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PHPA Polymer Powder High Molecular Weight
Type: Anionic Polyacrylamide

PHPA Polymer

Shale Stabilizer & Encapsulator (Drilling Grade)

Partially Hydrolyzed Polyacrylamide (PHPA) is a water-soluble polymer used as a premium additive in water-based drilling fluids. It acts as a shale inhibitor by "encapsulating" (coating) clay and shale cuttings, preventing them from swelling, dispersing, or disintegrating in the borehole.

Appearance White Granular Powder
Ionic Charge Anionic
Molecular Weight High (> 15 Million)

Product Overview

PHPA is the industry standard for stabilizing reactive shale formations. When drilling through clay, the clay tends to absorb water, swell, and stick to the drill bit ("Bit Balling"). PHPA solves this by coating the clay and making it non-reactive.

  • Viscosifier: Increases the viscosity of fresh water and brine muds to help carry cuttings to the surface.
  • Friction Reducer: Acts as a lubricant, reducing torque and drag on the drill string.
  • Flocculant: Helps settle solids in the mud pit, keeping the recycled mud clean.

Technical Specifications

High Performance Drilling Grade.

Parameter Specification Limit
Appearance White Free Flowing Granules
Solid Content 88% Min
Degree of Hydrolysis 25% - 30% (Anionic Charge)
UL Viscosity 6.0 - 7.5 cps
pH (0.5% Solution) 7.0 - 9.0
Dissolving Time Max 60 Minutes
Insoluble Matter Max 0.2%
Mesh Size 20 - 80 Mesh

Mechanism: The Encapsulation Effect

How does it stop Shale from swelling?

Shale is like a sponge; it drinks water and expands. PHPA stops this via "Encapsulation."

  • Adsorption: The negative (anionic) groups of PHPA attach to the positive edges of clay particles.
  • The Wrap: The long polymer chains wrap around the drill cuttings like a plastic film (Encapsulation). This protective layer prevents water from entering the clay structure, keeping the borehole walls stable and intact.

Pro-Tip: Avoiding "Fish Eyes"

Mixing is Key

PHPA loves water too much! If you dump the powder too fast, it forms sticky lumps called "Fish Eyes" (dry powder inside, gel outside) that act like rubber balls and block screens.
Solution: Always use a high-shear hopper. Add the powder slowly into the vortex of moving water. Allow 30-60 minutes for full hydration before pumping downhole.

Industrial Applications

Oil & Gas Drilling

Primary shale stabilizer in freshwater and saltwater mud systems. Reduces bit balling.

Piling & Construction

Used in polymer slurries for bored piles and diaphragm walls to support the trench.

Tunneling

Soil conditioning agent for Tunnel Boring Machines (TBM) to make soil removal easier.

Water Well Drilling

Increases viscosity to lift cuttings in low-pressure water wells.

EOR (Enhanced Oil Recovery)

Used in polymer flooding to push residual oil out of reservoirs.

Water Treatment

Acts as a flocculant to settle suspended solids in wastewater treatment.

Packaging Options

25 KG Kraft Paper Bags

Multi-layer paper bags with inner PE liner to prevent moisture absorption.

750 KG / 1 MT Jumbo Bags

Bulk packing for large rig sites. Palletized and shrink-wrapped.

Request a Quote for
PHPA Polymer

High Molecular Weight. Shale Stabilizer. Direct from Factory.

Minimum Order Quantity: 1 MT
Samples Available for Mud Lab Testing

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