1. Definition: Poly anioniccellulose, short as PAC, is water-soluble cellulose ether derivatives made from natural cellulose, which is important water-soluble cellulose ether.
2. Physic and chemical properties
Appearance:
white powder, odorless, non-toxic, no damage to biologyHigh degree of substitution: replacement value: 0.85-1.4Thermal stability: the water solution can be stable under 80°C，and it still has certain viscosity when the temperature reaches 150°C。Resistance to acid/alkali: it has stable property when ph value is at 3-11, applicable for various extremely severe environments.Good compatibility: it is compatible with other cellulose ethers, water-soluble adhesive, softening agent and resin etc.Good solubility: it can be quickly soluble in cold and hot water, faster in hot water.Good stability: PAC solution is light stable with long-term quality guarantee period.Lowest dosage: due to the high degree of substitution and stability, under the same environment, the dosage is very small, just around 0.2-0.6%, just equivalent to 30-50% of other cellulose ethers (such as: CMC), reducing the cost, with high price competition.
3. Main application:
Application of PAC in drilling fluid
It is ideal to use PAC as the inhibiting agent and fluid loss agent. The mud fluid configured by PAC can inhibit dispersion and swelling of clay and shale, therefore making the borehole pollution under control. Due to the better homogeneity, higher degree of substitution, better transparent, anti-salt/alkali compared with CMC, PAC-HV and PAC-LV can be measured by OCMA standardization.Application of PAC in workover fluid
The workover fluid configured by PACA is low-solid, which will not hamper the permeability due to the solid and will not cause the damage to the production zone; besides, it has low fluid loss, which can reduce the water into production zone, and the entered water will create water-town phenomenon due to the emulsion plugging.
the workover fluid configured by PAC has provide the merit which other workover fluid doesn't have.
It can protect production zone from permanent damage.
It has the carrying capacity for borehole cleaning and reduced the volume of borehole maintenance.
It is resistant to penetration of water and mud-sand and with little foam;
It can be stored or used from well to well, with lower cost compare with normal workover fluid.Application of PAC in fracturing fluid
The fracturing fluid configured by PAC is with good solubility and resistant to 2%KCL. It is easy for use, and can be configured onsite with quick speed of gelling and strong sand-carrying capacity. When used in formation with low permeability, the fracturing effect will be better.
Besides, PAC can be applied as thickness control agent, emulsion stabilizer, thickening agent and binder in coating, food, cosmetics, ceramics powder, leather etc.
4. Package and Storage
The product is packed in PE bag with net weight of 25 kg; during storage and transportation, it should avoid sunshine and rain as well as moisture.
