Spacers are preflushes with carefully designed rheological properties. DOS-551 Spacer concentrate Function: Spacer concentrate Application: Up to 150 degC Description: [...]


DOS-501 Surfactant Function: Surfactant Application: Description: Liquid Primary purpose: Non-ionic surfactant based on primary alcohol Guidelines for use: Product should be [...]


Retarders are the chemicals that delay the setting time of the cement slurry. Use of retarders allow sufficient time for slurry placement in deep and hot wells, or those [...]

Lost circulation control materials

Lost-circulation control materials used to control loss of cement slurry to vugular or highly fractured formation by bridging and plugging thief zones. DOS-401 Lost [...]

Gas migration control additives

During setting stage the cement column doesn’t exert the hydrostatic pressure onto the formation any longer, and at this point gas migration can occur. Gas migration [...]

Fluid-loss control additives

Fluid loss control agents are additives that control leak-off of the aqueous phase of cement slurry into the formation. DOS-301 Fluid Loss Control Function: Fluid Loss [...]


Extenders are materials that lower the density of the cement system and increase slurry yield >> Extenders through water content increase >>> Clays [...]


Dispersants improve mixability properties of the cement slurry. They also act as rheology modifiers, reducing the viscosity at surface conditions without affecting downhole [...]

Antifoam and de-foam agents

Antifoam and de-foam agents are used with cement slurries to prevent excessive foaming problems during mixing which lead to pump cavitation and suction problems, and can [...]


Accelerators are used to shorten the setting stages of the hydration process and to accelerate the hardness process and the rate of compressive strength development. DOS-101 [...]
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