Cambridge Scholars Publishing Modelling Emergency Situations in the Drilling of Deep Boreholes

The era of easily acquiring oil and gas is over. Now, to extract these resources, deep vertical and curvilinear, off-shore and ground-based boreholes are drilled in inclement climate conditions and in complex heterogeneous tectonic rocks. Additional novelties have also been assimilated into these technologies by the shale revolution. The techniques and methods of borehole drivage are developing so fast that scientific understanding and substantiation have no time to refine them. Therefore, as a rule, different unpredictable emergency effects and overall failures accompany these procedures. The gravest of these are buckling of the drill strings, their resonant vibrations, their sticking during dragging and twisting, the self-triggering of torsional relaxation vibration, and the self-excitation of forward, backward, and superfast bit whirlings. To analyse these phenomena, this volume elaborates new mathematic models and numerical methods. On the basis of these, a special software was created, which allowed new results concerning the peculiarities of the affected phenomena to be achieved. The book will be of interest to borehole designers and specialists in mechanics and applied mathematics. About the Author Valery Gulyayev is currently the Head of the Department of Mathematics of the National Transport University, Ukraine. He has been a Professor since 1985. Sergii Glazunov is the Managing Director and CEO of Smart Energy LLC. He obtained his PhD degree in 2018. Olga Glushakova is an Associate Professor in the Department of Mathematics of the National Transport University, Ukraine. She has published more than 40 scientific papers and one monograph. Elena Vashchilina is an Associate Professor in the Department of Mathematics of the National Transport University, Ukraine. She obtained her PhD degree in 2001. Lyudmyla Shevchuk is an Assistant Lecturer in the Department of Mathematics of the National Transport University, Ukraine. She has published 20 scientific papers and one monograph. Nataliya Shlyun is an Assistant Lecturer in the Department of Mathematics of the National Transport University, Ukraine. She obtained her PhD degree in 2018. Elena Andrusenko is an Associate Professor in the Department of Mathematics of the National Transport University, Ukraine. She has published more than 40 scientific papers and one monograph.