Carboxymethyl Hydroxyethyl Cellulose (CMHEC) Fluid Loss Additive
CMHEC (Carboxymethyl Hydroxyethyl Cellulose) is a dual-substituted cellulose ether used as a fluid loss control agent in cement slurries, drilling fluids, and completion fluids. It provides excellent filtration control under both static and dynamic conditions and at temperatures up to 150°C. CMHEC is particularly valued for its ability to provide simultaneous fluid loss control and mild viscosification in cement slurries without excessive retardation.
Technical Specifications
| appearance | White to off-white powder |
| degree of CM substitution | 0.20–0.35 |
| degree of HE substitution | 0.85–1.20 |
| API fluid loss in cement (mL/30 min) | ≤50 |
| viscosity of 2% solution (mPa·s, 25°C) | ≥50 |
Applications
- Oil well cement slurry fluid loss control
- Water-based drilling fluid filtration reduction
- Completion brine fluid loss control
- Horizontal well cementing fluid loss prevention
- Gravel pack and sand control fluid loss
Key Features
- Effective fluid loss control in cement slurries up to 150°C
- Dual substitution provides salt tolerance and high temperature stability
- Minimal retardation effect on cement set time
- Compatible with all standard cement additives
Send Inquiry
More in Oilfield Chemicals
Alkaline-Surfactant-Polymer (ASP) Flooding System
Ammonium Bisulfite Oxygen Scavenger for Drilling Fluids
10192-30-0
Ammonium Persulfate Fracturing Fluid Gel Breaker
7727-54-0
Asphaltene Inhibitor Dispersant
Barite Weighting Agent for Drilling Fluids
13462-86-7
Borate Crosslinker for Fracturing Fluids
Calcium Chloride Cement Accelerator
10043-52-4
Citric Acid Iron Control Agent
77-92-9