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A fluid loss additive for hydraulic cement which includes at least two highly hydrolyzed polyvinyl alcohol resins having different molecular weights, or a polyvinyl alcohol resin composition having a broad molecular weight distribution. The fluid loss additive is suitable for use in cement slurries which may be subjected to elevated temperatures, as is common in oil and gas drilling operations.
Dispersants and fluid loss additives for inclusion in oil field cements and methods of using the resultant compositions in oil, gas and water well cementing operations are disclosed. Such compositions incorporate a polymeric additive prepared by causticcatalyzed condensation for formaldehyde with acetone, or a substance derived from acetone, wherein said polymer includes sodium sulfonate ...
Suitable for a wide range of slurry densities FEATURES ... D256 liquid FLAC cement fluidloss additive is a costeffective solution for fluidloss control during any cementing operation. Keywords; 18CE377467; D256; FLAC; fluid loss control; fluid loss additive; cement fluid loss; cement slurry; zonal isolation ...
Comparative tables of fluid loss additives can be found in the internet . Fluid loss additives are also called filtratereducing agents. Fluid losses may occur when the fluid comes in contact with a porous formation. This is relevant for drilling and completion fluids, fracturing fluids, and cement slurries.
This translates into higher integrity cement, less failure potential and longer term durability During mixing of the cement slurry, many additives that are essential for cement integrity, such as fluid loss additives, and antisettling agents, can result in the generation of and air entrapment.
From fresh water to saturated salt application, and are compatible with most common cementing additives and cement typs and effective in a wide range of operating conditions of temperature (80350 °F) and salt environments (18 percent NaCl). Some of the benefits from using AlMoghera fluid loss additives in your cement slurry design: Maintain ...
Fluid loss additive for cement wide range. A cementing position useful in cementing oil, gas and water wells, prising water, hydraulic cement and an effective amount of water soluble fluid loss additive prised of a copolymer of acrylamide vinyl imidazole and derivatives thereof in a weight percent ratio of from about 95:5 to 5:95, said copolymer having a molecular weight range of from about ...
Control fluid loss and gas migration. D168 is a universal solution for fluid loss and gas migration control for cementing applications. The widetemperaturerange additive, part of the UNIFLAC universal fluidloss additive system, is a custommade liquid polymer that is less sensitive to small temperature or concentration variations.
Dec 30, 1986· Well cementing method using an AM/AMPS fluid loss additive blend ... The amount of water used can vary over a wide range, depending upon such factors as the required consistency of the slurry and upon the strength requirement for a particular job. Many times, the hydraulic cement must be placed within or next to a porous medium, for example ...
The performance can be varied by the addition of additives with regard to various aspects. Depending on the application of the cement, a wide variety of additives can be incorporated. These include accelerators, retarders, dispersants, extenders, weighting agents, gels, ers, and fluid loss additives.
fluid loss additives for cement flac wide range . Find here Cement Additives manufacturers suppliers We are the leading construction chemicals manufacturers exporters in India providing a wide range of Product Travis Perkins Our range of Product are specifically selected for the trade and are available for delivery across mainland UK Log We ...
Oil Gas Cement Additives. Our advanced liquid and dry cementing latices enhance several key cementing properties, allowing for simpler slurry designs. These additives can be used across a wide range of design densities to extend the slurry, enhance stability, control fluid loss, and mitigate gas migration. Section Links:
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 copolymer of acrylamide/vinyl imidazole and derivatives thereof 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.
Halad322 additive is a mild cement retardant, even at temperatures as low as 100°F (°C). Halad322 additive is compatible with a wide range of slurries, including those containing 5% KCl, 3% CaCl and up to 18% NaCl by weight of water.
A waterbased fluid loss additive containing an amphiphilic dispersant has been disclosed [52]. The fluid loss additive is a waterswellable AMPS random copolymer, and the dispersant is a hydrotrope of sodium cumene sulfonate. The ability of a hydrotrope to increase the water solubility of some compounds is known as hydrotropy.
Inadequate fluidloss control can lead to serious issues during cementing. D255 solid FLAC* cement fluidloss additive is a costeffective solution for fluidloss control during any cementing operation. It also controls lowseverity gas migration. Early development of compressive strength reduces the time spent waiting on cement. In addition,
A wide temperature range polymer that is dry blended with the cement powder or added to the mix water prior to preparation of the cement slurry. Slightly retarding fluid loss agent. Bifunctional additive that is effective both as a retarder and fluid loss control agent.
While a wide range of HPHT fluid loss chemistries are available, there is a need for cost efficient additives for HPHT ... loss additive to provide gas tight cement. The addition of Microsilica and fluid loss additive to an oilwell cement have generally synergistic effect. However, Microsilica might have
A bifunctional additive that is effective both as a retarder and fluidloss control agent over a wide temperature range. DIACEL® LX200 Cement Fluid Loss Additive SDS
OMNOVA supplies specialty wellbore chemicals used in a wide range of applications, including fluid loss control and sealing, emulsifiers, lubricants, and rheological modifiers for drilling fluids. OMNOVA also offers flow control and properties enhancement in cementing, gel additives for fracking fluids, and strengthening agents.
Acrylamide/acrylic acid copolymers are considered as effective fluid loss control additives in a wide range of oil well cements. Unlike HEC based fluid loss aditives, these copolymers can be used with calcium chloride accelerator without significantly influencing fluid loss control.
Cementing compositions are disclosed which provide for fluid loss control and use over a wide range of temperature and well conditions. The cementing compositions are comprised of water, hydraulic cement, a fluid loss additive blend comprising a particular copolymer of an acrylamide and vinyl imidazole and a terpolymer of acrylamide ...
The cementing chemicals are the chemical agents dosed in the cement to ensure the smooth cementing operation and good cementing quality. There are following 10 types of additives of cementing: accelerator, retarder, deing agent, drag reduction agent (dispersant), fluid loss additives, antigas migration agent, spacer fluid, latex, reinforcing agent and weighting agent.
Gas migration can be controlled with a cement system that includes latex, stabilizers and dispersants. These latex systems can reduce fluid loss, increase acid resistance, and improve hightemperature suspension properties. In general, latexes are colloidal in nature, with particles larger than a molecule, but smaller than grains of sand.
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