Blar i NTNU Open på forfatter "Detournay, Emmanuel"

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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. ...

    • Time-dependent closure of a borehole in a viscoplastic rock 

      Xie, Xiyang; Fjær, Erling; Detournay, Emmanuel (Journal article; Peer reviewed, 2019)
      The paper describes a model to predict and analyze the time-dependent closure of a borehole drilled in a soft rock subjected to an initial isotropic stress, and the build-up of stress on a rigid casing after contact with ...