Petroleum rock mechanics drilling operations and well design / Механика буровых работ по нефтесодержащим породам и проектирование скважин

Engineering systems must be designed to withstand the actual and probable loads that may be imposed on them. Hence the wall of a dam must be of adequate strength to hold out mainly the reservoir water pressure but also to withstand other loads, such as seismic occasional shocks, thermal expansions/contractions, and many others. A tennis racket is designed to take dynamic and impact loads imposed by a fast-moving flying tennis ball. It must also be adequately designed to withstand impact loads when incidentally hitting a hard ground. An oil drilling equipment must be designed to suitably and adequately drill through different types of rock materials, but at the same time ensuring that its imposing loads would not cause rock formation integrity affecting the stability of the drilled well. <...>