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几年来，绳索取心钻进较完整的地层，充分显示了钻探效率高、纯钻时间长，劳动强度小、成本低等优点，但在破碎岩层中，绳索取心钻进遇到了很大的困难：孔壁稳定性差，坍塌掉块止不住，冲洗液漏失量很大等。针对这些问题，我们曾采用优质膨润土，用聚丙烯酰胺做处理剂，配制不分散低固相泥浆，这种泥浆，在护孔堵漏方面虽有一定效果，但孔内复杂情况还是屡屡出现。
In recent years, the ropes coring into more complete formations have fully demonstrated the advantages of high drilling efficiency, long time of pure drilling, low labor intensity and low cost. However, in broken rock formations, the coring of the ropes encountered a great deal Difficulties: Hole wall stability is poor, collapsed blocks can not stop, a large amount of fluid loss and so on. In response to these problems, we have used high-quality bentonite, polyacrylamide as a treatment agent, the preparation of non-dispersed low-solid mud, this mud, plugging in the hole has a certain effect, but the complicated situation within the hole or more often.