Table of Contents

• Procurement Risks in PAC Sourcing
• What Makes PAC Essential
• Our PAC Grades and Key Features
• Detailed Specifications
• Real-World Applications
• Mixing and Usage Insights
• Global Shipping and Lead Times
• Our Manufacturing Capabilities
• What Buyers Say
• Frequently Asked Questions

Why PAC Procurement Can Trip Up Even Seasoned Buyers

I've handled dozens of PAC orders for U.S. drilling outfits over the years. One common headache? Suppliers who cut corners on purity, leaving you with fluids that shear too fast under downhole pressure. Or worse, inconsistent viscosity that messes up your mud program from the start.

Procurement directors tell me they lose weeks chasing samples that don't match specs. Lead times stretch because factories overload lines with lower-grade fillers. And customs holds? Forget it if paperwork lists the wrong HS code—polyanionic cellulose falls under 39123100, but mix it up and you're repacking containers.

Another pitfall: overlooking regional regs. U.S. ops demand low-residue PAC to avoid formation damage. If your supplier's from a non-oilfield hub, they might prioritize pharma grades over drilling viscosifiers. We've seen importers pay 20-30% premiums restocking after failures.

Short story: Vet your source early. Check for API-tested batches and export history to North America. That's where we shine—direct from Hebei, with proven U.S. deliveries.

Polyanionic Cellulose: The Workhorse of Modern Drilling Fluids

As an export manager at Tang Zhi Technology, I've shipped PAC to rigs from Texas to the North Sea. Polyanionic cellulose isn't just another thickener—it's engineered cellulose ether that hits multiple roles in one powder: viscosity builder, fluid loss controller, and shale stabilizer.

Chemically, it's carboxymethyl cellulose with high anionic charge density. That means superior hydration in brines, even high-salinity muds up to 20,000 ppm chlorides. No clumping like some natively modified gums.

In the field, PAC keeps LCM suspensions stable without excessive sag. Operators lean on it for sweeps and pills where HEC falls short on temp tolerance—up to 250°F for our HV grades.

But it's not magic. PAC needs proper shearing to activate fully. Skip the high-speed mixer, and you'll fight fish eyes all shift. We've tuned our production for instant dispersibility, cutting prep time on location.

Market-wise, demand spiked with shale plays. U.S. importers seek consistent supply amid spot shortages. Our 40,000-ton annual capacity handles that, with dedicated PAC lines separate from HPMC or CMC runs to avoid cross-contam.

Production starts with wood pulp alkalization, etherification under pressure. We control DS (degree of substitution) precisely—0.9 max for drilling PAC—to balance rheology without over-thickening. Post-neutralization, drying at low temps preserves polymer chain integrity. No harsh grinding that degrades performance.

Buyers appreciate our focus on API specs. Regular 13A tests confirm LTLVP under 15ml/30min. That's table stakes for Permian ops.

One more thing: Cost per barrel matters. Our bulk PAC delivers at $2.5-3.5/kg FOB, factoring into mud costs that beat synthetic polymers for volume work.

This sets the stage—now let's drill into our offerings.

PAC Grades Tailored for Your Mud Program

We offer three core grades: Regular (LV-PAC), High Viscosity (HV-PAC), and Filtration Control (FC-PAC). Each hits specific needs without overlap waste.

• LV-PAC: Low viscosity for fresh/saltwater systems. Builds flat rheology gels fast—ideal for high-temp wells.
• HV-PAC: Thicker profiles for sweeps and lost circulation. Temp stable to 300°F with xanthan blends.
• FC-PAC: Pure loss reducer, minimal yield point impact. Drops HTHP to 10ml at 2 lb/bbl.

Advantages over competitors? Tighter batch specs (±5% viscosity variance vs. 15-20% from some mills). Plus, food-grade options for extended casing strings where OSHA flags contaminants.

Procurement note: Mix grades for custom profiles. We've helped teams optimize 40% cheaper than pre-blends.

Our automated reactors ensure uniform etherification.

Technical Specifications Table

polyanionic cellulose manufacturer cellulose polymer cellulose polymerisation

All grades API 13A/13B compliant. Custom DS on request.

Key Applications in Oil & Gas and Beyond

PAC shines in water-based muds for conventional and unconventional plays. Permian drillers use LV for low-solids systems; Marcellus teams blend HV with PHPA for shale inhibition.

Offshore? FC-PAC cuts losses in narrow margins. We've supplied Gulf ops where it outperformed starch at HPHT.

• Drilling fluids viscosifier
• Workover/completion pills
• Fracturing fluid thickener
• Cement slurries
• Pharma suspending agent (food-grade)

Non-oil uses: Ceramics for green strength, textiles as warp sizing. But 80% of our export goes to fields.

Field Mixing Guidelines and Best Practices

Don't just dump it in—prehydrate in makeup water at 1-4 lb/bbl. Shear with venturi or hammermill. Full yield in 30 mins at 80°F.

Warning: Cold brine slows dispersion. Warm to 100°F first. Overdose gels static muds—test PV/YP on Fann first.

Maintenance: Low residuals mean less filter cake issues. Biocide if storing sweeps.

Contractors report 20-25% faster mixing vs. imports with fines.

Export Logistics to USA and Global Markets

From Jinzhou, Hebei: 20' FCL holds 16MT PAC. Qingdao port, 7-10 day transit to Houston/Galveston.

Lead time: 15-25 days post-PO. Samples ship DHL in 3 days.

Pricing FOB/CIF. HS 39123100. Compliant with USITC, no REACH hassles.

We handle consolidations for LCL under 5MT. Track via container #.

Ready for quote? Get your shipping plan.

Tang Zhi Technology: 140,000 sqm Production Powerhouse

Our Jinzhou facility—90,000 sqm buildings, automated lines for cellulose ethers. Annual 40k tons across PAC, HPMC, CMC, RDP.

ISO 9001, REACH registered. Dedicated clean rooms for pharma/food PAC.

Export to 50+ countries, strong U.S. track record.

Feedback from U.S. and International Buyers

John M., Texas Drilling Co.
"Tang Zhi's HV-PAC held rheology through 14 ppg KCl mud at 220°F. No shear degradation mid-hole. Switched fully after first trial."

Maria L., Gulf Platform
"FC grade cut our losses 40% vs. previous supplier. Consistent batches, quick samples. Reliable for urgent workovers."

Raj P., India Importer
"Bulk PAC arrived uniform, no moisture issues post-transit. Pricing beat locals by 15%. Repeat orders locked."

PAC Buyer FAQs

What's the min order for PAC?

1MT trial, full FCL preferred. Flexible for samples.

API testing included?

Yes, each batch 13A/13B report with shipment.

OEM/ODM available?

Custom grades, private label. Discuss DS, purity.

Shelf life and storage?

2 years dry. Keep under 40°C, low humidity.

Compatible with salt muds?

Full hydration in NaCl/KCl up to sat. brines.

Next Step for Your PAC Needs

Chat with our engineer. Free sample, factory price quote, or OEM consult.

Room 2308, Dongsheng Plaza 2, No. 508 Zhongshan East Road, Chang’an District, Shijiazhuang, Hebei, China