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山西临汾水文队所施工的钻孔中含水层多而且厚，平均十米就要出现一个含水层，总厚度占钻孔深度的60—70％。从岩层情况来看都是一些毫无胶结的流砂，坍塌非常严重，钻具提上来后，所钻的孔马上就会被泥砂填实。为保证水文钻孔的质量，又不能用泥浆钻进，给钻进工作带来很大的影响；套管下不去，套管挤夹，无法加长钻杆扫孔或钻进……。某些钻孔以致发展到无法钻进
Drilling in Linfen Hydrological Team in Shanxi Province is more and more thick in aquifers, and an aquifer should appear on the average of 10 meters. The total thickness accounts for 60-70% of the drilling depth. From the point of view of rock formations, there are some non-cement flow sands which collapse very seriously. After the drilling tools are put on, the drilled holes are immediately filled with silt. In order to ensure the quality of hydrological drilling, drilling can not be used to mud, drilling work to bring a great impact; not go under the casing, casing pinch clamp, drill pipe can not lengthen the drilling or drilling ... .... Some holes drilled so hard to drill