| 摘要 |
<p>The cement slurry of the present invention is gas tight, very low strength retrogression at high temperature, and substantially no tendency to settle or segregate. The cement slurry is made with a hydraulic cement, 5-85% microsilica based on the weight of the cement, 5-250% of a high density filler material based on the weight of the cement, 0-5% of a retarder (dry weight) based on the weight of the cement, 0-12% of a thinner (dry weight) based on the weight of the cement, 0-8% of a fluid loss additive (dry weight) based on the weight of the cement, 0-30% silica flour and/or silica sand based on the weight of the cement and water in such an amount that the cement slurry has a density between 1.95 and 2.40 g/cm3.</p> |
