Dispersible nonclarified xanthan gum viscosifier
Achieve viscosity, including low-shear-rate viscosity, and weight-material suspension.
High-molecular-weight, nondispersible, clarified xanthan gum viscosifier
DUO-TEC NS high-molecular-weight, nondispersible, clarified xanthan gum viscosifier provides an optimized rheological profile with elevated low-shear-rate viscosity and highly shear-thinning characteristics with low n values. These characteristics frequently result in fluids with inverted flow properties—i.e., the yield point is greater than the plastic viscosity. Shear-thinning fluids have low effective viscosities at the high shear rates encountered inside the drillstring and at the bit. This low effective viscosity for minimal pressure losses and standpipe pressures enables optimized hydraulics and maximized ROP. Conversely, at the low shear rates experienced in the annulus, DUO-TEC NS viscosifier enables the fluid to have a high effective viscosity for adequately cleaning the well and suspending cuttings.
Add DUO-TEC NS viscosifier slowly through the hopper to prevent lumping and minimize waste. It should be added at the rate of approximately one 25-lbm [11.3-kg] sack every 7 to 10 min. The time required for the product to yield its ultimate viscosity depends on salinity, temperature, and shear.
The required amount of DUO-TEC NS viscosifier depends upon the desired viscosity. Special fluids and difficult hole-cleaning conditions can require higher concentrations.
The addition of thermal stabilizers and associated additives improves temperature stability in DUO-TEC NS viscosifier from 250 to 300 degF [121 to 149 degC]. DUO-TEC NS viscosifier is subject to bacterial degradation, and treatments with a biocide are recommended to prevent fermentation.
Bioassay information is available upon request. Handle as an industrial chemical, wearing protective equipment and observing the precautions described in the safety data sheet.
DUO-TEC NS viscosifier is packaged in 25-lbm [11.3-kg] or 55.1-lbm [25-kg], plastic-lined, multiwall, paper sacks. Store in a dry, well-ventilated area. Keep container closed. Store away from incompatibles. Follow safe warehousing practices regarding palletizing, banding, shrink-wrapping, or stacking.
|Typical Physical Properties|
|Physical appearance||Cream-to-tan powder|