摘要
扭力冲击器可以将钻井液的动能转化成下部钻具的高频周向动能,从而消除粘滑振动,保护PDC钻头,提高施工效率。在广西百色及贵州毕节2口地热钻井施工过程中,受软硬夹层的影响,粘滑振动效应强烈,导致PDC钻头的复合片迅速崩碎,钻头提前报废。使用扭力冲击器-螺杆钻具复合钻进工艺,通过合理设计钻具组合和钻进参数,与单纯的螺杆钻进工艺相比,因粘滑振动得到有效控制,钻头复合片崩齿现象显著减少,使用寿命增加,平均机械钻速提高了1倍以上,整体提高了施工效率和经济效益,为软硬夹层等易发生粘滑效应的地层施工提供了新的解决方案。
The torque impactor can convert the kinetic energy of drilling fluid into high‑frequency circumferential kinetic energy of the lower drilling tool,thereby eliminating stick‑slip vibration,protecting PDC drill bits,and improving construction efficiency.During the construction of two geothermal wells in Baise,Guangxi and Bijie,Guizhou,due to the influence of soft and hard interlayers,the stick‑slip vibration effect was strong,causing the composite pieces of PDC drill bits to quickly collapse and the drill bits to be scrapped in advance.A composite drilling process of torque impactor+screw drilling tool is used.By reasonably designing the drilling tool combination and drilling parameters,compared with the simple screw drilling process,due to the effective control of stick‑slip vibration,the phenomenon of tooth collapse of the drill bit composite piece is significantly reduced,the service life is increased,and the average mechanical drilling speed is increased by more than twice,Overall construction efficiency and economic benefits has been improved.It provides a new solution for the construction of formations prone to stick‑slip effects such as soft and hard interlayers.
作者
兰永飞
韩玉香
陈明勇
王虎
LAN Yongfei;HAN Yuxiang;CHEN Mingyong;WANG Hu(No.111 Geological Team,Bureau of Geological and Mineral Exploration and Development of Guizhou Province,Guiyang Guizhou 550081,China;Guizhou Geological Engineering Survey,Design and Research Institute Co.,Ltd.,Guiyang Guizhou 550081,China)
出处
《钻探工程》
2023年第S01期399-404,共6页
Drilling Engineering
基金
贵州省科学技术厅科技支撑计划(编号:黔科合支撑[2022]一般245)
贵州省地质矿产勘查开发局地质科研项目(编号:黔地矿科合[2019]13号、黔地矿科合[2019]14号、黔地矿科合[2021]25号、黔地矿科合[2021]28号)。
关键词
扭力冲击器
螺杆钻具
粘滑振动
软硬夹层
地热井
torsion impactor
screw drilling tools
stick‑slip vibration
soft and hard interlayers
geothermal well
