Description
Anionic Polymer · Water-Soluble Cellulose Ether
Carboxy Methyl Cellulose – CMC Regular Grade (RG)
Versatile, water-soluble anionic polymer derived from natural cellulose. Widely used as a viscosifier and fluid loss control agent in water-based drilling muds. Provides excellent rheological properties and helps maintain wellbore stability across a wide range of drilling conditions. Its compatibility with most mud systems and its cost-effectiveness make CMC RG a staple additive in the oil & gas drilling industry.
Product Overview
Carboxy Methyl Cellulose (CMC) Regular Grade is a versatile, water-soluble anionic polymer derived from natural cellulose. It is widely used as a viscosifier and fluid loss control agent in water-based drilling muds. CMC RG provides excellent rheological properties and helps maintain wellbore stability across a wide range of drilling conditions. Its compatibility with most mud systems and its cost-effectiveness make CMC RG a staple additive in the oil & gas drilling industry.
Technical Specifications
| Parameter | Value |
|---|---|
| Appearance | White to Cream Powder |
| Degree of Substitution (DS) | 0.65 – 0.85 |
| Viscosity (2% solution, 25°C) | ≥ 200 mPa·s |
| Moisture Content | ≤ 10% |
| pH (1% solution) | 6.5 – 8.5 |
| Purity | ≥ 85% |
| Particle Size | 95% pass through 100 mesh |
| Solubility | Soluble in hot and cold water |
Applications
Oil & Gas Drilling
Fluid loss control and viscosity building in water-based muds
Freshwater Mud Systems
Primary viscosifier and filtration control agent
Cement Slurries
Fluid loss additive in cementing operations
Workover Fluids
Controls fluid loss during well intervention
Paper & Textile Industry
Used as a thickener and binder
Safety Information
Handling Precautions
- Avoid inhalation of dust during handling
- Use appropriate PPE — dust mask, safety goggles, and gloves
- Keep away from open flames and ignition sources
Storage Conditions
- Store in a cool, dry, and well-ventilated area
- Keep away from moisture and direct sunlight
- Recommended storage temperature: Below 40°C
- Shelf Life: 2 years from date of manufacture when stored properly
First Aid Measures
- Eyes: Flush immediately with plenty of water for 15 minutes
- Skin: Wash thoroughly with soap and water
- Inhalation: Move to fresh air immediately; seek medical attention if irritation persists
- Ingestion: Do not induce vomiting; seek immediate medical attention
✔ Non-toxic
✔ Biodegradable
✔ Not classified as hazardous under GHS
✔ Biodegradable
✔ Not classified as hazardous under GHS
Frequently Asked Questions (FAQs)
Q1. What is the difference between CMC and PAC?
CMC (Carboxy Methyl Cellulose) has a lower degree of substitution compared to PAC (Poly Anionic Cellulose), making PAC more salt-tolerant and temperature-stable. CMC RG is preferred for freshwater mud systems, while PAC is better suited for saline and high-temperature environments.
Q2. Can CMC RG be used in saltwater drilling fluids?
CMC RG has limited performance in high-salinity systems. For salt-saturated or brine-based muds, PAC grades are recommended instead.
Q3. What is the recommended dosage of CMC RG?
Typical dosage ranges from 0.5 to 3.0 lb/bbl depending on the mud system requirements and desired viscosity and fluid loss control levels.
Q4. Is CMC RG suitable for high-temperature wells?
CMC RG is effective at temperatures up to 120°C (250°F). For higher temperature applications, PAC or other thermally stable polymers are recommended.
Q5. How should CMC RG be added to drilling mud?
Add CMC RG slowly under continuous mechanical agitation to ensure proper hydration and prevent clumping.
Q6. Is CMC RG food-grade or pharmaceutical-grade available?
The grade described here is industrial/drilling grade. Food-grade and pharmaceutical-grade CMC are available separately and are manufactured under different quality standards.
Q7. What is the shelf life of CMC RG?
CMC RG has a shelf life of 2 years when stored in original sealed packaging in a cool, dry environment away from direct sunlight and moisture.
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