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[1]杨善　曾聪　闫雪峰　许州　马保松.大直径水平定向钻低流速层流下岩屑运移规律[J].油气储运,2018,37(5):1-8.
　YANG Shan,ZENG Cong,YAN Xuefeng,et al.The migration law of cuttings in the case of low-velocity laminar flow during large-diameter horizontal directional drilling[J].Oil & Gas Storage and Transportation,2018,37(5):1-8.
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大直径水平定向钻低流速层流下岩屑运移规律

《油气储运》[ISSN:1000-8241/CN:13-1093/TE] 卷: 37 期数: 2018年第5期 页码: 1-8 栏目: 出版日期: 2018-05-25
Title:
The migration law of cuttings in the case of low-velocity laminar flow during large-diameter horizontal directional drilling
作者:
杨善　曾聪　闫雪峰　许州　马保松
Author(s):
YANG Shan;  ZENG Cong;  YAN Xuefeng;  XU Zhou;  MA Baosong
关键词:
水平定向钻; 环空流场; 岩屑运移; 综合模拟装置
Keywords:
horizontal directional drilling;  annulus flow field;  cuttings migration;  comprehensive simulator
分类号:
TE89
文献标志码:
A
摘要:

大直径水平定向钻钻孔直径可达到钻杆直径的10倍以上，钻孔环形空间泥浆不仅处于不利于岩屑运移的层流状态，而且流速极低。岩屑在环空中运移效率很低，并在孔底形成稳定的岩屑床，因而易造成孔内事故。针对该问题，首先推导出柱坐标系下环空泥浆的运动微分方程组，然后通过数值模拟揭示环空泥浆流场分布及岩屑运移规律，最后使用环空岩屑运移综合模拟实验装置进行多次模拟实验。结果表明，增加泥浆PAM含量对提高大粒径岩屑运移效率效果不明显；提高环空泥浆流速，在一定程度上能够提高单颗岩屑运移效率，但同时会增加岩屑床末端回流区尺寸，使岩屑床内部压差增大。研究成果可为水平定向钻施工提供理论分析与实验结论，具有实际的工程指导意义。

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更新日期/Last Update: 2018-07-25