CEMENTSAMMENSAETNING MED FORSINKET AFBINDING, DER KAN HOLDES I PUMPEDYGTIG TILSTAND I LANG TID OG DERPAA AKTIVERES

摘要

Set delayed cement compositions capable of being retained in pumpable fluid states for long time periods and then activated to set into hard masses and methods of using such compositions for cementing zones at remote locations are provided. The compositions are comprised of hydraulic cement, water, one or more hydratable gel forming materials and one or more methylenephosphonic acid derivative set delaying agents.