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松软突出煤层本煤层瓦斯抽放孔钻进有3大技术瓶颈,一是成孔难,二是成孔率低,三是卡埋钻、喷孔等孔内事故多。针对这3个实际问题,通过对螺旋钻杆排粉机理、钻进技术分析,以及不同型式的非标准型宽翼片大通孔螺旋钻杆的现场应用,总结出适用于不同软煤层的非标螺旋钻杆钻进技术与配套装备,使其能够推广应用。
There are three major technical bottlenecks in the coal seam gas drainage holes drilled in the soft and outburst coal seam. One is the difficulty of forming holes, the other is the low porosity. The other is that there are many holes in the holes, such as burying holes and holes. In view of the three practical problems, through the field of application of spiral drill pipe powdering mechanism, drilling technology analysis and different types of non-standard wide-wing large-hole screw drillstring, it is concluded that non-standard Spiral drill drilling technology and ancillary equipment to enable its application.