caa a22 4500 46316413X CHVBK 20180406164756.0 cr unu---uuuuu 170326e20070901xx s 000 0 eng 10.1007/s10778-007-0101-z doi (NATIONALLICENCE)springer-10.1007/s10778-007-0101-z Effect of the length of a rotating drillstring on the stability of its quasistatic equilibrium [Elektronische Daten] [V. Gulyaev, P. Lugovoi, V. Gaidaichuk, I. Solov'ev, I. Gorbunovich] A mathematical model is proposed to describe the critical quasistatic equilibrium of long rotating drillstrings. The prestress of drillstrings by the gravity and torsion forces, the gyroscopic interaction of rotary and linear motions, and the destabilizing effect of the internal flow of the drilling fluid are taken into account. The phenomena accompanying the drilling to different depths are studied numerically Springer Science+Business Media, Inc., 2007 drillstring nationallicence deep-hole drilling nationallicence quasistatic equilibrium nationallicence critical states nationallicence Gulyaev V. National University of Transport, Kyiv, Ukraine aut Lugovoi P. National University of Transport, Kyiv, Ukraine aut Gaidaichuk V. S. P. Timoshenko Institute of Mechanics, National Academy of Sciences of Ukraine, Kyiv aut Solov'ev I. National University of Transport, Kyiv, Ukraine aut Gorbunovich I. National University of Construction and Architecture, Kyiv, Ukraine aut International Applied Mechanics Springer US 43/9(2007-09-01), 1017-1023 1063-7095 43:9<1017 2007 43 10778 https://doi.org/10.1007/s10778-007-0101-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10778-007-0101-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Gulyaev V. National University of Transport, Kyiv, Ukraine aut NATIONALLICENCE 700 1- Lugovoi P. National University of Transport, Kyiv, Ukraine aut NATIONALLICENCE 700 1- Gaidaichuk V. S. P. Timoshenko Institute of Mechanics, National Academy of Sciences of Ukraine, Kyiv aut NATIONALLICENCE 700 1- Solov'ev I. National University of Transport, Kyiv, Ukraine aut NATIONALLICENCE 700 1- Gorbunovich I. National University of Construction and Architecture, Kyiv, Ukraine aut NATIONALLICENCE 773 0- International Applied Mechanics Springer US 43/9(2007-09-01), 1017-1023 1063-7095 43:9<1017 2007 43 10778 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer