Summary
OBC-35S is a polymer fluid loss additive for cement used in oil well and formed by copolymerization with AMPS as main monomer with good temperature and salt resistance and in combination with other anti-salt monomers. The molecules contain a large number of highly adsorptive groups such as - CONH2, - SO3H, - COOH, which plays an important role in salt resistance, temperature resistance, absorption of free water, water loss reduction, etc.
OBC-35S has good versatility and can be used in a variety of cement slurry systems. It has good compatibility with other additives and plays a part in viscosity and suspension promoting because of large molecular weight.
OBC-35S is suitable for wide temperature with high temperature resistance up to 180℃. After use, the fluidity of cement slurry system is good, stable with less free liquid and without retarding set and strength develops quickly.
OBC-35S is suitable for fresh water/salt water slurry mixing.
Technical data
|
Item |
Index |
|
Appearance |
White powder |
Cement slurry performance
|
Item |
Technical index |
Test condition |
|
Water loss，mL |
≤100 |
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-35S + 0.5% defoamer. | ||
Usage range
Temperature: ≤180°C (BHCT).
Suggestion dosage: 0.6%-3.0% (BWOC).
Package
OBC-35S is packed in a 25kg three-in-one compound bag, or packed according to customer requirements.
Remark
OBC-35S can provide liquid products OBC-35L.
