煤矿安全2024，Vol.55Issue(5)：222-226,5.DOI:10.13347/j.cnki.mkaq.20230991
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
摘要
Abstract
Aiming at the problems such as low construction efficiency and high labor intensity in the process of lowering large dia-meter 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 in-ner 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 of ϕ245 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Key words
gas drainage/high-level drilling/casing lowering device/inner support component/casing lowering process分类
矿业与冶金引用本文复制引用
刘智,许超,姜磊..复杂顶板高位钻孔大直径套管下放装置设计及应用[J].煤矿安全,2024,55(5):222-226,5.基金项目
陕西省工业领域重点研发计划资助项目(2022GY-157) （2022GY-157）
