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| Customization: | Available |
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| Appearance: | White, Free Flowing Powder |
| Specific Gravity: | 0.7-0.8 |
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COPOTROL® sodium polyacrylate copolymer is a medium-molecular-weight, anionic, white powder additive used primarily for controlling filtration loss in low-salinity water base mud systems. The temperature stability of COPOTROL® is above 400°F, and is not susceptible to bacterial degradation, which makes it particularly suitable for fluid-loss control in deep, hot holes. COPOTROL® is sensitive to calcium and magnesium, therefore the total hardness of the system should be reduced and maintained below 300ppm. COPOTROL® is widely used in fresh, sea water and monovalent brines, including low-solids, non-dispersed and dispersed weighted systems.
| Test Items | Specification | Result | |
| Moisture content, % | 10.0 max | 8.2 | |
| Residue on 10-mesh screen, % | 5.0 max | 3.2 | |
| Fresh water mud | AV, mPa·s | 8.0 max | 6.0 |
| Filtrate loss vol, ml | 18.0 - 25.0 | 19 | |
| Fresh water mud with sample added | AV, mPa·s | 15.0 max | 12 |
| Filtrate loss reduction % | 45.0 min | 52.6 | |
| Salt water mud | AV, mPa·s | 10.0 max | 8 |
| Filtrate loss vol, ml | 55.0 - 65.0 | 60.2 | |
| Salt water mud with sample | AV, mPa·s | 15.0 max | 13 |
| Filtrate loss reduction % | 60.0 min | 74.5 | |
| Conclusion | Pass | ||





