[中   文] 一、用途清除套管內壁上的水泥塊、水泥環、硬臘、鹽垢、射孔毛刺及各種結晶物、沉淀物。保證井眼清凈、完整及其他井下作業正常進行。二、特點1、刀板的徑向力大，刮削性能好。2、鉆具只要上下移動，刀板可自行轉動刮削器。無卸扣扭矩。 3、工具下端借口可接鉆頭，實現鉆刮一次完成。4、刮削面積大，重復刮削率高。

[English ] I. Use Clean up cement mass, cement ring, hard wax, salt dirt, gun- perforation burr and various crystals and settling on inner wall of casing. Guarantee well hole clean, complete, and that other operations in well are carried out normally. II. Characteristics 1. Radial force of knife-board is large and its scraping performance is good. 2. As long as drilling tool moves upwards and downwards, the knife-board can rotates to scrap the casing. Without screw thread-unscrewing torsion. 3. Drilling bit can be connected to the lower end of tool, so drilling and scraping to be completed once-for-the-all can be realized. 4. Scraping area is large, and ratio of repeated scraping is high