Polyanionic Cellulose
Polyanionic cellulose (PAC), or PAC for short, is a water-soluble cellulose ether derivative, chemically modified from natural cellulose. It is an important water-soluble cellulose ether, appearing as a white or slightly yellow powder, non-toxic and odorless, readily soluble in water, and possessing excellent heat resistance, salt resistance, and strong antibacterial properties. Mud prepared with this product exhibits excellent fluid loss reduction, inhibition, and high-temperature resistance properties, and is widely used in oil drilling, especially in seawater and offshore oil wells.
VEKEN's polyanionic cellulose (PAC) products are divided into two main categories: high viscosity (HV) and low viscosity (LV), both high-tech products with independent intellectual property rights. It is an anionic cellulose ether characterized by high purity, high degree of substitution, and uniform distribution of substituted atoms, and can be used as a thickener, rheology modifier, and fluid loss reducer. Both high-viscosity and low-viscosity PAC exhibit excellent fluid loss reduction effects in both freshwater and seawater muds, making them indispensable products for mud compatibility. Our company's PAC is a high-purity refined product, appearing as a white, flowing powder, and its aqueous solution is a transparent, viscous liquid. As a water-soluble polymer, PAC possesses the following functions and properties:
1. Rapidly dissolves in cold or hot water;
2. Can be used as a thickener, rheology control agent, binder, stabilizer, protective colloid, suspending agent, and water-retaining agent;
In the oil extraction industry, PAC is an excellent drilling mud treatment agent and completion fluid formulation material, exhibiting high mud-forming rate and good salt resistance. For freshwater mud, seawater mud, and saturated salt mud, PAC is an excellent filtration loss reducing agent, possessing good thickening ability and high-temperature resistance (150℃). It is suitable for formulating freshwater, seawater, and saturated brine completion fluids. Under pressure with calcium chloride, it can be formulated into completion fluids of different densities, giving the completion fluid a certain viscosity and low filtration loss. Our company's high-viscosity and low-viscosity PAC products conform to GB/T 5005 standards, European OCMA standards, and API 13A standards.
