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近年来,我们由于推广针状合金钻进,火口径岩心钻探正逐步被小口径所代替.使用小口径针状合金钻进具有效率高、质量好、孔内事故少、管材消耗小等优点.但是,由于钻孔口径小,发生事故不能用常规反事故工具来处理.我队在推广小口径针状合金钻进的过程中,常见的事故是烧钻,其主要原因是水泵工作不良或钻具泄漏严重,使孔底冲洗液量不足;有时针状合金胎块被磨平,钻头底部过水受阻又未及时提钻也会引起烧钻.在处理这类事故的实践中,我们设计了
In recent years, due to the promotion of needle-shaped alloy drilling, core drilling of fire caliber is gradually being replaced by small caliber, and the use of small caliber needle alloy drilling has the advantages of high efficiency, good quality, less hole accidents and less pipe consumption. However, due to the small borehole diameter, accidents can not be handled by conventional anti-accident tools.During the promotion of small-diameter acicular alloy drilling, the common accident in our team is the burnt drill, which is mainly caused by poor working of the pump or drilling With a serious leak, so that the amount of liquid at the bottom of the hole is insufficient; sometimes the needle-shaped alloy blocks are polished flat, drill bit at the bottom of the water has been blocked and not promptly drill can cause burns .In dealing with such accidents in practice, we designed