Summary
OBC-51S is a polymer oil well cement fluid loss additive. It is copolymerized with AMPS/NN/HA, which has good temperature and salt resistance, 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-51S has good versatility, can be used in a variety of cement slurry systems, and has good compatibility with other additives. Based on OBC-50S, the product has improved its salt resistance and has a better salt resistance function.
OBC-51S has a wide application temperature and can resist high temperatures up to 230℃. Due to the introduction of HA, the suspension stability of the cement slurry system at high temperatures is better.
Suitable for fresh water/salt water slurry preparation.
Technical data
|
Item |
index |
|
Appearance |
Black or brown black powder |
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 + 0.9% OBC-51S + 0.5% defoamer. | ||
Usage range
Temperature: ≤230°C (BHCT).
Suggestion dosage: 0.6%-3.0% (BWOC).
Package
OBC-51S is packed in a 25kg three-in-one compound bag, or packed according to customer requirements.
Shelf time: 12months.
Remark
OBC-51S can provide liquid products OBC-51L.
