An increase in slurry density may be necessary in order to control high-pressure wells or to prevent the deterioration of fragile wellbores. Wetting agents in the form of either heavy materials or dispersants can accomplish this. Sand, Barite, Hematite, Ilmenite and Salt are heavy materials that create greater slurry density because of their high specific gravity. Table in the video lists the specific gravity is of these materials and the maximum slurry density.
Dispersants increase density by reducing the amount of water in the slurry. They permit the cement slurry to remain pumpable even with these lower water ratios and help maintain turbulent flow with all pumping rates. Turbulence is essential in removing mud and assisting for good cementing. Common dispersants are Lignosulfonate, Organic acids and certain polymers. In addition to increasing the density of the cement, dispersant can also serve to reduce fluid loss. Watch video for more illustrating.
Dispersants increase density by reducing the amount of water in the slurry. They permit the cement slurry to remain pumpable even with these lower water ratios and help maintain turbulent flow with all pumping rates. Turbulence is essential in removing mud and assisting for good cementing. Common dispersants are Lignosulfonate, Organic acids and certain polymers. In addition to increasing the density of the cement, dispersant can also serve to reduce fluid loss. Watch video for more illustrating.
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