Fluid loss reducer carboxymethyl starch
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Technical index of carboxymethylstarch |
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Project |
First-class products |
Secondary products |
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Granularity |
The particle size is greater than 95%for 100 meshes and 100%for 80 meshes |
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Sodium chloride Content |
≤7 |
≤10 |
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Degree of substitution |
≥0.20 |
≥0.15 |
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PH |
7.5-8.5 |
9.0-12 |
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water content |
≤10 |
≤10 |
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2%Viscosity of aqueous solution |
80-120 |
150-300 |
Sodium carboxymethyl starch, also known as carboxymethyl starch, is an anionic starch ether with the chemical formula of [c10h19o8na]n, white or yellow powder, and an electrolyte soluble in cold water. It is a kind of modified starch and belongs to ether starch. It is a water-soluble anionic polymer compound. It is tasteless, non-toxic, not easy to mildew, and soluble in water when the degree of substitution is greater than 0.2.
Sodium carboxymethyl starch for petroleum industry
CMS has stable aqueous solution and excellent performance, with the functions of bonding, thickening, water retention, emulsification, suspension and dispersion. As a mud stabilizer and water retaining agent during oil well operation, CMS can reduce water loss and improve the coalescence stability of clay particles in drilling fluid. CMS has little influence on the plastic viscosity of the mud, and has a great influence on the power and shear force. It is conducive to carrying drilling cuttings. Especially when drilling the salt gypsum layer, CMS can stabilize the drilling fluid, reduce the loss and prevent the collapse of the well wall. It is especially suitable for saline alkali wells with high salinity and high pH value.
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