1. Summary
- OBC-31S is a polymer oil well cement fluid loss additive. It is copolymerized with AMPS/AM, which has good resistance to temperature and salt, as the main monomer, combined with other salt-tolerant monomers. The molecule contains a large number of -CONH2, -SO3H, -COOH and other strong adsorption groups, which play an important role in salt resistance, temperature resistance, free water adsorption, and fluid loss reduction.
- OBC-31S has good versatility, can be used in a variety of cement slurry systems, and has good compatibility with other additives.
- OBC-31S has a wide application temperature, high temperature resistance up to 180℃, good fluidity and stability of the cement slurry system, less free liquid, no retardation, and rapid strength development.
- OBC-31S is suitable for fresh water/salt water slurry mixing.
2. Technical data
|
Item |
index |
|
Appearance |
White to light yellow powder |
3. Cement slurry performance
|
Item |
Technical index |
Test condition |
|
Water loss，mL |
≤50 |
80℃,6.9MPa |
|
Thickening time,min |
≥60 |
80℃,45MPa/45min |
| Initial consistency,Bc | ≤30 | |
|
Compressive strength, MPa |
≥14 |
80℃,normal pressure,24h |
|
Free water, mL |
≤1.0 |
80℃,normal pressure |
| Cement slurry composition: 100% G grade cement (high sulfur resistance) + 44.0%fresh water + 0.7% OBC-31S + 0.5% defoamer. | ||
4. Usage range
- Temperature: ≤180°C (BHCT).
- Suggestion dosage: 0.6%-3.0% (BWOC).
