Typical vibration measurement tools are investigated and discussed. ![]() Two evaluation methods are compared systematically, such as theoretical and measurement methods. ![]() According to past theories, indoor experiments, and field studies, the relations among ten kinds of V&S, which contain basic forms, response frequency, and amplitude, are summarized and discussed. In drilling these complex wells, the cost caused by V&S increases. The directional wells and other special trajectory drilling technologies are often used in deep water, deep well, hard rock, and brittle shale formations. ![]() Drill string vibrations and shocks (V&S) can limit the optimization of drilling performance, which is a key problem for trajectory optimizing, wellbore design, increasing drill tools life, rate of penetration, and intelligent drilling.
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