Suspension stabilizer products’ failure mechanism and consequences for cement slurry at extremely high temperatures

The failure mechanism of current suspension stabilizer products must be examined in order to improve the sedimentation stability of cement slurry under extremely high temperatures, get around the temperature resistance bottleneck of suspension stabilizers, and satisfy the cementing requirements of deep and ultra-deep wells. This will serve as a guide for improving suspension stabilizer preparation techniques. The research subjects were eleven widely used suspension stabilizer products. Their failure causes were investigated in combination with solution viscosity, extended DLVO model calculations, and molecular structure alterations, and their suspension performance in cement slurry and associated parameters were assessed. The findings show that electrostatic repulsive potential energy determines the suspension performance of inorganic clay materials, whereas liquid viscosity determines the suspension performance of xanthan gum and amide polymers. The study’s findings shed light on how to prepare high-temperature suspension stabilizers: amide polymers are prone to hydrolysis, and the key to raising their application temperature is to lessen the nucleophilic attack of water molecules on carbonyl carbon using techniques like electronic effect, steric hindrance protection, and the addition of hydrolysis-resistant additives; inorganic materials have good thermal stability, and the key to increasing their application temperature in cement slurry systems by lowering the degree of cation dissociation. Amide polymers can also be used to modify the surface of inorganic objects.