Fluid loss additives reduce water loss through the cement filter cake, which makes them especially useful in squeeze cementing. The Polytrol ® FL line of products are effective fluid loss control chemicals for use in differing conditions and requirements, such as high temperatures …
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The working mechanism of PVA as cement fluid loss additive depends on its water-insolubility and is based on the formation of a polymer film. This way, PVA behaves similar to latex dispersions (e.g., styrene-butadiene rubber) which are applied to prevent gas migration in hardened oil well cement. 4 Film formation occurs by coalescence of ...
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the fluid-loss additives may increase the viscosity of a cement composition slower relative to unencapsulated fluid-loss additives, and this may result in mixing the cement composition for less time and with less energy. Therefore, because a cement composition comprising an encapsulated fluid-loss additive may have a lower initial viscosity relative to a cement composition …
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However, mechanism investigation of fluid loss additive and cement was stagnant in recent years. A few years ago, Plank indicated that the working mechanism of copolymer additives was adsorption onto the surface of hydrating cement, which was evidenced by total organic carbon analyzer and zeta potential measurements [14], [15].
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Fluid loss additives reduce water loss through the cement filter cake, which makes them especially useful in squeeze cementing. The Polytrol ® FL line of products are effective fluid loss control chemicals for use in differing conditions and requirements, such as high temperatures and high salt concentrations.
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Diacel® FL Powder Cement Fluid-loss Additive is a low- to high-temperature range polymer that is dry blended with the cement powder prior to preparation of the cement slurry. Diacel® FL Winterized Liquid Cement Fluid-loss Additive is an aqueous-based liquid polymer that is added into the mix water prior to preparation of the cement slurry.
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Abstract. Oil well cement slurries commonly incorporate several admixtures such as e.g. retarder, dispersant, fluid loss additive, anti-free water agent, deer etc. Between them, additive-additive interactions may occur which can result in incompatibilities and reduced performances (the most frequent case) or, oppositely, in improved effectiveness. Here, an …
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Fluid loss additive for cement is used to maintain a consistent fluid volume within a cement slurry to ensure that the slurry performance properties remain within an acceptable range. The …
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ChampionX offers cement additives that are compatible with and dispersible in a variety of cement slurry systems. For certain applications, our additives are also available in both liquid and solid form: High-temperature fluid-loss additives; Synthetic retarders; Anti-settling and expanding agents; ers and deers; Dispersants
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ABSTRACT. With respect to the fluid loss behaviour of a cement slurry basically two stages need be considered: (i) a dynamic one corresponding to the placement and then (ii) a static one, the waiting on cement. During the first period the slurry flow is eroding the filter cake as it is growing, thus rapidly a steady state is reached where the filtration occurs through a cake of constant ...
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The UNIFLAC universal fluid-loss additive for cement product family contains universal and cost-effective solutions for fluid-loss and gas migration control for all cementing applications. Solid …
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Riteks RFL-9 is a dispersing and retarding fluid loss additive for all API classes of cement. Riteks RFL-9 is an effective fluid loss additive in primary, remedial, and squeeze cementing, and can be used in bottom hole circulating temperatures (BHCT's) between 60° and 300°F (15.5°and 149°C).
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Cement fluid loss control additives increase durability and boost performance. When a slurry is pumped against a permeable formation during a cementing operation, the resultant pressure differential can result in fluid loss if the slurry's aqueous phase leaks into the formation.
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Too much fluid loss/ filtrate means the cement slurry is undergoing dehydration, which will cause a series of quality issues of cement sheath (micro-annuli and bonding issues) Forming a mesh network that could mitigate circulation loss of the cement as well as reduce the permeability of the cement . The fluid loss control additive is a key ...
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CPFL-344 may be used for fluid loss control in any API class of cement (A, C, G, or H) higher than 400°F. (27 C to 204 C). CPFL-344 may be used in fresh to saturated salt slurries and is compatible with other cement additives such as dispersants, silica flour, retarders, deers and weighting materials. CPFL-344 is dry blended with the cement
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Fluid loss additive, liquid; maintains the water-to-solids ratio in a cement slurry during application across permeable zones or through narrow annulus; optimum temperature range is 150°F …
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Fluid loss additive for cement is used to maintain a consistent fluid volume within a cement slurry to ensure that the slurry performance properties remain within an acceptable range. The amount of fluid-loss control required for a particular operation varies widely, and is largely dependent upon: Slurry density; Water content; Formation properties
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Minimize fluid loss to the formation IsoGuard cement additive provides excellent fluid loss control of less than 50 cc in 30 minutes. Proper fluid loss control helps to ensure successful placement of the cement slurry across challenging formations – and to also mitigate annular flow through unset cement by reducing the volume of losses created by the loss of filtrate from the cement slurry.
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Fluid loss control additives are employed for maintaining a constant water/solid ratio in cement slurries downhole by controlling the rate of water loss to adjacent permeable zones through suitable viscosification; otherwise the cement slurries would lose water by filtration into these zones. This filter loss may be static or dynamic.
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Fluid loss additives prevent loss of water from the cement slurry through several mechanisms: two being (i) reducing mobility of the water molecules (ii) binding to the cement particle surfaces, promoting adsorption of water onto the cement surface, which makes it less available to be squeezed into the formation.
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Riteks RFL-9 is a dispersing and retarding fluid loss additive for all API classes of cement. Riteks RFL-9 is an effective fluid loss additive in primary, remedial, and squeeze cementing, and can be used in bottom hole circulating temperatures (BHCT's) between 60° and 300°F (15.5°and 149°C). Features and Benefits
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The UNIFLAC universal fluid-loss additive for cement product family contains universal and cost-effective solutions for fluid-loss and gas migration control for all cementing applications. Solid solutions for dry-blending in the cement include D167 and D167A. Liquid solutions for adding to the mix water include D168 and D168A.
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ML-31 is a liquid latex additive that is highly recommended to lower the equivalent circulating density (ECD) and as a fluid loss control additive in cement slurries with excellent performance. FL-73 is a custom engineered fluid loss control …
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Proven to inhibit dehydration, swelling, and fluid loss ahead of cement setting, our fluid loss additives enable successful cement placement in a wide range of temperatures and pressure …
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ticles. With the appropriate fluid loss additive in a well formulated slurry system, even at a high hydrostatic pressure, it is possible to produce a low permeability filter cake which will prevent loss of filtrate from the cement. The following parameters are controlled by fluid loss additives during cementing by reducing water leak-off:
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Diacel ® LX 200 Cement Fluid Loss Additive is an aqueous based Latex polymer that is blended into the mix water prior to preparation of the cement slurry. Diacel ® LX 200 Cement Fluid Loss Additive has a mild-retarding effect when used alone at BHCT < 125°F. Depending on the cement type and the thickening time desired, Diacel ® LX 200 Cement Fluid Loss Additive may require …
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The water/cement (W/C) ratio of the cement paste was fixed at 0.44 and FLA content in cement paste was 3% by weight of cement (bwoc). High-pressure, high-temperature fluid-loss apparatus (TG-71 type, Shenyang taige oil equipment Corporation, China) was used for the static fluid loss test of oil well cement slurries.
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Two principle classes of fluid loss additives exist: particulate ma-terials (e. g. latex) and water-soluble polymers. Both additive types decrease the filtration rate by reducing filter cake …
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All mass percentages in the preparation of cement slurry are based on Class G cement. The fluid loss additive and retarder were weighed and mixed with tap water to prepare an aqueous solution. Additionally, silica sand, amounting to half the mass of the cement, was incorporated as the solid phase. The aqueous solution is then mixed with the ...
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The exact mechanisms by which fluid-loss control agents operate are not completely understood; however, several processes are known to occur. Once cement fluid loss commences across a formation, a filter cake of cement solids is deposited on the formation surface. Fluid-loss agents decrease the filtration rate …
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Diacel ® FL Winterized Liquid Cement Fluid-Loss Additive is an aqueous-based liquid polymer that is added into the mix water prior to preparation of the cement slurry. Both products are …
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Fluid loss additive (FLA) is a commonly used addition in oil well cement slurry. The primary purpose of FLA is to inhibit the infiltration of water from the cement slurry into the porous formation under high pressure, as well as to preserve the cement slurry's flowability.
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A cementing composition useful in cementing oil, gas and water wells, comprising water, hydraulic cement and an effective amount of water soluble fluid loss additive comprised of a blend of a copolymer of acrylamide/vinyl imidazole in a weight percent ratio of from about 95:5 to 5:95, said copolymer having a molecular weight range of from about 100,000 to 3,000,000, and a …
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Important slurry parameters include density, thickening time, rheology, fluid loss and compressive strength. Cement additives like accelerators, retarders, dispersants and fluid loss additives are used to modify slurry properties for different well conditions. Laboratory equipment used in slurry testing and evaluation are also outlined. Read less
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Diacel ® FL Powder Cement Fluid-Loss Additive is a low- to high-temperature range polymer that is dry blended with the cement powder prior to preparation of the cement slurry. Diacel ® FL Winterized Liquid Cement Fluid-loss Additive is an aqueous-based liquid polymer that is added into the mix water prior to preparation of the cement slurry.. Both products are non-retarding …
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Bisley International supplies a range of fluid loss control additives used in the Oil & Gas industry. Fluid loss control additives are used to modify the flow properties of cementing systems and permeability of the cement. Bisley supplies a variety of fluid loss control additives depending on your requirements.
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The additive reduces loss of water from the slurry into the formation, resulting in a better cement job. The ideal fluid loss additive would be of low cost and have no adverse effects on the performance properties of cement. For cement slurry to seal the annulus, it must be effectively "placed," then changed from a liquid to a solid in the ...
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The fluid loss of modified aluminate phosphate cement system with excellent CO 2 resistant ability cannot meet the demand of cementing engineering and the conventional fluid loss additive lose effectiveness in this cement system. The aim of this paper is to reveal the failure mechanisms of the conventional fluid loss additive and develop one kind of amphoteric ion …
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Microsilica and fluid loss additive to an oil-well cement have generally synergistic effect. However, Microsilica might have a competing effect with fluid loss additive. n case of a I synergistic effect, Microsilica leads to reducing the amount of fluid loss additive used …
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FLAs are, therefore, used to prevent solids segregation during placement, and to control the rate of fluid leakoff in the static state. Factors affecting the use of fluid-loss-control additives (FLA) Neat cement slurries normally exhibit an uncontrolled API fluid loss of at least 1,500 cm 3 /30 min. This value is excessive for most cementing ...
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