对深孔大口径取心钻探工艺的一些认识——以WFSD-2号孔0～897.66m段施工为例  

Some Knowledge of Coring Drilling Technology in Large Diameter Deep Hole

作　　者：秦沛[1] 

机构地区：[1]北京市地质工程设计研究院,北京密云101500

出　　处：《探矿工程（岩土钻掘工程）》2011年第11期7-13,共7页Exploration Engineering:Rock & Soil Drilling and Tunneling

基　　金：科技部科技支撑计划专项"汶川地震断裂带科学钻探(WFSD)"项目之"科学钻探与科学测井"课题资助

摘　　要：深孔大口径取心钻探,钻孔口径大、地层复杂、钻孔结构复杂、深孔段效率低,钻进工艺尚不成熟,钻探工程难度较大。结合WFSD-2号孔0～897.66 m段施工情况,介绍了施工中存在的主要问题及采取的主要技术措施;对各种施工工艺、技术方法进行了对比分析,提出了建议。Drilling is difficult for coring in large diameter deep hole because of large diameter,complex formation and borehole structure with immature drilling technology.According to the construction of the section of 0～897.66m of hole WFSD-2,the paper introduced the main problems and technical measures in construction.Comparative analysis was made on different construction technologies and technical methods,and some suggestions were put forward to the similar project.

关 键 词：深孔 大口径 取心钻探 汶川地震断裂带 科学钻探 

分 类 号：P634.5[天文地球—地质矿产勘探]