复杂顶板高位钻孔大直径套管下放装置设计及应用  

Design and application of large diameter casing lowering device for high level drilling of complex roof

作　　者：刘智 许超 姜磊 LIU Zhi;XU Chao;JIANG Lei(China Coal Technology and Engineering Group Xi’an Research Institute(Group),Xi’an 710077,China)

机构地区：[1]中煤科工西安研究院(集团)有限公司,陕西西安710077

出　　处：《煤矿安全》2024年第5期222-226,共5页Safety in Coal Mines

基　　金：陕西省工业领域重点研发计划资助项目(2022GY-157)。

摘　　要：针对煤矿井下复杂顶板高位钻孔穿越破碎层位段下放大直径套管过程中施工效率低、人工劳动强度大等问题,设计了大直径套管下放装置。介绍了大直径套管下放装置的方案制定,详细叙述了前内撑组件、后内撑组件和缸体、卡瓦等关键零部件的设计过程,并简述了利用钻机进行套管下放的工艺步骤。现场工业性试验过程中,向倾角为17°的4个定向钻孔内累计下入直径为φ245 mm长度为1.5 m的套管68根,共计102 m;大直径套管下放装置动作灵敏,性能可靠,满足了复杂顶板高位钻孔机械化下放大直径套管的功能需求。Aiming at the problems such as low construction efficiency and high labor intensity in the process of lowering large diameter casing through the broken stratum of complex roof high level drilling in coal mine,a large diameter casing lowering device is designed.This paper introduces the design of large diameter casing lowering device,describes in detail the design process of front inner support assembly,back inner support assembly,cylinder block,slip and other key parts,and describes the technological steps of casing lowering by drilling rig.During the field industrial test,68 casings with a diameter ofϕ245 mm and a length of 1.5 m were run in 4 directional boreholes with a tilt angle of 17°,totaling 102 m.The large diameter casing lowering device is sensitive and reliable,and can meet the functional requirements of mechanized large diameter casing lowering in complex roof high level drilling.

关 键 词：瓦斯抽采 高位钻孔 套管下放装置 内撑组件 套管下放工艺 

分 类 号：TD41[矿业工程—矿山机电]