Product Dose

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Application  Normal Use Range
Horizontal drilling and completions 0.06 to 0.5 gal/BBL
Drill-in fluids 0.06 to 0.5 gal/BBL
Drilling large-diameter well bores 0.10 to 0.5 gal/BBL
Solids-free drilling, completion and workover fluids  0.10 to 0.5 gal/BBL
Coring fluids  0.06 to 0.5 gal/BBL
Improve hole cleaning  0.07 to 0.6 gal/BBL
Gravel packing operations  0.20 to 0.5 gal/BBL
 Acid thickener  0.40 to 0.8 gal/BBL

Performance

The performance characteristics of the xanthan gums are well established in the oil field. Typical fluid properties imparted by Biopolymer RXPTare shown in Table 1. In fresh water and most brines, the xanthan gum produces stable viscosities as high as 275° F. In saturated salt water, that thermal stability has been shown to extend beyond 300° F. The addition of an oxygen scavenger may be useful in stabilizing the rheology at high temperatures.Biopolymer RXPT has been demonstrated to have a minimal effect on the permeability of Berea sandstone cores. For wellbore cleanup, however, the xanthan gum is acid soluble and is degradable by strong oxidizing agents.

  0.06 0.12 0.18 0.24  0.36 0.48 0.60 Gal/BBL
n’ 0.8903 0.5079 0.4103 0.4266 0.3237 0.2611 0.2611  
K’ 0.0002  0.0031 0.0091 0.0119  0.0355 0.0754  0.1006  Dynes/cm2
                 
Viscosity  5  12  21 30 53 81 108 cp(170sec-1) 
                 
PV  2  3 4  5 7  9 11   cp
VP  2 4 7 11 18 27 37 Lb/100ft2

 

  0.06 0.12 0.18 0.24  0.36 0.48 0.60 Gal/BBL
n’ 0.8903 0.5079 0.4103 0.4266 0.3237 0.2611 0.2611  
K’ 0.0002  0.0031 0.0091 0.0119  0.0355 0.0754  0.1006  Dynes/cm2
                 
Viscosity  5  12  21 30 53 81 108 cp(170sec-1) 
                 
PV  2  3 4  5 7  9 11   cp
VP  2 4 7 11 18 27 37 Lb/100ft2

 

  0.06 0.12 0.18 0.24 0.36 0.48 0.60 Gal/BBL
n’ 0.7946 0.7248 0.5665 0.4470 0.4010 0.3237 0.3588  
K’ 0.0005 0.0012 0.0044 0.0118 0.0245 0.0567  0.0558 Dynes/cm2
                 
Viscosity 8 14 23 33 54 84 99 cp(170sec-1)
                 
PV  5  5   7  9  11  13 15 cp 
VP 1 5   7  9  17 27 34 Lb/100ft2

  

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