DosThiox™ 99 Thixotropic Agent
Flow with Confidence, Stand with Strength
DosThiox™ 99
Gel Formation on Demand
DosThiox™ 99 is an aqueous solution when blended with a hydraulic cement comprising calcium hydroxide and/or a hydrolyzable calcium oxide and water form novel cement slurries that are pumpable and thixotropic. DosThiox™ 99 is designed to mix with the cement slurries form a gel-like structure within a short period of time after mixing which will thin when subjected to conditions of shear or stress (as for example during pumping) and which will reset to a gel-like structure when the condition of stress or shear is relieved.
Rigid, Pumping Stops Fluid Again by Force
After mixing was complete, the aqueous cement slurry was allowed to remain stationary for a period of from about four to five minutes. The slurry formed a self-supporting gel at the end of this time. The gelled aqueous cement slurry, however, was easily broken by agitation with a stirring rod or by shaking the container and when broken poured easily from the container.
Application:
Applicable at temperature less than 85 °C
Can be used with either fresh water or seawater
Must be thoroughly dispersed in the mix water before the cement is added
Benefits:
Easily pumped downwardly through the casing
Prevent the "slurry fallback"
Tends to seal off "thief zones"
