超短半径水平井柔性动力钻具研制  

Research and development of flexible power drilling tools for ultra-short radius horizontal wells

作　　者：郭强 张德龙 杨鹏[1] 翁炜 吴烁 GUO Qiang;ZHANG Delong;YANG Peng;WENG Wei;WU Shuo(Beijing Institute of Exploration Engineering,Beijing 100083,China;China University of Geosciences(Beijing),Beijing 100083,China)

机构地区：[1]北京探矿工程研究所,北京100083 [2]中国地质大学(北京),北京100083

出　　处：《地质装备》2024年第S01期149-154,共6页Equipment for Geotechnical Engineering

基　　金：中国地质调查局地质调查项目(编号:DD20221681);中石化地热资源开发利用重点实验室开放基金项目(编号:366500-23-ZC0607-0054)。

摘　　要：为改善浅部煤层气开采中,超短半径水平井钻进深度不足等现状,结合超短半径水平井施工工艺,本文设计并研制了超短半径井下柔性动力钻具。该钻具采用多级涡轮叶片将钻井液冲能转化为扭矩驱动钻头旋转,并串联数节柔性单元形成弯曲半径5 m的超短半径柔性动力钻具。通过对钻具开展室内机械性能测试,揭示了超短半径柔性钻具排量-转速-扭矩耦合关系,结果表明超短半径柔性动力钻具输出扭矩可达1500 N·m,满足超短半径侧钻水平井现场施工技术要求。柔性钻杆+柔性钻具组合方式可有效提高超短半径水平井侧钻深度和钻进效率,为提高浅部煤层气的采收率提供了新的技术手段。In order to improve the current situation of insufficient drilling depth of ultra-short radius horizontal wells in shallow coalbed methane extraction,combined with the construction process of ultra-short radius horizontal wells,this paper designs and develops an ultra-short radius downhole flexible power drilling tool.The tool adopts multi-stage turbine blades to convert drilling fluid impulse energy into torque to drive the drill bit,and connects several flexible units in series to form an ultra-short radius flexible power drilling tool with a bending radius of 5 m.Through the indoor mechanical performance test of the drilling tool,the coupling relationship of displacement-speed-torque of the ultra-short radius flexible drilling tool is revealed,and the result shows that the output torque of the ultra-short radius flexible power drilling tool can reach 1500 N-m,which meets the technical requirements of the field construction of the ultra-short radius side-drilling horizontal wells.The combination of‘flexible drill pipe+flexible motor’can effectively improve the drilling depth and drilling efficiency of ultra-short radius horizontal wells,which provides a new technical means to improve the recovery rate of shallow coalbed methane.

关 键 词：煤层气 水平井 超短半径 柔性钻具 

分 类 号：P634[天文地球—地质矿产勘探]