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tao guan de qi ba wen ti
Author(s): 
Pages: 16-17+45
Year: Issue:  10
Journal: Hydrogeology and Engineering Geology

Keyword:  小套管套管柱起拔套管膨胀岩下套管膨胀性岩层管子加固抗断强度千斤顶;
Abstract: <正> 套管事故的发生常与膨胀性岩层,如页岩、淤泥和粘土等对其挤压有关。对于岩层的膨胀我们是无法解决的。只能在下套管之前先以优质泥浆冲孔来局部地减小套管与孔壁间的摩擦力。用这种冲洗方法,可得到象润滑油般的一层薄层,此薄层在提取管子时会
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