Fluid-loss additives with strong dispersive properties. The material may be slightly retarding to neutral, depending on thecomposition of the cement blend concerned.
Halad-688 additives work well with heavier (higher density) slurries. The additive is especially useful for cements blends that tend to mix “thick” or at a high viscosity. However,the strong dispersive properties of the Halad-688 additive may cause low viscosity slurries to develop settling problems. Halad-688 additives are generally recommended for use at temperatures lower than 300°F because it shows some loss of efficiency above 300°F. Using Halad-413 additive along with Halad-688 additive at higher temperatures may improve its effectiveness.The versatility of the Halad-688 and Halad-688 EXP additives allows them to be used with most API and non-API classes, including construction-type cements.This new class of additives can help lower slurry costs by several methods:
Enable use of low-cost cements.
Reduce need for other additives such as retarders.
Cover a wide range of temperatures up to 400°F.
Enhance cement compressive strength.
Enhance cement-bonding properties.
Halad-688 EXP additive in liquid form (40% active) isreadily available for use offshore and in land-basedapplications where liquid additives are required.
Halad-688 and Halad-688 EXP additives are cost-effective fluid loss additives with strong dispersive properties.Halad-688 additive is especially useful for cements and blends that tend to mix “thick” or with high viscosity.Halad-688 additive functions in the temperature range of 80° to 300°F. It causes moderate retardation below 150°F and has no effect on retardation above 200°F. The recommended concentration range is 0.1 to 1.5% bwoc.
Halad-688 additive may aid with the mixability of construction type (i.e., Type I) cements.Halad-688 and Halad-688 EXP additives generally work very well with heavier (higher-density) slurries. Low-viscosity slurries may develop settling problems caused by the strong dispersive properties of the Halad-688 additive.
Halad®-688 Fluid Loss Additive Product Specifications
101348755 (50-lb bag)
Halad®-688 EXP Fluid Loss Additive Product Specifications