Coal Geology & Exploration


Based on the urgent need of accurate exploration of geological anomalous bodies such as collapse columns and small faults in underground coal mines for near-horizontal boreholes coring drilling of leakage formation, the double-wall hydraulic reverse circulation continuous coring technology was proposed, its technical principle and characteristics were analyzed, the matching ø89/42 mm double-wall coring drilling pipes and reverse circulation coring bits were developed. Three near-horizontal coring boreholes were drilled, the functional tests were carried out in a surface mine, the maximum core recovery rate of a single borehole was 83.6%, the maximum roundtrip footage was 69 m and the average drilling efficiency can be up to 3.61-6.26 m/h. The relevant improvement and optimization schemes of double-wall coring tool were put forward to solve the problem of serious flushing fluid leakage in leakage formation, and subsequent tests have shown that the return water flow and flow rate of the core return channel were greatly improved with adopting optimized coring tools. Finally, the problems of borehole annulus slagging and core blocked in the reverse circulation core construction was pointed out and the corresponding solutions were put forward, including using the method of positive and reverse circulation deslagging to solve the problem of hole annulus deslagging and using the method of hydraulic releasing stuck in the center channel to solve the problem of core stuck. The test shows that the double-wall coring drilling tool can meet the operation requirements of underground geological anomalous bodies exploration and provides a new technical approach for underground geological anomalous bodies exploration.


leakage formation, hydraulic reverse circulation coring, near-horizontal borehole, core blockage, solutions




[1] 施山山,闫家,李宽,等.破碎地层取心钻具研究现状及展望[J].探矿工程(岩土钻掘工程),2020,47(7):56-61. SHI Shanshan,YAN Jia,LI Kuan,et al.Research status and prospects of coring tools for broken formation[J]. Exploration Engineering(Rock & Soil Drilling and Tunneling),2020,47(7):56-61.

[2] 尹国明,郎猛,陈志鹏,等. 复杂地层用绳索取心钻具的研制[J].探矿工程(岩土钻掘工程),2020,47(2):63-67. YIN Guoming,LANG Meng,CHEN Zhipeng,et al. Development of wire-line drilling tools for complex formation[J]. Exploration Engineering(Rock & Soil Drilling and Tunneling),2020,47(2):63-67.

[3] 杨昌杰,张绍和,苏宏岸,等. 适用于破碎地层的新型单动双管钻具[J]. 煤田地质与勘探,2014,42(1):87-89. YANG Changjie,ZHANG Shaohe,SU Hong'an,et al. The application test of the new double-barreled and single-acting coring tool in fractured formation[J]. Coal Geology & Exploration,2014,42(1):87-89.

[4] 杨相茂,彭汉华,许华松. 破碎带取心钻进技术[J].探矿工程(岩土钻掘工程),2014,41(3):33-35. YANG Xiangmao,PENG Hanhua,XU Huasong. Coring drilling technology in fracture zone[J]. Exploration Engineering(Rock & Soil Drilling and Tunneling),2014,41(3):33-35.

[5] 周云,张绍和. 浅孔复杂地层ø110型绳索取心钻具的研制与应用[J]. 煤田地质与勘探,2017,45(4):163-169. ZHOU Yun,ZHANG Shaohe. Research and application of wire-line coring drilling tools for shallow hole in heterogeneous layers[J]. Coal Geology & Exploration,2017,45(4):163-169.

[6] 王稳石,朱永宜,贾军,等.汶川地震断裂带科学钻探项目取心钻进技术[J].探矿工程(岩土钻掘工程),2012,39(9):28-31. WANG Wenshi,ZHU Yongyi,JIA Jun,et al.Coring drilling technology in Wenchuan Earthquake Fault Scientific Drilling Project[J]. Exploration Engineering(Rock & Soil Drilling and Tunneling),2012,39(9):28-31.

[7] 韩毅,张绍和,白锐,等. 囊袋多节捆绑式绳索取心钻具的设计与应用[J]. 煤田地质与勘探,2019,47(5):220-224. HAN Yi,ZHANG Shaohe,BAI Rui,et al. Design and application of multi-section bundled bag wire-line coring drilling tools[J]. Coal Geology & Exploration,2019,47(5):220-224.

[8] 廖远苏,胡啟锋,缪赛,等. 发夹式复杂地层取心钻具的研制成果报告[R]. 赣州:江西有色地质勘查二队,2019. LIAO Yuansu,HU Qifeng,MIAO Sai,et al. A report on the development of hairpin core drilling tools in complex formations[R]. Ganzhou:No.2 Servey Team of Jiangxi Nonferrous Metal Geological Exploration Bureau,2019.

[9] 江西有色地质勘查二队. 复杂地层双隔自锁式三层管绳索取心钻具:CN 111636838 A[P]. 2020-09-08. No.2 Servey Team of Jiangxi Nonferrous Metal Geological Exploration Bureau. Double-partition self-locking three-layer pipe rope coring tool for complex stratum:CN 111636838 A[P]. 2020-09-08.

[10] 郭永成,赖志刚,刘伟,等. 机械制图[M]. 南京:南京大学出版社,2011. GUO Yongcheng,LAI Zhigang,LIU Wei,et al. Mechanical drawing[M]. Nanjing:Nanjing University Press,2011.

[11] 濮良贵,陈国定,吴立言,等. 机械设计[M]. 北京:高等教育出版社,2013. PU Lianggui,CHEN Guoding,WU Liyan,et al. Mechanical design[M]. Beijing:Higer Education Press,2013.

[12] 王达,何远信. 地质钻探手册[M]. 长沙:中南大学出版社,2014. WANG Da,HE Yuanxin. Geological drilling handbook[M]. Changsha:Central South University Press,2014.

[13] 线恒林. 在卡簧内装入引心导管的取心方法[J]. 探矿工程(岩土钻掘工程),1988(6):39-40. XIAN Henglin. A coring method for inserting a guide pipe into a circlip[J]. Exploration Engineering(Rock & Soil Drilling and Tunneling),1988(6):39-40.

[14] 李鑫淼,刘秀美,尹浩,等. 深孔复杂地层绳索取心钻具优化设计思路[J]. 探矿工程(岩土钻掘工程),2017,44(11):56-59. LI Xinmiao,LIU Xiumei,YIN Hao,et al. Optimum design thoughts of wire-line coring tool used for deep hole drilling in complex formation[J]. Exploration Engineering(Rock & Soil Drilling and Tunneling),2017,44(11):56-59.

[15] 李鑫淼,李宽,梁健,等. 复杂地层取心钻进堵心原因分析及其预防措施[J].探矿工程(岩土钻掘工程),2018,45(12):12-15. LI Xinmiao,LI Kuan,LIANG Jian,et al. Core jamming causes and prevention in drilling difficult formation[J]. Exploration Engineering(Rock & Soil Drilling and Tunneling),2018,45(12):12-15.

[16] 张伟.科学深孔复杂地层钻进技术难题与对策[J].探矿工程(岩土钻掘工程),2014,41(9):7-12. ZHANG Wei.Technical problems and counter measures for the drilling operation in complex formations of scientific deep drilling projects[J]. Exploration Engineering(Rock & Soil Drilling and Tunneling),2014,41(9):7-12.

[17] 石绍云,房勇,邓伟,等. 松散砂岩取心技术的应用[J]. 探矿工程(岩土钻掘工程),2018,45(8):34-38. SHI Shaoyun,FANG Yong,DENG Wei,et al. Application of coring technology in the loose sand stone[J]. Exploration Engineering(Rock & Soil Drilling and Tunneling),2018,45(8):34-38.

[18] 何玉云,王发民,熊正强,等. 甘肃李坝金矿区强水敏分散剥落地层冲洗液的选型与使用[J]. 探矿工程(岩土钻掘工程),2016,43(4):59-62. HE Yuyun,WANG Famin,XIONG Zhengqiang,et al. Selection and application of flushing fluid for strong water sensitive stratum in Liba gold mine of Gansu[J]. Exploration Engineering(Rock & Soil Drilling and Tunneling),2016,43(4):59-62.

[19] 李攀义,单文军,徐兆刚,等. 成膜防塌无固相钻井液体系在金鹰矿区ZK1146井中的应用研究[J]. 探矿工程(岩土钻掘工程),2015,42(10):26-30. LI Panyi,SHAN Wenjun,XU Zhaogang,et al. Research and application of solid free film-forming and anti-sloughing drilling fluid system in well ZK1146 of Jinying mining area[J]. Exploration Engineering (Rock & Soil Drilling and Tunneling),2015,42(10):26-30.



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