摘要
针对煤矿井下顶板高位大直径水平定向长钻孔施工中常规钻杆出现粘扣、弯曲、断裂等问题,分析了钻杆柱的工作状态,建立了顶板高位大直径长钻孔钻杆柱受力模型和有限元分析模型,明确了钻杆失效的主要原因,通过优化螺纹牙型和接头连接形式,研制了73 mm高韧性高强度钻杆,解决了定向钻孔扩孔钻进时钻杆断裂、粘扣等问题,满足了顶板高位大直径定向长钻孔的施工要求。
The thread gluing, bending and fracture of conventional drill pipe often occur during large diameter long horizontal directional borehole drilling at the high position of coal mine roof. The analysis is made on the working state of drill string and the stress mode of drill string and finite element analysis mode are established, the main reasons of pipe failure is defined. By optimizing thread tooth type and joint connection form, Ф73 drill pipe is developed with high toughness and strength, which can overcome drill pipe rupture, thread gluing and some other disadvantages to meet the requirements of large diameter long horizontal directional borehole drilling construction at high position of coal mine roof.
作者
董萌萌
田东庄
朱宁
DONG Meng- meng TIAN Dong-zhuang ZHU Ning(Xi＇ an Research Institute of China Coal Technology ＆ Engineering Group Corp. , Xi＇ an Shaanxi 710077, China)
出处
《探矿工程（岩土钻掘工程）》
2017年第3期48-52,共5页
Exploration Engineering:Rock & Soil Drilling and Tunneling
关键词
瓦斯抽采
定向钻进
高韧性高强度钻杆
螺纹结构
有限元分析
gas drainage
directional drilling
high toughness and high strength drill pipe
screw structure
finite element analysis
