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多年来，一直用的角钢四脚钻塔，主要存在的问题就是过于笨重（每台4～7吨），对于在山地搬迁是一个沉重的负担。同时，这种钻塔在按装过程中显得复杂费事，特别是整体按装还受到地形的限制。为了克服这个矛盾，我们从1969年起，在队革委会的领导下，认真总结了自己的经验，结合北京型钻机的特点，并吸收了兄弟单位的先进技术，试制一种配合北京型钻机的桁架式钻
Over the years, the four-prong angle steel rig that has been used for a long time has the problem of overloading (4 to 7 tons each) and is a heavy burden for relocation in the mountains. At the same time, this drilling rig in the installation process is complicated and costly, in particular, the overall installation by terrain constraints. In order to overcome this contradiction, from 1969 onwards, under the leadership of the CYL committee, we conscientiously summed up our experience, combined with the characteristics of Beijing-based drilling rigs and absorbed the advanced technology of our brother units, Truss Drill