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Biopolymer RXPT is a high-purity xanthan gum biopolymer suspended in an ultra-clean mineral oil.
Biopolymer RXPT is a high-purity xanthan gum biopolymer suspended in an ultra-clean mineral oil. This type of polymer is unique when compared to most other polymers in oilfield drilling and completion applications. Xanthan gums are well known for their ability to provide extremely low-solids fluids with excellent carrying and suspending characteristics. This is due to their “shear thinning” properties. Fluids thickened with Biopolymer RXPT have a tendency to thin at higher velocities and thicken at lower velocities.
Biopolymer RXPT will not experience the separation, evident in other suspension products. It is not subject to particle settling or fluid separation under normal storage or transport conditions. Starting with an environmentally friendly fluid and utilizing our unique suspension technology, we eliminate settling of the Biopolymer RXPT particles while the product remains fully pourable. The long-term stability of the suspension provides for consistent, reliable product properties at your field locations any place in the world. Biopolymer RXPT has seen successful application in both warm climates, like the Gulf of Mexico and the Middle East, and in cold climates, like the North Sea.
Biopolymer RXPT is a versatile product and can be used in most types of water-based fluids for rheology modification, improved hole cleaning and solids suspension. It provides excellent friction reduction for coil tubing operations. It is useful over a wide pH range. Xanthan gum was the first truly stable thickener for hydrochloric acid used in the oilfield. Our Biopolymer RXPT is uniquely stable, easily handled and useful in both oilfield and non-oilfield applications.
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
Before using this product, the user is advised and cautioned to make its own determination and assessment of the safety and suitability of the product for the specific use in question and is further advised against relying on the information contained herein as it may relate to any specific use or application. It is the ultimate responsibility of the user to ensure that the product is suited and the information is applicable to the user’s specific application. Rx Marine International does not make, and expressly disclaims, all warranties, including warranties of merchantability or fitness for a particular purpose, regardless of whether oral or written, express or implied, or allegedly arising from any usage of any trade or from any course of dealing in connection with the use of the information contained herein or the product itself. The user expressly assumes all risk and liability, whether based in contract, tort or otherwise, in connection with the use of the information contained herein or the product itself. Further, information contained herein is given without reference to any intellectual property issues, as well as federal, state or local laws which may be encountered in the use thereof. Such questions should be investigated by the user.