Introduction COMBO type casing scraper and NON CASING SCRAPER /NON CASING BURSH are used in conjunction, the annular scraper and the lower scraper can be internal and external expansion automatically according to the thickness of the casing wall dirt, to scrape dirt layer-by-layer. At the same time between scraper and spindle to turn to each other. The mandrel and the outer tube by using spline connection, can realize the torque transmission.