Abstract
The problem of buckling of a long spinning rod containing an internal flow of a homogeneous liquid and undergoing compression and tension is considered in the paper. The authors derive the resulting equations to model stability of deep drilling strings according to the integrated calculation scheme, involving the string body and its lower section. The problem-solving procedure is proposed. Typical examples are discussed. The critical values of parameters for the elastic equilibrium of the system are found. The stability loss forms are determined.
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Translated from Fiziko-Tekhnicheskie Problemy Razrabotki Poleznykh Iskopaemykh, No. 5, pp. 57–65, September–October, 2010
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Gulyaev, V.I., Gaidaichuk, V.V., Solov’ev, I.L. et al. Quasistatic bifurcation states of super-deep vertical drill strings. J Min Sci 46, 546–553 (2010). https://doi.org/10.1007/s10913-010-0068-8
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DOI: https://doi.org/10.1007/s10913-010-0068-8