Low density high strength slurry is mainly prepared by the oil well cement, cenosphere, strengthening agent and relevant additives. The density of the slurry system can reach to 1.20 ~ 1.70 g/cm3, and has the quality such as high compressive strength, low permeability, low free liquid and stability ect. Its performance is much better than common low density slurry.
The application prospect of low density high strength cement slurry
1)The low density high strength cement slurry can be used in the low pressure easy leakage well cementing. Compare to the same density cenosphere low density cement slurry, the low density high strength cement slurry has good stability, high strength, short wait-thickening time and the slurry’s volume is not shrinkage at normal pressure. These performances can prevent the well leaking and get a good cementing effect.
2) Low density high strength cement slurry can be used in the shallow gas well cementing. This kind cement slurry can form grain filling and gradation, have more closely mesh structure, can form the denser set cement. This can jam gas migration channel, and achieve the purpose of anti-gas channeling.
3) Low density high strength cement slurry can be used in the direction well and vertical well cementing work. The direction well and vertical well has strict requirements to the uniform and stability of the cement mantle. And the slurry must has good stability and low free fluid to ensure that the cement mental has good compressive strength and tightness.
4) Low density high strength cement slurry can be used in the high strength low density cement plug work.