摘要
相山地区如意亭深钻CUSD4孔是中核集团龙灿工程下属子课题《相山基础地质研究》项目的第三个钻孔,设计孔深1600m。该钻孔于2016年8月12日开钻,至2016年12月6日,达到地质目的层位,终孔深度1435. 58m,平均台月效率406. 27m/台月。采用液动冲击器+P口径绳索取心钻具+锯齿型金刚石钻头组合钻进方法,在施工中取得良好使用效果,与同地区普通绳索取心钻进相比,钻进时效提高30%以上,钻头使用寿命提高20%以上。全孔岩心采取率98. 10%,破碎带岩心采取率达到99%。本文主要介绍了如意亭深钻CUSD4孔的施工工艺,可为类似地层钻孔提供借鉴。
The Ruyiting deep drilling hole CUSD4 in the Xiangshan area of Jiangxi Province is the third borehole of the sub-project of Longcan project of China National Nuclear Corporation( CNNC),"Xiangshan Basic Geological Research",with a designed depth 1600 m. It was started on 12 thAugust2016,reaching a final depth of 1435. 58 m,the geological target horizon on 6 thDecember 2016,implying an average drilling efficiency of 406. 27 meters per month. In this project,a combined drilling method was used,containing the P size( 122 mm in diameter) core drilling tool and saw-type diamond bit with the hydraulic impactor. This combined drilling method worked well during drilling process. As a result,the drilling efficiency increased by more than30%,service life of the bit increased by more than 20%,and the core recovery rate was 99% in broken formations. This paper presents the drilling technology implemented at the CUSD4 bore hole,which can provide some reference for drilling in similar strata.
作者
马智跃
李生海
段志强
李博
朱江龙
MA Zhiyue;LI Shenghai;DUAN Zhiqiang;LI Bo;ZHU Jianglong(Beijing China Nuclear Dadi Mineral Exploration Development Co.,Ltd,Beijing 100013;Research Institute No. 270,CNNC,Nanchang,Jiangxi 330200;CNNC Beijing Research Institute of Uranium Geology,Beijing 100029;China Geological Equipment Research Institute,Beijing 100120)
出处
《地质与勘探》
CAS
CSCD
北大核心
2019年第2期614-621,共8页
Geology and Exploration
基金
中核集团龙灿工程"相山基础地质研究"(编号:LCD116)资助
