Detailed Product Description
Hydroxyethylcellulose -HEC,hydroxyethyl cellulose
Description
Hydroxyethylcellulose - HEC is a nonionic water soluble polymer designed specifically to viscosify water-based fluids used in workover and completion operations. The resulting polymer solutions are clear, viscous and residue-free.
Application & Features
HEC is a low-solids, cost-effective viscosifier widely used in drilling, completion, workover and fracturing fluids.
Oilfield fluids containing HEC exhibit high apparent viscosity, high yield point and low fragile gel strength. Its shear-thinning behavior known as pseudoplasticity help both increase penetration rates under high shear and provide excellent suspending action for optimum hole cleaning under low shear while viscosity is regained.
HEC is normally added at concentrations of 0.5 to 4 lb/bbl (1.43 to 11.4 kg/M3). For maximum effectiveness, slowly add HEC through the hopper while mixing into a neutral-pH fluid for 30 min. This ensures complete hydration and maximum viscosity development.
Typical Specification............
Appearance |
| Off-white free flowing powder |
Mole substitution degree, M.S |
| 1.8 - 2.0 |
Solution viscosity, cps * |
| 4000 |
Moisture content, % max. |
| 10.0 |
pH, 1% solution |
| 6.0 - 8.5 |
Bulk density (kg/M3) |
| 450 - 550 |
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*Measured by Brookfield viscometer, at 25, 1% aqueous solution............ | ||
