The return of drilling fluid in large diameter horizontal directional drilling boreholes
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- 作者：Biao Shua ; biaoshucn@gmail.com" class="auth_mail" title="E-mail the corresponding author ; Baosong Mab ; mabaosong@163.com" class="auth_mail" title="E-mail the corresponding author
- 关键词：Horizontal directional drilling ; Drilling fluid ; Drilling mud pressure ; Mud return ; Reaming
- 刊名：Tunnelling and Underground Space Technology
- 出版年：2016
- 出版时间：February 2016
- 年：2016
- 卷：52
- 期：Complete
- 页码：1-11
- 全文大小：3136 K
文摘
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Calculation equation of drilling mud pressure loss was used to study the drilling mud return for the first time.
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The percentages of drilling mud return to the entry and exit points were found.
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The theoretical calculation results are quite close to the field observation.
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The effect of the elevation difference of entry and exit points on the drilling mud return was discussed.