Introduction
CMC-LV is a technical-grade low-viscosity sodium carboxymethyl cellulose used to reduce filtration in fresh water and seawater mud systems up to 250°F. It is less effective in brines and saltwater and is not generally recommended to be used if the salinity exceed 50,000 ppm. CMC-L is used in high-viscosity, high solids or heavily weighted fluids and produces only slight increases in viscosity. Subject to bacterial degradation, a biocide should be used to prevent fermentation. CMC-L treated systems should be pretreated with either sodium bicarbonate or possibly citric acid prior to drilling cement.
Applications/Functions
Control filtration rates with minimal viscosity increase in freshwater and seawater mud systems
Deflocculate some seawater muds when used in low concentrations
Advantages
Temperatures stable up to 250°F
Widely available and an economic source of polymer fluid-loss control
Concentrated chemical, very effective at small treatment levels
Typical Properties
Appearance | White powder |
Specific gravity | 1.59 |
pH (5% aqueous solution) | 9-11 |
Recommended Treatment
Freshwater: 0.5-1.5 ppb
Seawater: 2-3 ppb
Add slowly through a mixing hopper at a rate of 10-20 min/sack
Package
25 KG SACK
