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] 高德程. 哈达门沟矿区ZK10802钻孔复杂地层钻进工艺[J]. 现代矿业,2019,35(11):40-43. GAO Decheng. Complex formation drilling technology for drilling ZK10802 in Hadamengou mining area[J]. Modern Mining,2019,35(11):40-43.

[2] 易旺,李凯,赵凌云,等. 黔西地区钻遇地层漏失分析及堵漏措施探讨[J]. 石油化工应用,2019,38(6):13-16. YI Wang,LI Kai,ZHAO Lingyun,et al. Leakage analysis and exploration of leakage stoppage measures for drilling strata in western Guizhou[J]. Petrochemical Industry Application,2019,38(6):13-16.

[3] 董智广,常喜顺. SSF75双壁管水力反循环连续取心试验及可行性分析[J]. 西部探矿工程,1997,9(4):112-114. DONG Zhiguang,CHANG Xishun. Test of hydraulic couter-cycling continuous core drilling of SSF75 double-wall pipe and technological parallel analysis[J]. West-China Exploration Engineering,1997,9(4):112-114.

[4] 张永勤,张晓西,靳玉生,等. 中硬岩石水力反循环连续取心钻探工艺的研究与应用[J]. 北京地质,1998(2):3-5. ZHANG Yongqin,ZHANG Xiaoxi,JIN Yusheng,et al. In moderately hard rocks,the research and application of the drilling technology on the continuous coring in reversed jetting method[J]. Beijing Geology,1998(2):3-5.

[5] 虞结根. 反循环水力连续取心钻进工艺的推广应用[J]. 西部探矿工程,2002(增刊1):280-281. YU Jiegen. Promotion and application of reverse circulation hydraulic continuous core drilling technology[J]. West-China Exploration Engineering,2002(Sup.1):280-281.

[6] 武环,王德平,郭福盛. 反循环中心取样钻探技术在第三系砾岩金勘探中的应用[J]. 探矿工程(岩土钻掘工程),2006,33(10):49-51. WU Huan,WANG Deping,GUO Fusheng. Application on reverse circulation central sampling in exploration of tertiary conglomerate gold[J]. Exploration Engineering(Rock & Soil Drilling and Tunneling),2006,33(10):49-51.

[7] 薛晓辉,曾凡武,陈磊,等. 常规取心过程中页岩含气量解吸测定分析及建议[J]. 煤田地质与勘探,2015,43(5):27-30. XUE Xiaohui,ZENG Fanwu,CHEN Lei,et al. Analysis and recommendations for shale gas content measurement during conventional coring[J]. Coal Geology & Exploration,2015,43(5):27-30.

[8] 李柏军,邹润,郭超. 绳索取心技术在覆盖地层钻井中的应用[J]. 煤田地质与勘探,2019,47(3):217-222. LI Baijun,ZOU Run,GUO Chao. Application of wire line coring technique in overburden drilling[J]. Coal Geology & Exploration,2019,47(3):217-222.

[9] 尚月成,张星明. 水力反循环取心钻探效果及几个问题的看法[J]. 西部探矿工程,2000(4):109-110. SHANG Yuecheng,ZHANG Xingming. The effect of hydraulic reverse circulation coring drilling and the view of several problems[J]. West-China Exploration Engineering,2000(4):109-110.

[10] 郑阳. 水力反循环取心钻进在铜坑矿钻探生产中的应用[J]. 西部探矿工程,2006(10):204-206. ZHENG Yang. Application of hydraulic reverse circulation coring drilling in copper mine drilling[J]. West-China Exploration Engineering,2006(10):204-206.

[11] 袁超峰,袁永,刘志恒,等. 近距离陷落柱对工作面推进的影响研究[J]. 煤炭科学技术,2019,47(8):108-115. YUAN Chaofeng,YUAN Yong,LIU Zhiheng,et al. Study on influence of close collapse pillar on advancement of working face[J]. Coal Science and Technology,2019,47(8):108-115.

[12] 李振华,谢晖,李见波,等. 采动影响陷落柱活化导水规律试验研究[J]. 中南大学学报(自然科学版),2014,45(12):4377-4383. LI Zhenhua,XIE Hui,LI Jianbo,et al. Experimental study of mining effect on collapse column activated water conducting mechanism[J]. Journal of Central South University(Science and Technology),2014,45(12):4377-4383.

[13] 陈礼干. 坑内单管水力反循环取心钻探技术研究[J]. 矿产与地质,2001,15(4):284-289. CHEN Ligan. Study on hydraulic anti-revolve core sampling technique of pit boring with single tube[J]. Mineral Resources and Geology,2001,15(4):284-289.

[14] 梅安平. 全孔水力反循环PDC钻头理论设计研究[J]. 煤矿机械,2015,36(12):23-26. MEI Anping. Theoretical design of PDC coring drill bit in entire-hole reverse circulation drilling[J]. Coal Mine Machinery,2015,36(12):23-26.

[15] 麻坦,郜晓勇. 牛D1井复杂构造带绳索取心钻探工艺技术研究[J]. 探矿工程(岩土钻掘工程),2017,44(4):19-22. MA Tan,GAO Xiaoyong. Research on wire-line core drilling technology for Niu D1 well in complex structural belt[J]. Exploration Engineering(Rock & Soil Drilling and Tunneling),2017,44(4):19-22.

[16] 高玉良,杨尹成,张萧牧. 连云港太和磷矿破碎漏失地层岩芯钻进工艺[J]. 西部探矿工程,2012(7):39-40. GAO Yuliang,YANG Yincheng,ZHANG Xiaomu. Core drilling technology of broken and lost Formation in Taihe phosphate ore in Lianyungang[J]. West-China Exploration Engineering,2012(7):39-40.

[17] 张永勤. 水力反循环连续取心钻探技术的发展与前瞻[J]. 探矿工程(岩土钻掘工程),1999,24(增刊1):154-157. ZHANG Yongqin. Development and prospect of hydraulic reverse circulation continuous coring drilling technology[J]. Exploration Engineering(Rock & Soil Drilling and Tunneling),1999(Sup.1):154-157.

[18] 张希浩,冯德强,韦念龙. 水力输岩过程中岩心的堵塞及预防[J]. 探矿工程(岩土钻掘工程),1989,14(5):36-40. ZHANG Xihao,FENG Deqiang,WEI Nianlong. Core plugging and prevention in the process of hydraulic rock transport[J]. Exploration Engineering(Rock & Soil Drilling and Tunneling),1989,14(5):36-40.



To view the content in your browser, please download Adobe Reader or, alternately,
you may Download the file to your hard drive.

NOTE: The latest versions of Adobe Reader do not support viewing PDF files within Firefox on Mac OS and if you are using a modern (Intel) Mac, there is no official plugin for viewing PDF files within the browser window.