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水平井PDC钻头的井底流场数值模拟

李赛 王红波 程书婷 蔡茂盛 张春江

李赛, 王红波, 程书婷, 蔡茂盛, 张春江. 水平井PDC钻头的井底流场数值模拟[J]. 金刚石与磨料磨具工程, 2024, 44(4): 476-484. doi: 10.13394/j.cnki.jgszz.2023.0129
引用本文: 李赛, 王红波, 程书婷, 蔡茂盛, 张春江. 水平井PDC钻头的井底流场数值模拟[J]. 金刚石与磨料磨具工程, 2024, 44(4): 476-484. doi: 10.13394/j.cnki.jgszz.2023.0129
LI Sai, WANG Hongbo, CHENG Shuting, CAI Maosheng, ZHANG Chunjiang. Numerical simulation of bottomhole flow field of PDC bit in horizontal well[J]. Diamond & Abrasives Engineering, 2024, 44(4): 476-484. doi: 10.13394/j.cnki.jgszz.2023.0129
Citation: LI Sai, WANG Hongbo, CHENG Shuting, CAI Maosheng, ZHANG Chunjiang. Numerical simulation of bottomhole flow field of PDC bit in horizontal well[J]. Diamond & Abrasives Engineering, 2024, 44(4): 476-484. doi: 10.13394/j.cnki.jgszz.2023.0129

水平井PDC钻头的井底流场数值模拟

doi: 10.13394/j.cnki.jgszz.2023.0129
详细信息
    作者简介:

    王红波,1978年生,博士后、硕导。主要研究方向:钻井材料与机具、采油设备及破岩机理。E-mail:tmwangbo@163.com

  • 中图分类号: TQ164; TG74; TG58; TE921.1

Numerical simulation of bottomhole flow field of PDC bit in horizontal well

  • 摘要:

    为了解决页岩水平井岩屑运移困难、钻头泥包等问题,提高聚晶金刚石复合片(polycrystalline diamond compact,PDC)PDC钻头在钻井过程中的钻井效率和使用寿命,采用数值模拟方法、低雷诺数k-ԑ湍流模型建立井底的流场模型,对PDC钻头的水力结构在不同钻井液排量、PDC钻头转速和岩屑粒径工况下的井底流场变化和岩屑运动状态进行分析并优化改进。结果表明:重力作用对低排量下的岩屑运动状态影响较大,当钻井液排量增加到一定程度后,岩屑运移效率变化较小;在旋转工况下,钻井液排量和钻头转速不匹配,降低了钻井液的冲刷作用和岩屑运移效率;在一定排量和钻头转速下,钻头转速对大粒径岩屑运移效率的提升作用大于对小粒径岩屑的;在相同的喷嘴面积下,优化后的8喷嘴钻头岩屑运移效率优于6喷嘴钻头的;相比非等径喷嘴组合,等径喷嘴组合的性能表现更均衡。

     

  • 图  1  PDC钻头简化模型

    Figure  1.  PDC drill bit simplified model

    图  2  水平井井底流场模型

    Figure  2.  Horizontal well bottom hole flow field model

    图  3  网格无关性验证

    Figure  3.  Mesh independence verification

    图  4  井底壁面流速分布

    Figure  4.  Flow velocity distribution on wellbore wall

    图  5  PDC钻头侧面岩屑运移状态

    Figure  5.  Cuttings migration state on the side of PDC bit

    图  6  井底岩屑滞留量

    Figure  6.  Cuttings retention at bottom hole

    图  7  不同转速下的井底壁面流速分布

    Figure  7.  Flow velocity distribution of bottom-hole at different rotatind speeds

    图  8  不同转速下的侧面钻井液流线

    Figure  8.  Drilling fluid streamlines on the side at different rotational speeds

    图  9  不同转速下的岩屑颗粒数量累积

    Figure  9.  Accumulation of cuttings particle quantities at different rotational speeds

    图  10  不同转速下的岩屑颗粒平均速度

    Figure  10.  Average velocity of cuttings particles at different rotational speeds

    图  11  不同粒径岩屑颗粒数量累积

    Figure  11.  Accumulation of cuttings particle quantities of different sizes

    图  12  不同粒径岩屑颗粒平均速度

    Figure  12.  Average velocity of cuttings particles of different size

    图  13  8喷嘴井底壁面流速分布

    Figure  13.  Velocity distribution on bottom wall of eight-nozzle well

    图  14  不同喷嘴数量下的岩屑滞留量

    Figure  14.  Debris retention under different nozzle numbers

    图  15  不同喷嘴组合井底壁面流速分布

    Figure  15.  Velocity distribution on the bottom wall of different nozzle combinations

    图  16  不同喷嘴组合岩屑滞留量

    Figure  16.  Debris retention of different nozzle combinations

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出版历程
  • 收稿日期:  2023-06-15
  • 修回日期:  2023-10-18
  • 录用日期:  2024-11-06
  • 网络出版日期:  2023-11-06
  • 刊出日期:  2024-08-20

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