Micro-Silica Fume In Oilfield Cementing

Micro-silica fume is also called silica fume or condensed silica fume. When ferroalloys are used to smelt ferrosilicon and industrial silicon (metal silicon), a large amount of volatile SiO2 and Si gases are produced in the mine thermoelectric furnace. It is formed by rapid oxidation, condensation and precipitation. It is a by-product of large-scale industrial smelting. The entire process needs to be recycled with dust removal and environmental protection equipment. Because of its low density, it also needs to be encrypted with encryption equipment.......

Micro-silica fume is a new type of concrete admixture. The main component is si02, the average particle size is 0.1μm, which is 1% of cement, the color ranges from light gray to carbon black, it has the characteristics of pozzolanic reaction, can be hydrated to form a silicon-rich gel, and its strength is higher than calcium hydroxide crystals. Working together with the cement hydration gel CSH, it is a highly active hydraulic cementing material. Adding it can greatly improve the physical performance of concrete. Highly active microsilica fume is an ideal admixture for bridges, dam concrete, high wear resistance, high impact concrete, shotcrete, etc. To

In recent years, micro-silica fume has gradually begun to be widely used in major oil fields. Especially in oilfield cementing, due to the use of micro-silica powder, the high temperature resistance strength decline performance of the mud solidified body is improved. It is widely used in high temperature deep wells, geothermal wells and thermal recovery wells.