Application of Hollow Glass Sphere in Drilling Fluids and Cementing Slurry
Advantages of low-density drilling fluid prepared with Hollow Glass Sphere :
Hollow Glass Sphere is inorganic nonmetallic oxide and weakly alkaline with very stable property. It can be added into any kind of slurry without occuring any chemical reaction, which can protect the chemical stability of drilling fluid;
Because of low density and high compressive strength, Hollow Glass Sphere is very suitable for preparing low-density drilling fluid. It is widely used in deep oil wells to keep the constant stability of the density of drilling fluid;
Spherical shape, very good fluidity, perfect lubrication function, these characteristics of Hollow Glass Sphere can reduce friction during drilling process, extend the service life of drill pipes and drill bits, and greatly improve drilling effect as well as drilling performance;
The particle size of Hollow Glass Sphere is compatible with the existing drilling systems and don’t need any extra equipment. Meanwhile, Hollow Glass Sphere used in the drilling fluid can be recycled, which reducing the production costs.
Characteristics of cementing slurry prepared with Hollow Glass Sphere :
The low-density and high-strength slurry system mixed with Hollow Glass Sphere is one of the main ways to resolve the low pressure and the loss of cementing slurry which is easy to leak.
With excellent fluidity, it is easy to mix and pump;
Inorganic components, high temperature resistance and high pressure resistance make slurry very stable.
The thickening time can be adjusted according to operation need, which is easy to handle;
water loss controllable and it helps to prevent pollution;
Very low density slurry with high compressive strength. The compressive strength can reach over 15MPa in 24h;
It can improve the quality of cementation and lengthen the life of oil wells.