PANS

Low Viscosity Polymer

The conventional polymer filtration reducers increase the viscosity of the drilling fluid with high molecular weight. However, they have adverse effects on the rheological property of the high-density drilling fluid systems, and their high liquid phase viscosity can easily lead to concerns.
Besides, the modified starch, such as LV-CMC and LV-PAC, will not resist high temperature, which makes it unsuitable for deep well applications. To solve these problems, we developed the PANS, an advanced filtrate reducer with low molecular weight, small viscosity effect, resistance to high temperature, salinity and excellent filtration control capability. PANS is synthesized polymer filtrate reducer. PANS can reduce the filtration loss, improve the mud cake quality, exhibits high temperature resistance, salinity and calcium contamination resistance. PANS has low viscosity to mud system due to narrow molecular weight scale. It is especially suitable for freshwater, brine, seawater drilling, and completion fluids. The recommended dosage is 3-7 ppb.