Set retarded ultra fine cement compositions and methods

摘要

Set retarded ultra fine cement compositions which remain pumpable for a predictable period of time at temperatures up to about 400 DEG F. are provided. The compositions are basically comprised of an ultra fine hydraulic cement, sufficient water to form a pumpable slurry and a set retarder comprised of a water soluble aliphatic compound containing at least three carbon atoms and at least one phosphonic acid or phosphonate group.