VISCOSIFIERS

PDT-GEL

PDT-GEL, treated sodium montmorillonite, is a finely ground, premium-grade western sodium bentonite which meets the American Petroleum Institute Specification 13A, section 4 requirements. PDT-GEL provides viscosity and gelling characteristics to most water-based drilling fluids.

  • Viscosify anionic water-based drilling fluids
  • Reduce water seepage or filtration into permeable formations
  • Form a thin filter cake with low permeability
  • Promote hole stability in poorly consolidated formations

Advantages:

  • Provides suspension for fluids weighted with barite or hematite
  • Improves hole-cleaning capacity of drilling fluids
  • Exceeds API manufacturing standards
  • Is environmentally responsible
  • Can be added directly to fresh water or freshwater drilling fluids

PDT-XAN

PDT-XAN, a powdered, biopolymer (xanthan gum); provides viscosity and suspension in freshwater, seawater, sodium bromide, potassium bromide, potassium chloride, and sodium chloride-based fluids.

  • Viscosify freshwater and brine-based fluids used in drilling, milling, under-reaming, and gravel packing operations
  • Suspend bridging agents and weighting materials in freshwater and the brine systems described above.

Advantages:

  • Disperses easily in fresh water or brine with shear
  • Provides thixotropic properties and non-Newtonian flow characteristics over a wide salinity range at low concentrations
  • Provides excellent suspension without the need of additional clays
  • Minimizes the potential for formation damage
  • Stable to 250 °F (121 °C)

PDT-GUM

PDT-GUM, Guar gum, can be used in fresh or salt water fluids to provide viscosity.

  • Increase viscosity
  • Improve hole-cleaning capability
  • Make a low-solids drilling fluid

Advantages

  • Effective in small quantities
  • Rapidly develops viscosity

PDT-CMC-HV

PDT-CMC-HV, sodium carboxyl methyl cellulose (CMC) powder, can be used for filtration control in water-based drilling fluids. PDT-CMC-HV meets API Specification 10 requirements for high-viscosity CMC products.

  • Decrease filtration rate and filter-cake thickness in fresh or brackish water-based drilling fluids
  • Promote hole stability in water-sensitive formations
  • Deflocculated saltwater systems in concentrations less than 0.25 lb/bbl (0.7 kg/m3)
  • Increase viscosity of fresh or brackish water-based drilling fluids

Advantages:

  • Effective in small concentrations
  • Effective in salt water
  • Environmentally responsible and does not ferment
  • Readily disperses when mixed through a hopper