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Barite or weight material sag is a problem of drilling mud and it occurs when weighting material (barite, calcium carbonate, etc) separate from liquid phase and settle down. The method is based in part on continuously measuring fluid density during the first circulation after the fluid has been static after some time. However it can occur in a dynamic condition with low annular velocity. The barite sag can result in big variations in mud density in well bore. The light density is on top and heavy density at the bottom.[1]
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SPE Disciplines: Well Drilling > Drilling Fluids and Materials > Drilling fluid selection and formulation (chemistry, properties) (1.00)
Technology:
- Information Technology > Knowledge Management (0.40)
- Information Technology > Communications > Collaboration (0.40)