Fluid-Circulation-Effects-on-Torque-and-Drag-Results-a-New-Take-on-an-Old-Subject PDF 2
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The hydraulic effects on torque and drag modelling have been thoroughly studied in the past, yet their interpretation still causes a lot of misunderstandings and confusions.<br>Historical models disregard the circulation effects and focus on the fluid mass by employing buoyancy forces based on Archimedes principle. On the other hand, the<br>reference model including the fluid circulation effects, introduced by R. F. Mitchell in the 1990s, consists in computing the forces due to internal and external fluids along the<br>drill-string. The first type of models called Archimedes method directly produces an
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Fluid-Circulation-Effects-on-Torque-and-Drag-Results-a-New-Take-on-an-Old-Subject PDF 2
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