CAJ | 학술논문

介绍了汶川地震断裂带科学钻探项目WFSD-4孔钻探施工概况及采用的关键技术，包括螺杆马达-液动锤-长半合管取心钻进技术、偏心扩孔取心技术、防冲蚀取心钻头技术、大斜度定向钻进技术、活动套管技术、新型钻井液体系和新型深孔取心钻机等。
개소료문천지진단렬대과학찬탐항목WFSD-4공찬탐시공개황급채용적관건기술，포괄라간마체-액동추-장반합관취심찬진기술、편심확공취심기술、방충식취심찬두기술、대사도정향찬진기술、활동투관기술、신형찬정액체계화신형심공취심찬궤등。
This paper introduces drilling operation of and some key technologies used in the borehole WFSD-4 of Wen-chuan Earthquake Fault Scientific Drilling Project.The main drilling technologies used in the drilling operation of WFSD-4 are positive displacement motor-hydraulic hammer-long split core barrel coring technology, eccentric reaming coring tech-nology, anti-erosion core bit technology, high angle directional drilling technology, retrievable casing technology, the new type of drilling fluid system and new type of drill rig for deep hole coring.