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


Deva CMC-HV is an high viscosity Carboxy Methyl Cellulose (C.M.C.) technical graded. It is used as a viscosifier and fluid loss reducing agent in different types of water based drilling fluids.


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

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


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

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


The amount of Deva CMC-HV required depends on the type and the characteristics of the drilling fluid. Typical additions are the following:

  ppb. Kg/m³
In fresh water muds 1.53 -3.0 4.28-8.56
In sea water muds 2.0 -3.5 5.71-10.00
In saturated salt water muds 2.0 -4.0 5.71-11.42

Typical Properties

Appearance Whitish free flowing powder
Moisture Max. 8%
D.S. 0.8-0.9
pH2% solution 9-11
Hoeppler viscosity 2%sol. 60.80 cP
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.
Gross weight : 1.020 Kg.
Approx. cubage : 1.3 m³
Optional extra : Heavy duty cardboard box- jungle box.
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.