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    • CEMENT ADDITIVES
      • Antifoam & Defoamers
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      • Chemical Washes & Spacers
      • Dispersants
      • Extenders
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      • Gas Migration Control
      • Retarders
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      • Types of Cement Additives
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  • ABOUT
  • CEMENT ADDITIVES
    • Antifoam & Defoamers
    • Anti-Settling Additives
    • Chemical Washes & Spacers
    • Dispersants
    • Extenders
    • Fluid Loss Control
    • Gas Migration Control
    • Retarders
    • Special Additives
    • Thixotropic Agents
    • Types of Cement Additives
  • CONTACT
  • SDS
  • T&C

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Special Cement Additives

Special Cement Additives
Fibers lost circulation
Free Flow Additive

Oil-Well Cementing Application

There are a number of oil and gas additives that do not fit neatly into functional groupings. Fibers are used for controlling the lost circulation. These types of fibers (special cement additives) also improve the impact resistance and increase the cement slurry compressive strength. The flexibility of cement can be improved by the use of special additives. This increase in flexibility provides increased resistance to failure by mechanical stresses imposed on the cement during well operation. Granular salt (sodium chloride) and potassium chloride are used primarily to change the ionic nature of the water in the slurry, which helps to minimize adverse formation interactions. In cases where there is salt in the cement slurry, high concentrations of salt, up to saturation, are commonly used to prevent leaching salt from the borehole wall. Silica is used to combat strength retrogression, which is a change in the hydration products that are formed when cement is exposed to high temperatures (>110°C [230°F]). Silica is available in coarse or fine grades for cementing.

Comparison Chart

Product Data Sheets

P-CTSP (Coil Tubing, Squeeze & Plug) (pdf)Download
P-ESA (Enhanced Strength Additive) (pdf)Download
P-FA78 (Foaming Agent 78) (pdf)Download
P-FFA (Free Flow Addiive) (pdf)Download
P-SPG (Squeeze, PTA & Gas Control) (pdf)Download
P-XCA2 (Low Temperature Expanding Additive) (pdf)Download
P-XCA4 (High Temperature Expanding Additive) (pdf)Download

Types of Special Cement Additives

  

  • Petrochem - Enhanced Strength Additive Fibers (P-ESA) is a fibrous material that was developed to increase stress resistance. These cement special additives for strength include fibers that reinforce the slurry by transferring the stress evenly throughout the cement. Concentrations of .25-.50 pounds of this additive produce higher compression strength, shear strength, and tensile strength. This nontoxic inert material is combustible and should be stored away from any ignition source. Even though P-ESA is compatible with all oil and gas cement additives, it does create a high viscosity and should be pretested to be sure that the resulting slurry is not too viscous. To determine the thickening time of a cement system, this additive should be omitted because the fibers will hang on to the stirring blades in the consistometer cup and will interfere with proper operations. P-ESA is known to increase 24-hour compression strength on the order of 5-10% more than a neat cement system. This additive, which is known to make cement stronger, is a particular material that should be handled as bridging material. It can be dry blended within the cement or mixed through a mixer tub. Separation towards the top of the slurry will happen because it is light as the water. 


  • Petrochem - Foaming Agent Liquid (P-FA78) is excellent for permeability and compressive strength. But, how does cement provide additional strength with the wellbore?  Wellbores are known to exert hydrostatic pressure along different points-down-hole. This pressure is dependent on the fluid column height and the density of the fluid. Cement formations are very weak which contain holes and are able to support the hydrostatic pressure from only light fluids. Some formations will not even support a column of water. Conventional cement must always have a density in an excess of 8.33 gallons so oftentimes it is not possible to place these slurries in the wellbore. Foaming agents within cement have been developed allowing cementing in such cases and can be a great solution with formation problems that are fractured and highly permeable. Base cement slurry densities are reduced by the addition of nitrogen and the surfactant provides stabilization properties. The amount of nitrogen required is a function of the foam density and the hydrostatic pressure exerted. This cement hardener additive is highly foamable which can question the thickening time because the mechanical agitation breaks within the foam structure and large unstable bubbles will usually form. 


            Applications where this additive is effective include:

                   - Primary cementing

                   - Remedial cementing

                   - Lost-circulation 

                   - Annular thermal insulation


  • Petrochem - Free Flow Additive Powder (P-FFA) is a solid adsorption product that reduces and eliminates the build-up of static electricity when transferring materials including cement, propping agents, and minerals. The negative side effects of these material's products loss can be handled more efficiently by using this free flow additive. Not only does this product minimize static electricity, but also is effective at alleviating air entrainment due to particle agglomeration. P-FFA is a specialty designed to significantly reduce the time for off-loading of fine particulates. Here are some reasons why it’s so effective in cement slurries:

                   - Improve typical pneumatic equipment’s ability to provide fluid-like flow for bulk materials.

                   - Cement particles separate more easily

                   - Surging can be reduced

                   - Smoother cement flow

                   - Better density control

                   - Reduces material lost as high as 50%

                   - It can greatly improve the transfer of bulk materials

                   - Alters the pack-set index

                   - Reducing the effect of environmental factors such as temperature and humidity

                   - Offsets the effect of tanks with a low angle of repose including horizontal & marine tanks


  • Petrochem - Squeeze, PTA, & Gas Control Powder (P-SPG) is a pre-blended powder additive made of fluid-loss, dispersant, anti-foam, and strength additives used in medium temperature cement slurries. It can be mixed within freshwater and seawater and can be pre-dissolved in the water mix or dry blended into the cement. P-SPG is compatible with all API classes of cement and additives including Silica flour, slag, and fly ash. This cement additive offers all of the advantages of multiple additives within one product. 


  • Petrochem - Low to High Temperature Expanding Cement Additive Powders (P-XCA2 & P-XCA4) provide early expansion of the set cement thus improving bonding for better zonal isolation, preventing volume losses due to shrinkage, and reducing pipe corrosion and scale build-up. This cement expanding additive provides a positive seal to the pipe and the formation prevents fluid and gas migration within the wellbore and is compatible with all API cement/ additives. Notable statistics of P-XCA2 and P-XCA4 include:
    • P-XCA2 suggested temperature range is less than 200°F
    • P-XCA4 suggested temperature range is between 200°F and 400°F
    • Both need to be in concentrations of 5%-30% by the weight of the cement, cement type, and slurry design.
    • Both additives are available in 40x 50 LB. sacks her pallet.


Check out all of our special cement additives 

At Petrochem, we are proud of our special cement additives that have multiple advantages including making stronger products, hardening concrete using foaming, providing a smoother cement flow, building strength retrogression, and expanding slurries. We also even offer an additive that combines all the best properties of our products. Contact a real professional of cement additives today and find ways to make your slurries stronger within the oilfield industry.


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