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    Trenchless and Technical Drilling Fluids & Additives


    LTR can be used in cement slurries as either a dispersant in cement to increase compressive strength or as a retarder to delay the setting of the cement.

    LTR is effective with all Portland cements and generally added in concentrations from 0.1% and 2.5% by weight of cement. The sodium lignosulfonates are most effective at bottom hole circulating temperatures up to 60°C.

    The addition of small amounts of boric or citric acid can increase the temperature application range to 100°C.

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