 REG 6 5/8 GX178 166 149 3 1/2 REG 7 GX245 230 212 4 1/2 REG 9 5/8