Dispersant
Drilling and completion fluids are prepared by adding various liquid and solid chemicals a liquid phase. Dispersants are aimed at breaking up solids and liquids as fine particles or droplets, thus improving the separation of particles to disperse well in the system and avoid any settling. Without dispersant, the particles may lump together and settle out of the liquid phase, changing rheological properties of the fluid system. Dispersants are also used in case of oil spills. They break up oil into very small particles, which get easily diluted or dispersed in water.