Typical Properties, Functions, and Technical Data of Low Viscosity Sodium Carboxymethyl Cellulose (CMC LV)
CMC LV is an anionic, water-soluble polymer derived from natural cellulose. It is mainly used for fluid loss control, wellbore stabilization, and improving filter cake quality. With excellent salt resistance and eco-friendly properties, it is widely applied in oil, gas, and shale drilling fluids.
1.Product Overview
According to API/OCMA standards, CMC LV is characterized by a low viscosity (2% solution, Brookfield). Its primary function is fluid loss control rather than thickening. Its low viscosity, excellent dispersion, and high compatibility make it an essential additive in modern drilling fluids.
2.Main Functions and Technical Advantages
Function |
Description |
Technical Effect |
|
Fluid Loss Control |
Forms a dense, low-permeability filter cake to reduce fluid loss. |
Prevents wellbore collapse and protects reservoirs. |
|
Wellbore Stabilization |
Reduces formation swelling and collapse caused by filtrate invasion. |
Enhances drilling safety. |
|
Thin and Tough Filter Cake |
Produces a thin, tough, and easily removable filter cake. |
Reduces sticking risks. |
|
Excellent Salt Resistance |
Maintains fluid loss control in high-salinity environments. |
Ideal for offshore and high-salinity drilling. |
|
Wide Compatibility |
Compatible with freshwater, seawater, and brine-based mud systems. |
Increases formulation flexibility. |
3, Usage Recommendations
Dissolution: Slowly sprinkle into circulating mud or water while stirring continuously to prevent lumping.
Addition Order: Add during base mud preparation to ensure full dispersion.
Salt Resistance: Use salt-resistant grades for high-salinity drilling fluids.
Combined Application: When combined with PAC LV, it enhances fluid loss control in deep or high-temperature wells.
4,Conclusion
With its low viscosity, high dispersibility, and excellent fluid loss control, CMC LV plays a key role in drilling fluids for oil, gas, and shale formations. Its outstanding salt resistance and environmental adaptability make it a widely used, eco-friendly additive in global drilling operations.
