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22/11/2019#0183;#32;The class G cement having specific gravity of was used for preparation of slurries with other additives such as deformer, fluid loss additive, dispersant and cellulosebased polymer. The class G cement contains different concentrations of various components such as SiO 2, AL 2 O 3, Fe 2 O 3, TIO 2, K 2 O, P 2 O 5, CaO, MgO, SO 3 (Ou et al. 2012 ).
The effectiveness of CaAMPS#174;coNNDMA fluid loss additive (FLA) solely relies on its high adsorption onto the positively charged surfaces of cement hydrates. Adsorption of the FLA is, however, perturbed by Welan gum. This anionic polysaccharide competes with CaAMPS#174;coNNDMA for adsorption sites on the cement surface.
#0183;#32;Thus, a preferred viscosifying and fluid loss controlling additive of this invention for use in well cement compositions subjected to temperatures up to 500#176; F. is comprised of a mixture of a polymer comprised of at least one monomer which is calcium tolerant, anionic and disperses basic cement slurries, at least one monomer which hydrolyzes in basic cement slurries to generate anionic
Drilling fluid compositions and methods of using such compositions in oil, gas and water well drilling fluid operations to reduce fluid loss from the composition to the formation are disclosed. Such compositions incorporate a terpolymer formed from (a) a vinyl containing alkyl or aromatic substituted sulfonate selected from the group consisting of 2acrylamido, 2methyl propane sulfonic acid
Anionic polymer is a kind of fluid loss additive with the most extensive research and products at home and abroad. Its comonomers include nonionic and anionic monomers. Nonionic monomers mainly include am (acrylamide), NVP (Nvinylpyrrolidone), NNDMA (n, Ndimethylacrylamide), St (styrene), VI (vinyl imidazole), VFA (vinyl formamide), VP (vinylpyridine), vmaa (nmethylnvinyl acetamide), etc.
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 terpolymer of
The effectiveness of CaAMPS#174; co NNDMA fluid loss additive (FLA) solely relies on its high adsorption onto the positively charged surfaces of cement hydrates. Adsorption of the FLA is, however, perturbed by Welan gum. This anionic polysaccharide competes with CaAMPS#174; co NNDMA for adsorption sites on the cement surface.
This filter loss may be static or dynamic. If sufficient water is lost, the cement either produces nonstrengthening filter caketype deposits, or it may flash set. Typical fluid loss controllers are polyacrylamide, polyethyleneamines, carboxymethyl hydroxyethyl
Research Article Function Synergy of CrossLinked Cationic PVA Polymer to AMPSType Fluid Loss Additive Used for CementBased Material Hao Wang,1 Ming Li,1 Youzhi Zheng,2 and Tao Gu2 1School of Materials Science and Engineering, Southwest Petroleum University, Chengdu 610500, China 2Engineering Technology Research Institute, PetroChina Southwest Oil amp; Gas Field Company,
The influence of the anionic copolymer emulsifier on the properties of the polymer microspheres was assessed and the fluid loss performance of cement slurries modified by ZJD220 was evaluated. The ratio and amount of AMPS and SSS were found to have an obvious influence on the characteristics of the polymer microspheres, whose particle size distribution was uniform and monodisperse. The ZJD
The CBF system uses a cationic polymer and potassium chloride for shale inhibition, starch for fluid loss control, and a biopolymer for rheology. Tests have been developed to quantitatively measure...
GLO POLYBEN 1000 is a copolymer of anionic character. It is a watersoluble polymer, which is primarily used as a highly efficient fluid loss reducer, Viscosifier and protective colloid for shales and cutting in fresh water, calcium, sodium brines and KCL mud systems. It is designed to provide cutting encapsulation and Shale Stabilization. It is compatible with most of the drilling fluid
The additive reduces loss of water from the slurry into the formation, resulting in a better cement job. The additive is comprised of partially hydrolyzed polyvinyl acetate polymer, calcium...
Patent: Low fluid loss salt saturated cement slurries, additives and methods Title: Low fluid loss salt saturated cement slurries, additives and methods Full Record
FluidLossControl Additives. Clays, dispersants, and polymers such as starch are widely used as fluidlosscontrol additives. Sodium montmorillonite (bentonite) is the primary fluidlosscontrol additive in most waterbased drilling fluids. The colloidalsized sodiumbentonite particles are very thin and sheetlike or platelike with a large surface area, and they form a compressible filter cake
Polymeric additives designed to control fluidloss and prevent free gas migration into the cement column. Free Water/Suspension Additives. FLOSET OS . Specially formulated polymers for preventing free water formation and reducing settlement of heavy particles. Freeze Control Agents. CHUTE RELEASE . Freeze prevention aids for belt lines, chutes, etc. Used to transport mineral solids and side
controlling fluid loss also noted in cement slurr y 7 and slurry 8 that contain fluid loss additives. The presence of HPMC polymer in c ement slurry8 shows less fluid loss than the slurry 7 which
Furthermore, due to the accelerating effect of PVAGB on the hydration process of the cementbased material, PVAGB effectively improved the compatibility problem caused by the competitive adsorption between AMPS polymer chains to the limited number of Ca 2+ hydrating cement particles at the early hydration period (5) The new fluid loss additive formula,, %BWOC PVAGB, %BWOC FLA
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