Polyanionic cellulose High Viscosity (PAC HV, PAC-R, PAC Regular Grade) can be used in different drilling/completion drilling fluids, especially in salt water-based drilling fluids, seawater-based drilling fluids, and saturated-brine drilling fluids, and can reduce filtration very well. Because PAC has very good solubility in water, excellent performance of salt resistance, and reduces filtration loss.
2. Commodity Name: Polyanionic cellulose
CAS No.: [9004-32-4]
E No.: [E466]
Molecular formula: [C6H7O2(OH)2OCH2COONa]n
Synonyms: PAC, PAC HV, PAC LV, PAC R, Polyanionic cellulose
HS Code: 39123100
3. Description
"YUYU" Introduction to Oil Drilling PAC, "YUYU" PAC oilfield grade is divided into LV and HV(HV).
Slurry with PAC would form a thin but hard filter cake with low permeability, reducing water loss. Adding PAC into slurry will endow the drill with low initial gel strength, allowing the slurry to release gas inside and discard waste into the slurry pit. Similar to other suspending dispersions, the drill slurry has a shelf life which will be stable and extended after adding PAC.
Slurry with PAC is seldom affected by bacteria and requires no high pH value or corrosion resistance.
Slurry with PAC has excellent stability and will still reduce the filtration loss under 150℃ or above.
4. Type and Specifications
1) LV PAC
Product type & quality specification (standard: GB/T 5005-2010 and API 13A)
2) HV PAC
Product type & quality specification (standard: GB/T 5005-2010 and API 13A)
3) Common PAC
Product type & quality specification
Remarks: samples of different specifications are available according to customer requirements
5. Properties
1) Evenly substituted, high transparency, control viscosity and reduce filtration loss
2) Applied in fresh water, seawater and brine water based mud system
3) Formulated mud shows good filtration loss, brine resistance, and high temperature stability
4) Formulated mud shows good rheology control, to inhibit clay or shale swell or collapse, hence to prevent well contamination.
5) Stable soft soil structure, prevent well collapse.
6) While drilling through the rock surface, to slow down the solid accumulation in mud.
7) Keep down the turbulence scale, to minimize the pressure loss in reverse-flow system.
8) Improve mud yield, reduce filtration loss
9) Stable foam in mud.
6. Advantages
Widely available and low-cost polymer for fluid loss control.
It is effective at providing filtration control in most water-based drilling fluids.
It is effective in low concentrations.
It is non-toxic.
It is not subjected to bacterial fermentation and calcium contamination.
Can be used in fluid systems.
7. Package
Packing: 25kg kraft paper bag, or other packing as clients request.
8. Storage
1. Store in a cool, dry, clean, ventilated environment.
2. Material must be handled as an industrial chemical, wearing protective equipment and observing the precautions as mentioned in the MSDS.
3. Since the date of production, a preservation period should not exceed 4 years for the industrial product and 2 years for the product.
4. The products should be prevented from water and package bag damaging during transportation.