Chrome- Free Lignosulfonate
Chrome-free lignosulfonate is a drilling mud thinner produced by
multi chemical reactions followed by drying of natural high molecular
weight compound, organic material and harmless metal ions. The product
contains no Chromium heavy metal and is ideal for use in drilling
at densely populated area and offshore.
1. Thinning Performance
Test results indicate the thinning performance in fresh water based
mud under normal temperature is comparable to Ferrochrome Lignosulfonate
(FCLS). At elevated temperature, it performs better than FCLS in
either fresh water or salt-water based mud, particularly the later.
The product is suitable for use in drilling under complex geological
formation, in water with high TDS, or in offshore drilling.
| Water content %
Insoluble alkaline material %
Total Fe %
Total CaSO4 %
PH of 2% water solution (W/V)
2.0 - 4.0
2. Good Fluid Loss Control Properties
Its major advantage is the thinning effect in drilling mud with
high solid content, and simultaneously controls the fluid loss.
Its fluid loss control action is better than FCLS and the mud cake
formed is smooth and compressible, thus beneficial for well bore
protection and fluid loss reduction under high-pressure condition.
3. Higher Retention of Solid
The product has improved solid retaining capacity due to its excellent
thinning properties. Even when the mud is mixed with large quantity
of clay while drilling, the rock scarps can still maintain good
mobility. In addition it is capable of withstanding contamination
by calcium, magnesium and sodium electrolytes, making it an ideal
thinning agent for heavy weight mud.
4. Recommended Dosage
For salt water and fresh water based mud, a range of 0.5 to 1.0%
is recommended depending on the specific conditions. Under special
situations such as high solid and metal electrolytes content, a
slight increase in dosage is recommended but not to exceed 2.0%.
It is packed in 25 kg net weight moisture proof multi-wall paper
bags, with PE film inside. Other size packing is also available
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