Product Description
Chrome-free lignosulfonate is a thinner and fluid-loss control agent for water-based drilling muds. It resists high temperature (up to 150 °C per TDS) and electrolyte contamination, is compatible with other mud additives and is used as an alternative to chrome-based lignosulfonate thinners.
Specification
| Parameter | Typical value (GAC-CFLS TDS) |
|---|---|
| Appearance | Brown powder |
| Water-insoluble matter | 2.5% max |
| Moisture | 8.5% max |
| pH (2% solution) | 2.8 – 3.8 |
Mud Performance
| Test | Fresh water mud | Salt water mud |
|---|---|---|
| Normal temperature: apparent viscosity / viscosity reduction | ≤ 20 mPa·s / ≥ 85% | ≤ 25 mPa·s / ≥ 65% |
| High temperature: apparent viscosity / viscosity reduction | ≤ 35 mPa·s / ≥ 60% | ≤ 45 mPa·s / ≥ 45% |
Application
- Add to the drilling fluid as solution or powder; adjust mud pH to 10.0 – 10.5.
- Supplier-recommended starting trial levels: 1.0% (w/v) in fresh water mud, 2.0% (w/v) in salt water mud.
- Performance in fresh water mud is higher than in salt water mud.
Why Chrome-Free?
Chrome lignosulfonates contain chromium; many operators and regulators restrict chromium in drilling fluids and cuttings discharge. A chrome-free thinner avoids that issue. Check the discharge rules for your field.
Packing, Storage and Handling
- 25 kg bags: PE film inner liner with paper-plastic composite outer bag.
- Keep away from water, moisture and heat; store dry and ventilated.
- Weakly acidic product: avoid package breakage and wear protective clothing.
- Shelf life 24 months in unopened packaging.
Related: chrome-free lignosulfonate technical page.
Frequently Asked Questions
What is chrome-free lignosulfonate?
A chromium-free lignosulfonate thinner and fluid-loss control agent for water-based drilling muds.
What dosage is used?
Supplier-recommended starting trial levels: 1.0% (w/v) in fresh water mud and 2.0% (w/v) in salt water mud, with mud pH 10.0 – 10.5.
What temperature can it handle?
Up to 150 °C according to the TDS.