Barite Sag Causes, Indications & Prevention Methods
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 the bottom. The heavier layer then begins to migrate downwards along the length of the hole due to the gravitational pull. This continuous movement of the mud prevents the development of more substantial gel strengths, compounding the settling problem.
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