Oil Drilling PAC DRISPAC

Oil Drilling PAC DRISPAC

Oil Drilling PAC R is a kind of water-soluble cellulose ether derivative made from natural cellulose by chemical modification, and an important kind of water-soluble cellulose ether. Usually the sodium salt of Oil Drilling PAC R is in application.

Oil Drilling PAC R has excellent heat-resistant stability, salt tolerance and strong antibacterial activity. The slurry or fluid prepared from the product has better fluid loss reducing capability, rejection capability and higher temperature tolerance. Oil Drilling PAC R is widely used in petroleum drilling, especially in salt well and offshore oil drilling.

Oil Drilling PAC R(DRISPAC) is effective over a wide range of pH environments. It lubricates solids in the system, improve wallcake characteristics and reduces the potential for stuck pipe.

Item Specification
Presence of starch deterivatives absent
Appearance Off-white free flowing powder
Purity, % by weight, min. 98.0
Solution viscosity, cps *, min. 2000
Degree of substitution (D.S), min. 0.90
Moisture content, % max. 8.0
pH, 1% solution 6.0 – 8.5
Bulk density (kg/M3) 650 – 850
*Measured by Brookfield LVT, Spindle#3, 30rpm, at 25℃, 1% aqueous solution


Packed in 25kgs or 50lbs paper sacks. Store in a dry location.

MSDS – Material Safety Data Sheet is available upon request.


Chemical Properties

1. High Degree of Substitution

The degree of substitution is 0.85-1.4.

2. Heat-Resistant Stability

The aqueous solution has stable performance at the temperature below 80℃. When the temperature reaches up to 150℃, Oil Drilling PAC R can still show a certain viscosity and last for about 48 hours.

3. Resistance to Acids, Alkali, and Salts

When the pH value is 3-11, it has stable performance and can be applied in all kinds of extremely harsh environments.

4. Good Mutual Solubility

Oil Drilling PAC R can be mutually soluble with other cellulose ethers, water-soluble colloids, softeners and resin. When the DS of PAC is over 1.2, it gradually shows oil soluble.

5. Good Solubility

PAC R can quickly dissolve in cold and hot water with simple stirring equipment and the dissolution rate in hot water is faster. The fast dissolving PAC can fully dissolve within several minutes, and thus greatly improve convenience and production efficiency.

6. Favorable Stability

The aqueous solution of Oil Drilling PAC R owns light stability, so it has a longer shelf life as well as strong anti-bacteria and anti-mildew properties, and is non-fermented.

7. Very Low Amount of Usage

Owing to its own high degree of substitution and stability, the usage amount of Oil Drilling PAC R is 30%-60% of CMC in the same operational environments. To some extent, it reduces the use-cost of enterprises, owns high cost-effective advantages, saves the consumption of raw materials at the same time, and shows higher economic and social benefits.

8. Safety

The principal raw material of Oil Drilling PAC R is refined cotton, so it has no pharmacological effects itself, no harm in physiology, and green and environmental production process.


Sidley Chemical Co.,Ltd is one of the most famous polyanionic cellulose regular (PAC R | DRISPAC) suppliers in China. If you buy polyanionic cellulose regular (PAC R | DRISPAC) or inquiry polyanionic cellulose regular  (PAC R | DRISPAC) price,please e-mail us through: sales@celluloseether.com .