2311m顺煤层超长定向钻孔高效钻进技术  

Efficient drilling technique of 2311 m ultra-long directional borehole along coal seam

作　　者：李泉新 石智军 许超 陈殿赋 LI Quanxin;SHI Zhijun;XU Chao;CHEN Dianfu(CCTEG Xi＇ an Research Institute, Xi＇ an 710077, China;Baode Coal Mine, Shenhua Shendong Coal Group Co. ,Ltd. ,Baode 036600, China)

机构地区：[1]中煤科工集团西安研究院有限公司,陕西西安710077 [2]神华神东煤炭集团有限责任公司保德煤矿,山西保德036600

出　　处：《煤炭科学技术》2018年第4期27-32,共6页Coal Science and Technology

基　　金：国家科技重大专项资助项目(2011ZX05061)

摘　　要：针对保德煤矿超长工作面瓦斯区域治理需要,提出采用国产大功率定向钻进技术与装备进行顺煤层超长定向钻孔施工。根据工作面布置情况及钻遇煤层地质特征,优化钻孔设计、优选钻进装备,利用复合定向钻进技术减小孔内摩阻,实现深孔钻进钻压的传递;利用煤层钻孔递进式延伸技术和钻孔轨迹控制技术提高煤层钻遇率,实现深孔精准钻进。结合保德煤矿生产需要施工完成了主孔深度2 311 m、孔径Φ120 mm的顺煤层超长定向钻孔。钻进结果表明:钻进装备稳定可靠,钻进工艺技术先进,钻孔日平均进尺达到200 m以上,孔深2 000 m以上单班进尺达到90 m。研究可为顺煤层超长定向钻孔施工和超长工作面区域瓦斯治理提供重要借鉴。In view of the need for gas control in the ultra-long working face in Baode Coal Mine,it is suggested to use the domestic highpower directional drilling technology and equipment to carry out the ultra-long directional borehole drilling construction along the coal seam. According to the layout of working face and the geological characteristics of coal seam,the borehole design and drilling equipment selection are optimized. By means of compound directional drilling technology,the friction within borehole is reduced and the drilling pressure transfer in deep borehole is realized. In addition,using the progressive drilling extension technology in coal seam and technology of borehole trajectory control,the drilling rate of coal seam is improved and the precise drilling in deep borehole is realized. To meet the production need of Baode Coal Mine,an ultra-long directional borehole along the coal seam with depth of 2 311 m and diameter of 120 mm has been constructed. The drilling process showed that the drilling equipment is stable and reliable,the drilling technology is advanced,the average daily drilling footage is up to more than 200 m,and the drilling footage within single shift reached 90 m for the borehole with depth more than 2 000 m. The present study can provide an important reference on both the construction of ultra-long directional borehole along coal seam and the control of gas in the ultra-long working face.

关 键 词：钻进技术 钻进装备 定向钻孔 钻进效率 超长钻孔 

分 类 号：TD41[矿业工程—矿山机电]