在机井的钻探施工中,为了提高钻井效率,对于基岩的岩层,目前多采用岩心钻进的方法。此法有时会发生卡钻事故,即钻头被岩心卡住不能转动。对超过100米深处卡钻,若不及时处理,严重的会使钻孔报废,造成较大的损失。笔者在江苏省淮海农场及周边乡村的钻井实践中,对钻超过100米深的机井中出现卡钻事故采用定量TNT炸药定点引爆被卡住的钻头,换上新钻头,即可在短时间内继续施工,以局部较少的损 Drilling in the construction of wells, in order to improve drilling efficiency, rock bed for bedrock, the use of core drilling methods. This method sometimes occurs stuck card accident, that is, the drill bit is stuck can not rotate core. Drill more than 100 meters at the depth of the card, if not treated in time, serious will make the hole scrapped, resulting in greater losses. In the drilling practice of Huaihai Farm and the surrounding villages in Jiangsu Province, the author of the drill stuck more than 100 meters deep in the drill hole stuck with quantitative TNT explosions stuck fixed bit, put a new drill, you can in a short period of time Continue construction, less damage to the local