FRACSAL ULTRA
DESCRIPTION
Fracsal Ultra crosslinking additive consists of a specifically sized, sparingly-soluble borate crosslinking agent suspended in a aqueous, crosslink modifier solution. The low pour point of the winterized Fracsal Ultra makes this product ideal for use under extreme cold conditions. The standard concentration for Fracsal Ultra is 1 to 3 gal per 1,000 gal of fracturing fluid with crosslink times ranging from 1.5 to 6.5 minutes depending upon the pH, temperature, and type of polymer-based fracturing fluid system. Fracsal Ultra packaging can be customized to meet specific requirements.
PHYSICAL PROPERTIES AND ENVIRONMENTAL DATA
| Appearance: |
Tan Liquid |
| Specific Gravity: |
1.4 - 1.43 |
| Pour Point, ASTM D97: |
-24°C (-11.2°F) |
| Solubility: |
Water |
| LC50, 96-hour: |
339,300 ppm |
| Chemical Oxygen Demand: |
60 mg/L |
| Biological Oxygen Demand: |
20 mg/L |
| BTEX, S.W. 8260: |
Below detection limit of 1 ppb |
| D50 - Microtox Testing: |
| Test |
EC20 |
EC50 |
PASS/FAIL |
| MTX - Threshold MTX - Confirmation @ 191 L/m3 |
110 L/m3 (91 - 140) >91% |
210 L/m3 (180 - 250) >91% |
not applicable PASS |
CROSSLINKING TIMES AT VARIOUS pH VALUES
| pH |
7.5 |
8.5 |
9.5 |
10.5 |
11.5 |
| Static Top, min:sec |
3:13 |
3:00 |
2:12 |
3:45 |
8:40 |
|
CROSSLINK TIME TEST PARAMETERS
| Guar Base: |
2% KCl |
| Polymer Concentration: |
40 lb/1,000 gal |
| pH, adjusted with NaOH: |
7.5 - 11.5 |
| Viscosity, 300 rpm: |
38 - 42 cP |
| Crosslinking Additive Concentration: |
1.2 gal/1,000 gal |
| Temperature: |
25°C (77°F) |
|
U.S. PATENT 7,018,956
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