Volume 40 Issue 3
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HU Shilei, YAN Taining, WANG Bin, LIU Hao. Model for calculating pull-back force for pipe-laying in directional drilling[J]. COAL GEOLOGY & EXPLORATION, 2012, 40(3): 66-69,73. DOI: 10.3969/j.issn.1001-1986.2012.03.016
Citation: HU Shilei, YAN Taining, WANG Bin, LIU Hao. Model for calculating pull-back force for pipe-laying in directional drilling[J]. COAL GEOLOGY & EXPLORATION, 2012, 40(3): 66-69,73. DOI: 10.3969/j.issn.1001-1986.2012.03.016
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Model for calculating pull-back force for pipe-laying in directional drilling

  • 1. Engineering Research Center of Rock-Soil Drilling and Excavation and Protection, Ministry of Education, Wuhan 430074, China;

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

  • 3. Hunan Drilling Corporation, Changsha 410007, China

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  • Received Date: May 04, 2011
  • Available Online: October 26, 2021
    Graphical Abstract
    • Abstract
  • The stress state of in-hole pipe is very complicated in pipe-laying in directional drilling, and pull-back force is the main clue when choosing the drilling rig. Therefore, stress state analysis and calculation of pull-back force play significant role in directional crossing pipe-laying. By analyzing stress state of pipe in both flexure and steady division, the force model is established. And eventually, the actual case verified that this calculation method was more actual and more accurate.
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