This tool is ideal for the removal of dirties which may be left over the inside wall of casing , such as solid cement , hard wax , various salt crystals or deposits , perforation burrs , iron oxide residues resulted from rusting , so as to make all downhole tools pass through unblocked . Especially when a small circular clearance is available between the down-hole tools and casing inside diameter , the complete scrapping becomes more necessary before further working .

Technical parameters and specifications