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Retarder for High Temperature Oil Well Cementing

Product Description :

GH-9S 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.

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Performance Characteristics :

GH-9S consists of sulfonate and organic salts.

Appearance: White particles

Normal dosage: 0.1% ~ 1.0% ( 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.

Technical indicators :

ItemsSpecification
AppearanceWhite particles
Water content, %≤ 8.0
Fineness ( 0.315mm sieve residue ), %≤ 10.0
Thickening timeAdjustable
Initial consistency , Bc / 120℃, 73.9MPa, 61min≤ 30.0
Transition time, min≤ 40.0
Mutation value of thickening curve, Bc≤ 10.0
Free liquid, %≤ 1.4
Compression strength, MPa / 144℃, 21MPa, 48h≥ 14.0

 

The ingredient of cement slurry in the table is: JiaHua G class cement: 594g + silica sand 208g ( 160~200 mesh ) + distilled water 333g + GH-9S: 0.9% + G401: 1.2%

Packaging, storage and transportation ：

Be sacked with three-layer plastics bag, 25kg per bag.

Be kept away from moisture, Stored in cool and dry situation.

Storage life time is two years.

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