Poly Anionic Cellulose (PAC-R ) Supplier and Manufacturer

 

PAC-R

Polyanionic Cellulose is a high quality, water soluble polymer designed to control fluid loss and increase viscosity in water‐base muds. 


Characteristic and property

Physical appearance.............................................................................................White, free‐flowing powder
Specific Gravity..........................................................................................................1.5 – 1.6
pH (1% solution)........................................................................................................6.5 – 8.0


 


Parameter

Specification

  White creamish free flowing powder
Nature of polymer Poly anionic cellulose
Moisture content Max. 10.0%
Ph of 1% solution 8.0 to 10.0
Solubility Soluble in fresh water
Viscosity in 1% solution on AV 30.0 - 40 Cps
Purity on dry basis Min 95.0 %
Degree of substitution Min 0.95%
Toxicity Non toxic
Filtrate volume as per DFCP-7 Max. 10.00 ml

 

1. Physical State : The Material shall be in the form of free flowing powder, free from visible impurities.
2. Moisture Content at 105 ± 2 °C percent by mass : 10.0 (Maximum).
3. Apparent Viscosity (cP) of 1.0% ( w/v) Suspension of Sample at 24 ± 2°C prepared by stirring for 15 minutes in Hamilton Beach Mixer at high speed, in
(a)    Distilled Water                                                        : 60 (Minimum).
(b)    4% (w/v) NaCl (LR Grade) Solution in Distilled Water : 50 (Minimum).

4. Yield of 15 cP (Apparent Viscosity) Suspension, prepared by stirring for 15 minutes in Hamilton Beach Mixer at high speed in :
(a)    Distilled Water                                                        : 250 m3 / MT (Minimum).
(b)    4% (w/v)NaCl (LR Grade) Solution in Distilled Water   : 200m3 / MT (Minimum).


5. Sodium Carboxy Methyl Cellulose Content on Dry Basis, percent by mass : 85.0 (Minimum) .
      Degree of Substitution                                                                          : 1.0 (Minimum).

6. Performance Test in Fresh Water:

(a) At 24 ± 2 °C :
(i) Prepare a 10% Bentonite Suspension (using Bentonite conforming to VISION specification), in distilled water, age for 72 hours at 90 ± 2 °C, dilute with Distilled Water, stir for 15 minutes in Hamilton Beach Mixer at high speed Treat with 10% NaOH solution to adjust pH 9.0 — 9.5. Adjust Apparent Viscosity in the range of 15 - 20cP by dilution with Distilled Water, if necessary. Determine Apparent Viscosity ( cP) and Yield Point (lbs/100 sq. ft ) of this Base Mud using a Fann VG Meter or Equivalent and also the Filtration Loss ( ml) by API Filtration Tester at 24 ± 2 °C :
Record Apparent Viscosity, Yield Point and API Filtration Loss of the fresh water base mud.

 

(ii) Treat Base Mud at 6 (a) (i) with 0.5% (w/v) Polyanionic Cellulose (Regular Grade). Stir for 15 minutes in Hamilton Beach Mixer at high speed. Divide into two parts. Determine Apparent Viscosity (cP), Yield Point ( lbs/100 sq. ft ) and Filtration Loss ( ml) of one portion of this treated Base Mud at 24± 2 °C :
Apparent Viscosity of the treated fresh water base mud should not be less than 4.0 times the value obtained for the fresh water base mud 6 (a) (i).
Yield Point of the treated fresh water base mud should not be less than 4.0 times the value obtained for the fresh water base mud 6 (a) (i).
API Filtration Loss of the treated fresh water base mud should not be more than 40% of the value obtained for the fresh water base mud 6 (a) (i).


(b) After Hot Rolling at 120 ± 2 ° C : 
(i) Age second portion of Mud at 6 (a) (ii) in hot rolled condition at 120 ± 2°C for 24 hours. After aging, cool it down to 24 ± 2 °C . Stir in Hamilton Beach Mixer at high speed for 5 minutes. Determine Apparent Viscosity (cP), Yield Point ( lbs/100 sq. ft ) and Filtration Loss ( ml) of this treated Base Mud at 24 ± 2°C :
Apparent Viscosity of the treated hot rolled fresh water base mud should not be less than 3.0 times the value obtained for the fresh water base mud 6 (a) (i).
Yield Point of the treated hot rolled fresh water base mud should not be less than 3.0 times the value obtained for the fresh water base mud 6 (a) (i).
API Filtration Loss of the treated hot rolled fresh water base mud should not be more than 45% of the value obtained for the fresh water base mud 6 (a)(i).

7. Performance Test in Salt Water Mud: 

(a) At 24 ± 2 °C :
(i). Prepare a 10.0% (w/v) Bentonite Suspension (using Bentonite conforming to VISION specification) in Distilled Water, age for 72 hours at 90 ± 2 °C. To this suspension add 4% (w/v) Sodium Chloride (L. R. Grade), age for 24 hours at room temperature (24 ± 2 °C) and adjust pH = 9.0 — 9.5 with 10% NaOH solution. Dilute with 4% Salt Water and adjust Apparent Viscosity to 15 — 20 cP. Determine Apparent Viscosity ( cP) and Yield Point (lbs/100 sq. ft ) of this Base Mud using a Fann VG Meter or Equivalent and also the Filtration Loss ( ml) by API Filtration Tester at 24 ± 2 °C .
Record Apparent Viscosity, Yield Point and API Filtration Loss of the salt water base mud.


(ii) Treat the Base Mud prepared as per 7 (a)(i) with, 0.5%(w/v) Polyanionic Cellulose. Stir for 15 minutes in Hamilton Beach Mixer at high speed. Determine Apparent Viscosity ( cP ), Yield Point ( lbs/100 sq. ft    ) and Filtration Loss (    ml) of this treated Base Mud at 24 ± 2°C .
Apparent Viscosity of the treated base mud should not be less than 2.0 times the value obtained for base mud 7(a) (i).
Yield Point of the treated base mud should not be less than 1.5 times the value obtained for base mud 7(a) (i).
API Filtration Loss of the treated base mud should not be more than 20% of the value obtained for base mud 7 (a) (i).


8. Borate Sensitivity Test:
Prepare 0.5% (w/v) Solution of PAC (LVG) in Distilled Water. Add 5 ml of 20% (w/v) hot solution of Borax and stir for 5 minutes.
No stiff gel formation should take place.
Applications


POLYPAC R additive controls fluidloss in fresh-water, seawater, KCl, and salt muds. It forms a thin, resilient, low‐permeability filtercake which minimizes the potential for differential sticking and the invasion of filtrate and mud solids int permeable formations. POLYPAC R fluid‐loss‐control additive resists bacterial attack, eliminating the need for biocides or preservatives. It is effective in low concentrations, with normal fluid‐loss treatments ranging from 0.25 to 2 lb/bbl (0.71 to 5.7 kg/m3). POLYPAC R additive also develops viscosity to a degree that is dependent on the solids concentration, salinity, and make‐up water chemistry. A concentration of 0.67 lb/bbl (1.9 kg/m3) will produce a 15 cP mud in freshwater without supplemental solids. One lb/bbl (2.85 kg/m3) of POLYPAC R additive will produce a 15 cP viscosity in saturated sodium chloride brine. POLYPAC R additive is an anionic polymer which will attach to and encapsulate exposed shales and drill cuttings. This protective polymer "envelope" inhibits the dispersion of shale cuttings and restricts fluid interactions with exposed shales. 

Effective in low concentrations for controlling fluid‐loss and building viscosity 
Encapsulates shale particles to reduce dispersion 
Resists bacterial attack, requiring no biocides or preservatives 
Functions over a wide range of salinity, hardness, and pH levels 
Applicable in all water‐base muds, ranging from low‐solids, non‐dispersed polymer systems to high‐density, 
dispersed systems 
Compatible with all common mud‐treating additives 
Excellent environmental acceptability 
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