- GH-9 consists of sulfonate and organic salts.
- The density is about 1.20 g/cm³.
- Normal dosage: 0.3% ~ 2.5% ( BWOC ).
- Suitable temperature: 60℃ ~ 180℃ ( BHCT ).
- It is used in the medium and deep well. It can prolong the thickening time effectively and increase the pumped time. It can formulate a right angle thickening cement slurry system.
- If there is the a settlement phenomenon happened to the cement slurry because of its strong dispersion performance, the appropriate amount of G302 ( oil well cement fluid loss additive ) can be added to the cement slurry.
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Retarder for High Temperature Oil Well Cementing
Product Description :
GH-9 dissolves in water quickly owing to its strong hydrophilic property. It can absorb on the surfaces of the cement slurry hydrate to inhibit contact with water and chelate with Ca2+ to prevent crystal nucleus forming early. Therefore, it can retard thickening time. And it can enhance the last strength of the cement stone because C3A shows weak adsorption performance.
Performance Characteristics :
Technical indicators :
| Items | Specification |
| Appearance | Colorless to light red liquid |
| Density, g/cm3 ( 20 ± 1 )℃ | 1.2 ± 0.03 |
| Thickening time / 90℃, 53.3MPa, 49min | ≥ 120.0 |
| Initial consistrency, Bc | ≤ 30.0 |
| Mutation value of thickening curve, Bc | ≤ 10.0 |
| Thickening time extension value, min | ≥ 60.0 |
| Sensitivity of increase, % | ≤ 25.0 |
| Sensitivity of temperature, % | ≤ 20.0 |
| Transition time, min | ≤ 40.0 |
| Free liquid / 90℃, % | ≤ 1.4 |
| Compression strength, MPa / 113℃, 20.7MPa, 24h | ≥ 14.0 |
The ingredient of cement slurry in the table is: JiaHua G class 800g + distilled water 352g + GH-9: 0.4% + G301: 1.0% + G401: 1.5%
Packaging, storage and transportation ：
- Be stored in 25L plastic barrels.
- Be kept away from moisture, Stored in cool and dry situation.
- Storage life time is one year.
