Hydro Ethyl Cellulose
	HEC (hydroxyethyl cellulose) is a high-molecular-weight,high-quality, modified, structural polysaccharide. Nonionic,HEC is suited for viscosifying brines.
	 
Advantages :
- Readily dispersible and produces rapid viscosity.
 - Develops high viscosity at moderately low concentrations
 - Does not require high shear and has low tendency to fisheye
 - Polymeric structure readily cleaved by various reagents
 
	Commonly used as a brine viscosifier for completion and workover fluids where suspension (gelation) character is less important, HEC functions in various brines, including calcium, zinc chlorides, bromides, and monovalent analogues.HEC is used for gravel-packing, spacers, and pills. The
	polymer exhibits negligible effects on producing formations, and various chemical agents can break the polymeric structure to facilitate complete removal.
        
    