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Modern Mining ›› 2014, Vol. 30 ›› Issue (05): 150-152.

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Research on a Double-channel Drill Rods for Horizontal Directional Drilling

Tang Dayong1,2，Sun Dai1,2，Zhang Ning1,2，Zhang Yu1,2，Sun Sheng1,2   

  1. 1.Chongqing Research Institute, China Coal Science and industry group；2. State Key Laboratory of the Gas Disaster Detecting, Prevention and Emergency Controlling
  • Online:2014-05-15 Published:2015-08-13

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Abstract: The double-channel drill rods of horizontal directional drilling system are taken as the research objects. According to the working principal of directional drilling, the structure and designing process of the double-channel drill rods are analyzed in detail. Besides that, intensity and sealing structure of the double-channel drill are calculated. The reliability of signal transmission of the double-channel drill rods is versified by some related technological experiments.

Key words: Horizontal directed-drilling, Double-channel drill rods, Signal transmission, Structural design