在反鑽具处理孔內事故中,因沒有特殊工具而常採用鍊条鉗、自由鉗、牙鉗等工具,由于这些工具不牢固,致在所反鑽具絲扣較紧的情況下容易損坏,使反鑽具时間延长甚至达不到应有目的。为此我們採用了一种反鑽桿工具,取得了良好效果。以一根直徑50～65公厘的圓鋼(为节約材料,我們採用的是KAM—500型鑽机廢橫軸制造的),鉋 In the drill hole handling accidents, because of the absence of special tools and often use chain pliers, free pliers, dental forceps and other tools, due to these tools is not strong, caused by the anti-drill threading tighter circumstances easily damaged Bad, so that anti-drill time to extend or even reach its due. To this end, we have adopted a reverse drill tool, and achieved good results. To a diameter of 50 to 65 mm round bar (to save material, we use the KAM-500-type drilling rig horizontal axis of waste), planing