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


Deva CMS-LV is a Carboxy Methyl Cellulose ( C.M.C.) of low viscosity which adheres to the OCMA DFCP-2 Specifications. It is used as a fluid loss reducer in fresh, sea and saturated salt water based drilling fluids.


Deva CMS-LV is used in various types of drilling fluids ranging from fresh water to saturated salt water. It is particularly used when borehole conditions or excessive reservoir pressures require higher mud weights; thus a low viscosity product is highly recommended for the control of the fluid loss.

In usual conditions Deva CMC-LV has no microbial susceptibility.

Deva CMS-LV can be used in a wide pH range (5-12). The product flows easily from the bags and if carefully added through the hopper, dissolves quickly in the drilling fluid without lumping.


Deva CMS-LV solutions are highly heat resistant. The product has a peak operating temperature higher (300°F- 150°C) than other products such as Carboxy Methyl Starch (CMS) and Guar Gum. In the presence of strong alkali, oxygen & some metail ions, this value is reduced.


Deva CMS-LV meets the OCMA DECP-2 Specifications.

Other Results

Base fluid: sea water, bentonite 63 ppb. (180Kg/m³)

Deva CMC-LV ppb.(Kg/m³) Conc Av Pv Yp Api Filtrate
- - 6.5 3.5 6.0 48.5
2.8 8.0 9.0 8.5 1.0 8.1
3.5 10.0 9.5 9.0 1.0 5.4
4.2 12.0 11.0 10.5 1.0 4.2
4.9 14.0 13.5 12.5 2.0 3.5

Base fluid: Saturated salt water, attapulgite 14ppb. (40 Kg/m³

Deva LV ppb.(Kg/m³) CMC- CONC. Av Pv Yp Api Filtrate
- - 9.5 4.0 11.0 136.0
5.3 15.0 14.0 14.0 1.0 6.6
6.0 17.0 18.5 17.0 2.0 4.9
6.7 19.0 22.0 20.0 4.0 4.2
7.4 21.0 27.5 24.0 6.0 3.8


The amount of DEVA CMC-LV required depends on the type and the characteristics of the drilling fluid. In order to obtain 5-10ml. of fluid loss, typical concentration is as follows.

  ppb. Kg/m³
In fresh water muds 1-3 2.85 – 8.56
In sea water muds 2-5 5.71- 14.27
In saturated salt water muds 4-6 11.41-17.12

The product should be added slowly through a mixing hopper at a rate of 20 min/sk.

Typical Properties

Appearance Whitish free flowing powder
Moisture max.6%
D.S. 0.8-0.9
pH2% solution 9-11

Health and Safety

Detailed information on handling and eventual precautions 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.