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barite sag stresses
dril.	оседание барита под воздействием силы тяжести, приводящее к расслоению бурового раствора (When weighted muds are used in highly deviated wells, there is the tendency for barite to settle towards the low side of the hole, creating a stratification of lighter mud on top and heavier mud on bottom. While sag is more of a problem in angled wells, it has also been observed in vertical wells. Dorian Roman)
oil	осаждение барита (twinkie)