Carboxy Methyl Cellulose (EHV) - Deva CMC (EHV)


DEVA CMC-EHV is an extremely high viscosity Carboxy Methyl Cellulose (C.M.C) technical graded which adeheres to the OCMA dFCP-7 Specifications. It is used as a viscosifier and fluid loss reducing agent in different types of water based drilling fluids.


DEVA CMC-EHV is used in various types of drilling fluids ranging from fresh water to saturated salt water.

DEVA CMC-EHV can be used to substitute part of the bentonite in order to keep the solids content low. Furthermore, DEVA CMC-EHV allows rheology control, filtration control, formation of thin filter cakes, protection from flocculation, lubrication of bits, suspension of cuttings and weighting materials.


DEVA CMC-EHV solutions are highly heat resistant. The product has a peak operating temperature higher (300°F, 150°C) than other products such as Starch and Guar Gum.

In the presence of strong alkaly and some metal ions this value is reduced.


DEVA CMC-EHV meets the OCMA DFCP-7 Specifications.


The amount of Deva CMC-EHV required depends on the type and the characteristics of the drilling fluid.

  ppb. Kg/m³
In fresh water muds 1.0 -2.0 2.85-5.71
In sea water muds 1.5 -3.0 4.28-8.56
In saturated salt water muds 1.5 -3.0 4.28-8.56

Typical Properties

Appearance whitish free flowing powder
Moisture max. 6%
D.S. 0.8-0.9
pH2% solution 9-11
Toxicity non toxic

Health and Safety

Detailed information on handling and eventual precaution to be observed in the use of the product can be found in our relevant health and safety Information sheet.


Multiply export paper bags, with internal p.e. coating.
25 X Kg. X 40 bags per non-returnable pallet, wrapped and strapped.
Customers are urged to ensure that the products are entirely suitable for their own purposes. Deva Drill Tech can frequently help in these technical matters, if required.