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Design Calculations for Air Directional Drilling

ZHANG Ya-chun1,2,LIU Qiang2,3,XIANG Jun-wen2,3, LONG Dong2   

  1. 1.School of Engineering, China University of Geosciences, Wuhan 430074, China;2.Institute of Exploration Techniques, Chinese Academy of Geological Sciences, Langfang, Hebei 065000, China;3.School of Engineering and Technology, China University of Geosciences, Beijing 100083, China
  • Received:2008-06-03 Revised:1900-01-01 Online:2009-03-26 Published:2009-03-26
  • Contact: ZHANG Ya-chun

Abstract: The well was analyzed by dividing it into the vertical portion, build-up portion and horizontal portion according to the air directional drilling characteristics. The design and method of air directional drilling were introduced. The theoretical air injection volumes at four correction methods were compared for better application of this technology. The results showed that the experimental correction method was the safest and most reliable method by taking into account of various factors, namely, the air injection volume where the theoretical down hole pressure was increased to 1.7 times was taken as the actual injection volume.

Key words: air directional drilling, correction method for air injection volume, drilling

CLC Number: 

  • P634.2
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