摘要
砂卵石层是钻进取心困难的地层。文中介绍了两个工程使用单动双管厚壁金则石钻头钻进SM植物胶护壁取心的实践，获得质量好、工艺简便、孔内事故少的良好效果．
The sand-cobble is often considered as a difficult sampling layer. In this article,the drilling and coring by using the single acting and double tube thick wall diamond bit in the borebole wall guarded by SM vegetable glue for two engineering projects are introduced. The satisfactory effect of high quality cor ing,simple technology and less borehole accident being achieved.
出处
《勘察科学技术》
1997年第2期40-42,共3页
Site Investigation Science and Technology
