1. Product introduction
Aminated lignite (zr-03), a filtrate reducer for oil-based drilling fluid, is prepared from aminated lignite, oil-soluble polymer and modified asphalt.
2. Product performance index
| Item | Index |
| water content, %≤ | 10.0 |
| Mass fraction of sieve residue (80 mesh), %≤ | 10.0 |
| Electrical stability, V≥ | 500 |
| High temperature and high pressure filtration reduction rate, %≥ | 50 |
3. Purpose and function
This product is used as a high-efficiency fluid loss additive in oil-based and synthetic based drilling fluids, and will not affect the emulsion stability of drilling fluids; It has excellent filling, plugging and lubrication performance, small particle size and less loss in the process of circulating drilling. It can enhance the tension and toughness of oil-based drilling fluid filter cake to improve the wellbore stability; The temperature resistance can reach 190 ℃.
4. Usage
It is added and used in proportion with other materials, with strong compatibility; The dosage is 3% – 5%.