High-temperature and salt-resistant filtration loss reducer for oilfield drilling additives.

High-temperature and salt-resistant fluid loss additive is a new type of fluid loss agent with a temperature resistance of up to 150°C and salt resistance up to saturation. This product not only provides excellent fluid loss control but also significantly improves the rheology of the mud. The mud exhibits strong contamination resistance, stable performance, easy handling, and simple maintenance. It can be used in both freshwater and saltwater mud systems, and its effectiveness is particularly outstanding in deep and ultra-deep wells.
It is suitable for use as a fluid loss additive in oilfield drilling fluids. This product has the following properties:
1. It significantly reduces fluid loss, with API fluid loss and high-temperature high-pressure fluid loss comparable to other similar products.
2. It is especially suitable for medium and deep well operations. After aging at 180°C for 16 hours, its performance remains largely unchanged.
 3. It forms a thin, tough filter cake, which reduces friction, increases lubricity, and improves rotational speed. It can be used in deviated and horizontal wells.
 4. It has a wide range of applications and can be used in various water-based drilling fluid systems, including freshwater, seawater, and 15% brine. It is compatible with other drilling fluid additives. The addition of this product significantly reduces fluid loss without affecting other properties.
5. This product is a free-flowing powder, non-toxic and harmless, easily soluble in water, and convenient to add. It can be added at any time during drilling operations.