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我队第二分队某钻机在4月8号发生一次脱落钻头的孔内事故（厚壁钻粒钻头长为370毫米），处理过程中，由于操作不注意而连续造成两次事故加事故。一次是在扫钻头内岩心时，把一根1.5米长的50毫米钻杆掉入孔内，后来，在下50毫米的雌形矢锥捞钻杆时，又将矢锥上部异径接手丝扣部分断掉。这样一来，事故就比较严重，更加复杂，难于处理，先后采取很多方法处理都无效。这种严重的复杂事故如处理不当，就有报废钻孔的可能。在分队党支部具体领导下，召开了技术研究会，经过大家认真详细分析研究。决定采取孔内爆破法扩大孔径来处理，结果，仅用了2小时30分就恢复了生产。具体做法简介如下。
A driller in the second unit of our team suffered an accidental hole accident on April 8 (thickness drill bits 370 mm long). During the treatment, accidents and accidents were continuously caused by two accidents due to unattended operation. Once in the drilling bit core, a 1.5-meter-long 50 mm drill pipe fell into the hole, and later, in the next 50 mm fenestration fishing rod, and then the lower part of the cone of the cone took over the thread Part broken. As a result, the accident is more serious, more complex and difficult to deal with, and has taken many ways to deal with ineffectively. If this serious and complex accident is handled improperly, there is the possibility of scrapping holes. Under the specific leadership of the detachment’s party branch, a technical seminar was held and after careful analysis and study by everyone. Decided to take the hole blasting method to expand the aperture to deal with the result, in only 2 hours and 30 minutes to resume production. The specific practices are as follows.