摘要
文章总结了以膨润土粘土矿物为主的地层钻进中的一套简单易行的施工技术,即用回转跟管法硬质合金钻进克服第四纪漂石层;用钢绳冲击钻进取出松软的粘土层岩心;用单管硬质合金钻进深部粘土矿层,因掌握了操作技术,取心率达90％以上.
A series of easily operation techniques for drilling in bentonite layers, mainly of clay minerals, ware summarized. Using hard alloy bit drilling with casing-rotating device could overcome the difficulty encountered during drilling in Quaternary gravel beds. Wire-line percussion drilling method can be used for coring in softclay beds. For deed clay bed drilling single tube core barrel hard alloy bit drilling may be employed. If these operating techniques were mastered the core recovery percent will be raised up to 90%.
出处
《地质与勘探》
CAS
CSCD
北大核心
1991年第6期60-62,共3页
Geology and Exploration
