Volume 38 Issue 6
Dec.  2010
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LI Tianjun, YAN Taining, FANG Jun. The influence of dynamic head on axis force[J]. COAL GEOLOGY & EXPLORATION, 2010, 38(6): 79-80. DOI: 10.3969/j.issn.1001-1986.2010.06.017
Citation: LI Tianjun, YAN Taining, FANG Jun. The influence of dynamic head on axis force[J]. COAL GEOLOGY & EXPLORATION, 2010, 38(6): 79-80. DOI: 10.3969/j.issn.1001-1986.2010.06.017
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The influence of dynamic head on axis force

  • 1. Engineering Faculty, China University of Geosciences, Wuhan 430074, China;

  • 2. Research Center of Geotechnic Drilling and Driving Engineering, Ministry of Education, Wuhan 430074, China

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  • Received Date: June 12, 2010
  • Available Online: March 10, 2023
    Graphical Abstract
    • Abstract
  • Under conditions of circulating drilling fluid, the influence of dynamic head on the axial force of drill string can not be neglected. From fluid dynamics, the paper qualitatively and quantitatively analyzed the influence of dynamic head on drilling pressure during drilling deep wells. Lifting force is the important component of axial force of drill string. Engineering cases proved that lifting force influenced more axial force in deep wells. Therefore accurate calculation of lifting force induced by dynamic head of circulating drilling fluid has important significance for correct analysis of axial force of drill string and estimation of actual drilling pressure.
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