1. Product introduction
This product is mainly used in drilling fluid, completion fluid and workover fluid. It can be ground into calcium carbonate particles with different particle sizes according to different needs. It is mainly characterized by high purity, complete acid dissolution, bridging and aggravating.
2. Product performance index
| Item | Index | |||
| Baking loss, %≤ | 3.0 | |||
| Calcium carbonate content, %≥ | 95.0 | |||
| Particle size range | Type I | 10 mesh – 20 mesh particle mass fraction, %≥ | 70.0 | |
| Content of particles with particle size greater than 10 mesh, %≤ | 3.0 | |||
| Type II | 20 mesh – 200 mesh particle mass fraction, %≥ | 52.0 | ||
| Content of particles with particle size greater than 20 mesh, %≤ | 3.0 | |||
| Type III | Mass fraction of particles from 200 mesh to 500 mesh, %≥ | 40.0 | ||
| Type IV | Particle content from 500 mesh to 2500 mesh, %≥ | 50.0 | ||
| Type V | Content of particles with particle size less than 2500 mesh, %≥ | 50.0 | ||
| Particle content with particle size greater than 75um, %≤ | Type IV | Type V | ||
| 3.0 | ||||
3. Purpose and function
It is mainly used in oil drilling fluid, which can effectively block the formation with small voids. Especially in the drilling process of shale formation, it can seal and block the micron scale pores of shale well wall, effectively prevent the penetration of water into the formation, and then prevent the occurrence of accidents such as well wall collapse.
4. Usage
It is added and used in proportion with other materials, with strong compatibility.