PAC Polyanionic Cellulose

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  • pac-powder-supplier
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  • Polyanionic-Cellulose
  • pac-Polyanionic-Cellulose

Enhancing Drilling Fluids Efficiency and Performance with PAC

WOTAIchem offers Polyanionic Cellulose (PAC) for drilling fluids. It’s compatible with various chemicals for many complex environments.


Our PAC is a premium product with a high level of carboxymethyl substitution. It has a lower content of sodium chloride. PAC serves as an excellent primary filter loss reducer in water-based drilling fluids.


-Cooling and lubricating the drill bit.

-Regulating formation pressure within the well.

WOTAIchem PAC Polyanionic Cellulose Specifications

At WOTAIchem, PAC is divided into two ranges. PAC HV (polyanionic cellulose high viscosity) and PAC LV (polyanionic cellulose low viscosity).

PAC High Viscosity
Presence of Starch Derivatives Absent
Moisture% ≤10
Apparent Viscosity ≥40cP
API Filtration Volume ≤23ML
PAC Low Viscosity
Presence of Starch Derivatives Absent
Moisture% ≤10
Apparent Viscosity ≤40cP
API Filtration Volume ≤16mML

PAC Drilling Fluids

Polyanionic cellulose (PAC) is a widely used drilling fluid additive. It has a similar molecular structure to carboxymethyl cellulose (CMC). However, it is proven to be better than CMC as it reduces filtration, resistant to salt and high temperatures. And you can use PAC in temperatures up to 150°C.


The sodium salt of polyanionic cellulose is widely used in oil drilling, especially in salt wells and offshore drilling.

PAC in Fracking Fluids

PAC carries fillings for well fractures in fracking fluids. It creates pathways that control fluid flow into the well structure. This reduces fluid loss and pressure drop.

Viscosity Control

High-viscosity PAC product is a cost-effective alternative to guar gum. It helps you cut down production expenses while maintaining the desired viscosity.

Fluid Enhancement

When PAC is added to drilling fluids, it makes them thicker. The thickness is beneficial as it helps avoid risky situations, such as the clogging of wells.

Water Savings

Polyanionic cellulose reduces water loss. It decreases the water needed in the production area.

Adjusting Properties

PAC adjust the mud’s viscosity level. It’s also used to change the pH level in the mixture.

Dosage Flexibility

You can adjust the dosage of PAC polyanionic cellulose based on local conditions.

We also Provide Other Additives for Drilling Fluids


Drilling uses PAC Storage and User Guideline

Storage. Keep PAC dry to prevent clumping. Use a silo for adding PAC to the mud system, and limit it to two bags per hour.


Dosage. The recommended dosage is usually between 0.2-0.6%.


Caution. Wear gloves, masks, and goggles when dealing with PAC stock for safety. Avoid eye contact and inhaling dust, which can harm your lungs.


Advantage. Environmental Friendly. It’s compatible with most of the drilling fluid chemicals.

Collaborate with a Top Drilling Fluid Additive Manufacturer and Achieve Success Together!


What is the difference between carboxymethyl cellulose sodium and polyanionic cellulose sodium?

Carboxymethyl cellulose sodium CMC and polyanionic cellulose sodium PAC are essentially the same. The only minor difference between them is the production standard, which leads to different parameters.


Compared with CMC, PAC has the characteristics of “three high and one low.” High stability, temperature, acid, alkali, salt resistance, and low usage.


CMC refers to sodium carboxymethyl cellulose. On the other hand, PAC generally refers to the solvent-slurry method, which was developed and used overseas. It produces modified CMC with highly stable performance. This CMC is applied in wider production fields and for more complex environments. As the high degree of substitution and more uniform distribution. It meets higher process requirements. This new type of CMC is internationally recognized as PAC Polyanionic cellulose.


PAC and CMC are one substance but with different production standards and specs. Generally, the substitution degree of PAC is more than 0.90, with better uniformity under normal situations. PAC is mainly used in petroleum drilling fluids. Industrial grade CMC can also be used for the same application, with cheaper cost, but not as effective as PAC.

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