Hollow Glass Microspheres
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Hollow Glass Microspheres are lightweight, low-density particles that can be used as additives in cement slurries to improve concrete quality in low-pressure and low-permeability formations. These particles have a small diameter and a density of 600-700 kg/m³, making them an ideal choice for creating a low-density glass bead slurry.
When mixed with a cement slurry in specific proportions, the Hollow Glass Microspheres displace some heavier cement particles, resulting in a lower overall density. This low-density slurry effectively improves cementing quality in low-pressure and low-permeability formations by reducing the risk of fluid channeling and ensuring that the cement job achieves a compressive strength of at least 40 MPa.
One of the advantages of using Hollow Glass Microspheres is that they offer other benefits, such as cementing additives. They are chemically inert, which means they do not react with the other components of the cement slurry or the formation fluids. This makes them a good choice for use in various wellbore conditions. Furthermore, Hollow Glass Microspheres can also improve the thermal insulation properties of the cement job, helping to prevent heat loss and maintaining the integrity of the cement structure.