Dispersant
Dispersant is a chemical that is used for reducing the viscosity of the cement slurry. Since cement slurry is prepared by mixing dry blended cement with mix-water which has many chemicals, achieving desired rheological properties in the final mixture could be a challenge. It is very important for the slurry to have good rheological properties to be able to pump it through long narrow annuli. Dispersant helps in reducing the viscosity and making slurry pumpable without too high surface pressure.