| Product Properties | |||
|---|---|---|---|
| Constitution: | High Molecular Weight Poly-anionic Cellulose Polymer | ||
| Appearance: | White Powder | Delayed Solubility: | No |
| Substitution degree: | Standard etherification | Ionicity: | Ionic |
| Product Specification | |
|---|---|
| Moisture: | ≤10% |
| pH(1% solution): | 6.5-8.0 |
| Particle Size: | <125µm: min 90.0 % |
| Particle Size: | <100µm: min 70.0 % |
| Viscosity: | ≥50 mPa·s |
| Fluid loss: | ≤18 mL |
| Referential Data | |
|---|---|
| Active substance(dry basis): | >95.0 % |
| Bulk Density: | 500kg/m³ – 800kg/m³ |
| Degree of Substitution: | ≥0.9 |
Celotech’s PAC HV (High-Viscosity Poly-Anionic Cellulose) is a premium rheology and filtration control additive tailored for demanding drilling environments. It delivers outstanding thermal stability, effective fluid loss reduction, and enhanced performance in deepwater, high-pressure high-temperature (HPHT), and extended-reach drilling (ERD) operations:
HPHT Stability – Maintains stable viscosity up to 175°C (347°F) and 25,000 psi (lab-tested)
Extended-Reach Drilling – Improves cuttings transport in high-angle and ERD wells
API Fluid Loss Control – Reduces HPHT fluid loss to <12 ml as per API RP 13B
Shale Compatibility – Minimizes wellbore instability in water-sensitive formations through reduced filtrate invasion
Celopac® HV is a premium-grade high-viscosity polyanionic cellulose (PAC-HV) designed to deliver superior performance in demanding oilfield drilling conditions, particularly in deepwater and HPHT (High Pressure High Temperature) environments. It serves as a dual-function additive—providing both rheology control and filtration loss reduction—while maintaining exceptional stability in saline and high-temperature systems.
Deepwater drilling fluids requiring high viscosity and salt tolerance
HPHT wells with high bottomhole temperatures and pressures
Water-based drilling systems (freshwater, seawater, and brine)
Completion and workover fluids needing enhanced suspension
Low-solids or clear brine systems requiring rheology build-up and fluid loss control
For operators drilling in complex offshore, deepwater, or HPHT environments, Celopac® HV provides a robust solution to ensure fluid stability, borehole integrity, and optimal drilling performance. Its high-viscosity and thermal resistance properties make it a top-tier choice for fluid engineers facing today’s toughest well conditions.
Celopac® HV is a high-performance high-viscosity polyanionic cellulose (PAC-HV) specifically developed for use in challenging drilling operations such as Extended-Reach Drilling (ERD). With excellent rheological properties, superior filtration control, and high salt tolerance, it plays a critical role in ensuring the stability and efficiency of water-based drilling fluids over long horizontal distances and complex well trajectories.
Extended-Reach Drilling (ERD) operations
High-angle and horizontal wellbore drilling
Water-based muds (freshwater, seawater, brine systems)
Torque and drag mitigation through improved fluid rheology
Shale and reactive formation stabilization
In extended-reach drilling, fluid performance is mission-critical. Celopac® HV offers the reliable viscosity, filtration control, and salt resistance needed to maximize drilling efficiency while minimizing risks. Its contribution to wellbore stability, hole cleaning, and downhole protection makes it an indispensable additive for ERD success.
