Directional drilling technology and equipment of pneumatic screw motor in soft seam

Authors

ZHANG Jie, Xi’an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710077, China
WANG Yi, Xi’an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp.,Xi’an 710077, China
HUANG Hanjing, Xi’an Research Institute Co. Ltd., China Coal Technology and Engineering Group Corp., Xi’an 710078, China

Abstract

Aiming at the drilling problems of shallow depth, uncontrollable trajectory and blind area of extraction in soft coal seam, the directional drilling technology of pneumatic screw motor was invented, and the directional drilling equipment consisting of pneumatic screw motor, narrow structure directional drilling rig and MWD system were formed. The air directional drilling technology and hole-completion technology were studied and developed. The technology of drilling and hole-completion solves the problem of long-distance safe drilling and hole protection of directional drilling along soft coal seam. The technology has been successfully tested in a coal mine, Huainan, with 30 test boreholes with a maximum depth of 300 m, an average of coal-drilling rate of 92.9%, and screen pipes installed in the whole hole section, extraction gas volume of boreholes is 320 000 m3 , and the average efficiency of coal roadway excavation in the test area is 9.3 m/d, achieving efficient and safe recovery of coal seams in the covered area. A new progressive gas control model of soft coal across working face has been preliminarily explored.

Keywords

soft coal seam, gas drainage, pneumatic screw motor, directional drilling, completion technology with screen pipe, Huainan

DOI

10.3969/j.issn.1001-1986.2020.02.007

Recommended Citation

ZHANG Jie, WANG Yi, HUANG Hanjing, et al. (2020) "Directional drilling technology and equipment of pneumatic screw motor in soft seam," Coal Geology & Exploration: Vol. 48: Iss. 2, Article 8.
DOI: 10.3969/j.issn.1001-1986.2020.02.007
Available at: https://cge.researchcommons.org/journal/vol48/iss2/8

Reference

[1] 孙玉宁,王永龙,翟新献,等. 松软突出煤层钻进困难的原因分析[J]. 煤炭学报,2012,37(1):117-121. SUN Yuning,WANG Yonglong,ZHAI Xinxian,et al. Analysis on reasons of drilling difficulty in soft and outburst coal seam[J]. Journal of China Coal Society,2012,37(1):117-121.

[2] 雷丰励. 松软突出煤层长钻孔装备及钻进工艺研究[J]. 煤炭科学技术,2017,45(4):93-97. LEI Fengli. Study on long borehole drilling equipment and drilling technique of soft outburst seam[J]. Coal Science and Technology,2017,45(4):93-97.

[3] 姚亚峰,张杰,韩健,等. 软硬复合煤层高效钻进装备研制及应用[J]. 煤炭科学技术,2018,46(4):76-81. YAO Yafeng,ZHANG Jie,HAN Jian,et a1. Development and application of high efficiency drilling equipment in hard-soft composite coal seam[J]. Coal Science and Technology,2018,46(4):76-81.

[4] 石智军,姚克,田宏亮,等. 煤矿井下随钻测量定向钻进技术与装备现状及展望[J]. 煤炭科学技术,2019,47(5):22-28. SHI Zhijun,YAO Ke,TIAN Hongliang,et al. Present situation and prospect of directional drilling technology and equipment while drilling measurement in underground coal mine[J]. Coal Science and Technology,2019,47(5):22-28.

[5] 姚克,田宏亮,姚宁平,等. 煤矿井下钻探装备技术现状及展望[J]. 煤田地质与勘探,2019,47(1):1-5. YAO Ke,TIAN Hongliang,YAO Ningping,et al. Present situation and prospect of drilling equipment technology in coal mine[J]. Coal Geology & Exploration,2019,47(1):1-5.

[6] 杨满成. 松软煤层钻具及成孔技术研究[D]. 太原:太原理工大学,2018. YANG Mancheng. Research on technology drilling tools and hole-formation technology in soft coal seam[D]. Taiyuan:Taiyuan University of Technology,2018.

[7] 侯红. 深槽宽叶片螺旋钻进技术在松软煤层中的应用[J]. 煤炭工程,2018,50(5):68-70. HOU Hong. Application of auger drilling technology with deep grooves and wide blades in soft coal seam[J]. Coal Engineering,2018,50(5):68-70.

[8] 赵建国,赵江鹏,许超,等. 煤矿井下复合定向钻进技术研究与应用[J]. 煤田地质与勘探,2018,46(4):202-206. ZHAO Jianguo,ZHAO Jiangpeng,XU Chao,et al. Composite directional drilling technology in underground coal mine[J]. Coal Geology & Exploration,2018,46(4):202-206.

[9] 方俊,刘飞,李泉新,等. 煤矿井下碎软煤层空气复合定向钻进技术与装备[J]. 煤炭科学技术,2019,47(2):224-229. FANG Jun,LIU Fei,LI Quanxin,et al. Air compound directional drilling technology and equipment for soft-fragmentized seam underground coal mine[J]. Coal Science and Technology, 2019,47(2):224-229.

[10] 张杰,王毅,黄寒静,等. 空气螺杆马达软煤定向成孔技术研究[J]. 煤炭科学技术,2018,46(11):114-118. ZHANG Jie, WANG Yi,HUANG Hanjing,et al. Research on directional drilling technology of air srew motor in soft coal seam[J]. Coal Science and Technology,2018,46(11):114-118.

[11] 方俊,李泉新,许超,等. 松软突出煤层瓦斯抽采钻孔施工技术及发展趋势[J]. 煤炭科学技术,2018,46(5):130-137. FANG Jun,LI Quanxin,XU Chao,et al. Constuction technology and development tendency of gas drainage borehole in soft and outburst seam[J]. Coal Science and Technology,2018,46(5):130-137.

[12] 刘飞,梁道富,刘建林,等. 碎软煤层空气复合定向钻进工艺技术[J]. 煤矿安全,2019,50(7):116-119. LIU Fei,LIANG Daofu,LIU Jianlin,et al. Air compound directional drilling technology in broken soft seam[J]. Safety in Coal Mines,2019,50(7):116-119.

[13] 张宏钧,姚克,张幼振. 松软煤层螺旋钻杆与压风复合排渣钻进技术装备[J]. 煤矿安全,2017,48(7):99-102. ZHANG Hongjun,YAO Ke,ZHANG Youzhen. Sprial drill pipe and Composite slag discharge drilling technology and equipment in soft coal seam[J]. Safety in Coal Mines,2017,48(7):99-102.

[14] 刘勇,殷新胜,刘建林. 松软煤层井下泡沫钻进工艺试验[J].煤田地质与勘探,2014,42(6):114-116. LIU Yong,YIN Xinsheng,LIU Jianlin. Underground foam drilling tests in soft seam[J]. Coal Geology & Exploration,2014,42(6):114-116.

[15] 张杰,王毅,黄寒静,等. 煤矿井下钻进用多级排渣空气螺杆马达:ZL201110026908.6[P]. 2019-03-15. ZHANG Jie,WANG Yi,HUANG Hanjing,et al. Multistage slag discharge air screw motor for coal mine underground drilling, patent:No. Zl201110026908.6[P]. 2019-03-15.