Polypac (R)

Polypac (R)POLYPAC X R polyanionic cellulose is a high-quality, water-soluble polymer designed to control fluid-loss and increase viscosity in water-base mudsTypical Physical PropertiesPhysical appearance- White, free- flowing powderSpecific gravity- 1.5-1.6pH (1% solution)- 6.5-8.0ApplicationsProduct  Bulletin POLYPAC  R  additive  controls  fluid-loss  in  freshwater,  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.    AdvantagesEffective in low concentrations for controlling fluid-loss and building viscosityEncapsulates shale particles to reduce dispersion Resists bacterial attack, requiring no biocides or preservativesFunctions over a wide range of salinity, hardness, and pH levelsApplicable in all water-base muds, ranging from low-solids, non-dispersed polymer systems to high-density, dispersed systemsApplicable in all water-base muds, ranging from low-solids, non-dispersed polymer systems to high-density, dispersed systemsExcellent environmental acceptabilityLimitationsCirculating temperature stability of approximately 300OF (149OC)Effective in systems with a total hardness <1,000 mg/L (as calcium), but can be precipitated in the combined presence of high hardness and    high pHToxicity and HandlingBioassay  information  is  available  upon  request. Handle  as  an  industrial  chemical,  wearing  protective  equipment,  and  observing  the  precautions  as  described  in  the  Material  Safety  Data  Sheet  (MSDS).   Packaging and StoragePOLYPAC  R  additive  is  packaged  in  50-lb  (22.7  kg),  heavy-duty,  multi-wall,  waterproof  sacks.      Store  in  dry,  well-ventilated  area.   Keep  container  closed.   Store  away  from  incompatibles. Follow  safe  warehousing  practices  regarding  palletizing,  banding,  shrink-wrapping  and/or  stacking