【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。更多还原

【Abstract】 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.更多还原