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Drill bit operation in an anisotropic rock

  • Mechanization and Automation of Mining Operations
  • Published:
Journal of Mining Science Aims and scope

Conclusions

  1. 1.

    A general method is proposed for description of the mechanics of a bit drilling an anisotropic rock. General expressions are derived for bit velocity and moment at the bit.

  2. 2.

    A new concept of drift velocity is defined. It describes the nonzero velocity of lateral milling at zero lateral force.

  3. 3.

    The general expression is outlined for the coefficients of milling of the borehole walls.

  4. 4.

    A relationship is established between the concept of drift velocity and the deflecting force acting upon the bit.

  5. 5.

    The applicability is defined of the concept of a deflecting force acting upon the bit in an anisotropic rock.

  6. 6.

    A general expression is derived for the bending (lateral) moment acting upon the bit.

  7. 7.

    An approximate mathematical model is constructed describing the interaction of the bit with the rock, which includes a minimal number of constants and the experiments for determination of these constants are described.

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Literature Cited

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Authors
  1. O. V. Voinov
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  2. V. A. Reutov
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Additional information

Institute of Petroleum Production Machinery, Moscow. Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 2, pp. 67–76, March–April, 1991.

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Voinov, O.V., Reutov, V.A. Drill bit operation in an anisotropic rock. Soviet Mining Science 27, 138–146 (1991). https://doi.org/10.1007/BF02500935

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  • DOI: https://doi.org/10.1007/BF02500935

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