GLYSOL® SF 400M
Non-polysaccharide polymeric viscosifier
DESCRIPTION
Glysol SF 400M is a high molecular weight solid polyethylene glycols which when dissolved in bromide solutions generate viscosity characteristics comparable to hydroxyethyl cellulose. Glysol SF 400M products are packaged in 50 lb or 25 kg sacks.
BASE FLUIDS
Glysol SF 400M may be utilized in zinc bromide brine.
APPLICATIONS
- Viscosified, solids-free fluids
- Displacement spacers
FEATURES
- Ease of mixing without special mixing equipment or external heat source
- Provides comparable leak-off properties to HEC in fluid loss pills
- Stabilizes clay
- Stable viscosities to 350°F with the addition of Glysol OS
COMPARATIVE PROPERTIES FOR Glysol SF 400M VERSUS HEC
| PROPERTIES |
COMPOSITION |
| 5 lb/bbl HEC |
8 lb/bbl HEC |
10 lb/bbl Glysol SF 400M |
| H2O |
H2O |
17.0 lb/gal CaBr2/ZnBr2 |
18.0 lb/gal CaBr2/ZnBr2 |
| LSRV/0.0636 sec-1, cP |
1,300 |
6,000 |
Less than 100 |
Less than 100 |
| Fluid loss, sec* |
35 |
174 |
117 |
264 |
* Fluid loss is recorded as the number of seconds for 350 mL of viscosified solution to pass through a 2,500 mD sandbed, 1.75 inches in depth at ambient temperature.
