Polyanionic cellulose, abbreviated as PAC, is a high-quality water-soluble cellulose derivative. This product is a white or light yellow free-flowing powder that is odorless, tasteless, non-toxic, and non-fermentable. It exhibits excellent thermal stability and high salt resistance.
Polyanionic cellulose readily dissolves in water to form a viscous solution, and it is used to increase the viscosity and regulate the filtration rate of drilling fluids. It finds extensive application in water-based drilling fluids, particularly sodium polyanionic cellulose, which has gained widespread use and is commonly used in petroleum drilling operations, especially in salt wells and offshore oil drilling.
Application
PAC-HVÂ is for water-based drilling fluids, which can effectively reduce the filtration rate of many water-based oil and gas drilling fluids and may also be used to increase and stabilize viscosity to improve hole cleaning and suspension properties in a wide variety of fluid environments.
PAC-LVÂ is used in solids-laden, water-based drilling fluids, which can effectively reduce the filtration rate of many water-based drilling fluids without causing significant increases in viscosity or gel strength.
Grade & Specification
| Â Item | Specification | |
| PAC-LV | PAC-HV | |
| Presence of starch deterivatives | absent | |
| Appearance | Freely flowable powder | |
| pH value | 6.0-8.0 | 6.0-8.0 |
| Purity, % | ≥95 | ≥95 |
| Moisture, % | ≤10 | ≤10 |
| D.S. | ≥0.90 | ≥0.90 |
| Apparent Vicosity(mpa.s) | ≤40 | ≥50 |
| API Filtrate Volume(ml) | ≤16ml | ≤23ml |
Advantages
- High degree of substitution
- Thermal stability
- Salt, acid and alkalis resistance
- Good miscibility
- Good solubility
- Good stability
- Extremely low usage amount
- Green and environmental- friendly
- Deep well drilling operation
Packing
Product is packed in fiber can lined with polyethylene film or woven bags, 25kg/bag.
Storage
It should be kept away from exposure to the sun, rain and moisture in storage and transportation.
Transportation
During transportation, the products shall be moved gently to prevent damaging the packing bags. Avoid direct contact with Naked flame, when fire happens, any fire fighting equipment may be use to extinguish the fire.
Shelf Life
1 year, exceeding valid period, if the products have not lumped and can still be used.