套管开窗侧钻技术在贵州地热钻井中的应用  

Application of Sidetracking in Casing in Guizhou Geothermal Drilling

作　　者：李奇龙 张承飞[3] 宋继伟[3] 李勇 王虎 朱斗圣[3] LI Qi-long;ZHANG Cheng-jei;SONG Ji-wei;LI Yong;WANG Hu;ZHU Dou-sheng：(111 Geological Brigade of Bureau of Geology and Mineral Exploration and Development Guizhou Province,Guiyang Guizhou 880008,China;Guizhou Geological Engineer ing Investigation Design and Research Institute,Guiyang Guizhou 550008,China;112 Geological Brigade of Bu- reau of Geology and Mineral Exploration and Development Guizhou Province,Anshun Guizhou 561000,China)

机构地区：[1]贵州省地质矿产勘查开发局111地质大队,贵州贵阳550008 [2]贵州地质工程勘察设计研究院,贵州贵阳550008 [3]贵州省地质矿产勘查开发局112地质大队,贵州安顺561000

出　　处：《探矿工程（岩土钻掘工程）》2018年第7期6-9,共4页Exploration Engineering:Rock & Soil Drilling and Tunneling

基　　金：贵州省社会发展科技攻关资助项目"贵州复杂地层深井钻探工艺应用研究"(编号:黔科合SY字[2015]3002);贵州省地矿局地质科研资金资助项目"双壁钻杆空气潜孔锤局部反循环钻井工艺在贵州地热深井中的应用研究"(编号:黔地矿科合[2017]01)

摘　　要：普安县江西坡地热井在钻进到井深907.91m时遇到了卡钻事故,解卡失败后,进行倒扣处理,剩余75.53m"落鱼"无法取出,"鱼头"位置井深832.38m。为绕开"鱼头"位置继续钻进,必须进行开窗侧钻。在已经下套管固井的情况下,选用了DXQ210/H型导斜器作为导斜工具,使用KCXZ216型铣锥作为磨铣开窗工具,进行了套管内侧钻开窗作业。在分析事故概况的基础上,介绍了导斜器的工作原理和套管内开窗侧钻的技术方案,总结了施工作业中的注意事项,最终侧钻成功并顺利钻进到2364.56m完钻。Sticking accident happened at the drilling depth of 907.91 min Jiangxipo geothermal well,back-off was used after releasing failed,the remainded 75.53 mdrilling tool could not be taken out and the top end of the drilling tool was at the depth of 832.38 m.It is necessary to adopt sidetracking to bypass the top end of the drilling tool for continue drilling.In the case of casing cementing completion,sidetracking window from inside casing was carried out with DXQ210/H type deflecting device selected as the deflecting tool and KCXZ216 type taper miller as milling tool.Based on the analysis on the general situation of the accident,the paper introduces the working principle of the deflecting device and the technical scheme of sidetracking window from inside the case and summarizes the attentions in the construction operation.The sidetracking is smoothly completed at the depth of 2364.56 m.

关 键 词：地热钻井 套管开窗 导斜器 铣锥 侧钻 

分 类 号：TE243.9[石油与天然气工程—油气井工程] TE249