Product Description
Polylube 8 is a high-performance lubricity additive engineered for water-based drilling fluids (WBM), designed to significantly reduce torque and drag and improve drilling efficiency across all water-based systems.
Polylube 8 delivers consistent friction reduction and demonstrated temperature stability across a wide range of operating conditions. Its diesel-free formulation makes it well suited for offshore operations where environmental compliance, safety, and fluid performance are critical.
- Excellent Lubricity Performance: Demonstrated coefficient of friction reduction of up to 65–70% vs. base mud systems, reducing torque and drag to improve ROP, reduce mechanical wear, and extend tool life.
- Proven Brine Compatibility: Demonstrates excellent compatibility in freshwater and sodium chloride brines up to approximately 8.6 ppg across treat rates from 0.5–5 vol%.
- Diesel-Free Formulation: Higher flash point than diesel-based additives, supporting safer handling and offshore environmental compliance.
- Thermal Stability: Retains full performance after extended high-temperature aging, suitable for HPHT wells and deepwater extended reach drilling.
Applications
Extended Reach Wells
Horizontal and Directional Drilling
High-Density Drilling Fluids
Saltwater and Moderate-Density NaCl Brine Mud Systems (up to approximately 8.6 ppg NaCl density)
Benefits
Excellent Lubricity Performance
Demonstrated coefficient of friction reduction of up to 65–70% vs. base mud systems, significantly reducing torque and drag to improve ROP, reduce mechanical wear, and extend tool life.
Proven Brine Results
Demonstrates excellent compatibility in freshwater and sodium chloride brines up to approximately 8.6 ppg across treat rates from 0.5–5 vol%. In higher salinity systems, treat rate optimization may be required to maintain dispersion stability. Compatibility testing should be performed prior to use in brines exceeding 8.8 ppg NaCl density.
Diesel-Free Offshore Advantage
Diesel-free formulation with a higher flash point (~285°F) than diesel-based additives
Thermal Stability
Retains full performance after extended high-temperature aging, making it suitable for HPHT wells and deepwater extended reach drilling.
Rheology Neutral
Minimal impact on plastic viscosity, yield point, and gel strengths, maintaining hole cleaning efficiency, ECD control, and hydraulic performance.
Versatile Compatibility
Effective in freshwater, seawater, and moderate-density sodium chloride brine systems. Recommended for water-based muds up to approximately 8.6 ppg NaCl equivalent salinity. Laboratory compatibility testing is recommended for higher-density monovalent brines and saturated salt systems.
Cost Advantage vs. Diesel
Delivers competitive pricing relative to diesel-based lubricants while eliminating the compliance costs, environmental liability, and safety risks associated with hydrocarbon additives in offshore and sensitive drilling environments.
Product Availability
55-Gallon Drums
275-Gallon Totes
Bulk Quantities
Brine Compatibility
| System | Compatibility |
| Fresh Water | Excellent |
| Seawater | Excellent |
| NaCl Brine ≤ 8.6 ppg | Excellent |
| NaCl Brine 8.8 ppg | Good at ≤ 2 vol%; dispersion may occur above 3 vol% |
Product Data
| Property | Test Method | Typical Value |
| Flash Point | ASTM D93 | ~285°F |
| pH | N/A | ~4.3 |
| Moisture | N/A | < 0.2 wt% |
| Diesel Content | N/A | None |
Compatibility Screening (Visual)
| System | Result |
| Freshwater | Pass |
| NaCl Brine ≤ 8.6 ppg | Pass |
| NaCl Brine 8.8 ppg | Pass to 2 vol%; dispersion above 3 vol% |
| NaCl Brine 9.0 ppg | Pass to 1 vol%; precipitation above 2 vol% |
| Recommended Brine Density Range | Freshwater to 8.6 ppg NaCl |
Looking for CHEM Group’s newest lubricity technology?
Polylube 8 is our proven, lab-validated lubricity additive with an established track record across water-based drilling fluid systems. For a newer formulation with a significantly higher flash point (425°F vs. Polylube 8’s ~285°F), see our Polylube 9B product page.