Browsing NTNU Open by Author "Song, Xianfeng"

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    • A dynamic model of the drilling action of percussive tools 

      Song, Xianfeng; Kane, Pascal-Alexandre; Aamo, Ole Morten; Detournay, Emmanuel (Chapter, 2019)
      A phenomenological model is proposed to explain the existence of sweet spot in the relationship between the rate of penetration (ROP) and the weight-on-bit (WOB), i.e., the existence of an optimal WOB for which the ROP is ...

    • A Phenomenological Model of Percussive Drilling: Review of Experimental Evidence 

      Song, Xianfeng; Aamo, Ole Morten; Kane, Pascal-Alexandre; Detournay, Emmanuel (Chapter, 2019)
      In this paper, we review and analyze published experimental findings in light of the hypothesis that the dependence of bit-rock interface (BRI) pseudo-stiffness on the weight-on-bit (WOB) is the key factor behind the ...

    • Influence of Weight-on-Bit on Percussive Drilling Performance 

      Song, Xianfeng; Aamo, Ole Morten; Kane, Pascal-Alexandre; Detournay, Emmanuel (Peer reviewed; Journal article, 2020)
      A phenomenological model for percussive drilling systems is proposed in this paper to explain the experimentally demonstrated existence of an optimal weight-on-bit (WOB), for which the rate of penetration (ROP) is maximized. ...

    • A Timescale Analysis of Percussive Drilling 

      Song, Xianfeng (Doctoral thesis, 2021)
      Percussive drilling (PD) tools are widely recognized to be more efficient for drilling hard rock formations than conventional rotary drilling equipment. Thus, PD tools have been used to drill blast holes in mining and ...

    • Unscented Kalman Filter Based State and Parameter Estimation in Percussive Drilling Systems 

      Song, Xianfeng; Kane, Pascal-Alexandre; Abooshahab, Mohammad Ali (Chapter, 2020)
      Down-The-Hole (DTH) percussion tool is recognized for its high average rate of penetration (ROP), when drilling medium hard to very hard rock formations. This ROP which depends on the bit-rock contact conditions at the ...