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Release time：2024-07-25 09:51:39 Author：奥泽源
I. Properties and characteristics
This product is a water-soluble polymer formulated by copolymerisation of acrylic acid, acrylamide, AMPS and cationic monomer, with heat resistance up to 220 °C, salt resistance up to saturated salt, and apparent viscosity of 1% aqueous solution ≤15.0mPa-s, this reagent is mainly used in high-temperature water-based drilling fluid systems with specific gravity less than 1.6 g/cm3 , which can significantly improve drilling fluid inhibition, reduce API and HTHP filtration loss of drilling fluid and improve the quality of clay crust in well wall, and the additive volume is usually 0.3% ~ 1.0%. When used together with KSPC modifying agent to reduce the filtration loss of lignite, better effect of rheology control and filtration loss reduction is achieved.
II. Technical indicators
Technical parameters of LS-220 anti-high temperature and dip-resistant polymer drilling fluid filtration reducing agent
| Properties | Indicators | |
| Outside | White or pale yellow powder | |
| Fineness (sieve opening 0.59 mm sieve residue)，% | ≤10.0 | |
| Moisture content，% | ≤10.0 | |
| PH | 7.0-11.0 | |
| Active ingredient content，% | ≥85.0 | |
| Apparent viscosity of 1% aqueous solution，mPa-s | ≤15.0 | |
| Salt-saturated drilling mud (Hot boiling at 220°C for 16 hours) | API filtration loss , ml | ≤6.0 |
| HTHP filtering losses (test at 180°C) | ≤30.0 | |