Partially Hydrolyzed Polyacrylamide | Petra Phpa

Partially Hydrolyzed Polyacrylamide

Partially Hydrolyzed Polyacrylamide



Partially Hydrolyzed Polyacrylamide OVERVIEW

Partially Hydrolyzed Polyacrylamide PETRA PHPA is a co-polymer with a high molecular weight and anionic nature. It is a water-soluble polymer that is predominantly utilized in fresh water, calcium, sodium brines, and KCL mud systems as a very effective fluid loss reduction, viscosities, and protective colloid for shale's and cutting. The majority of drilling fluid products, biopolymers, PAC, and CMC are compatible with it. By preventing shale erosion and swelling, it preserves borehole stability.

Application of Partially Hydrolyzed Polyacrylamide

PHPA keeps solid-free drilling fluid viscous. It can be used in conjunction with a little amount of Bentonite as a Bentonite extender in low solids, non-dispersed mud to suspend heavy materials.

Partially Hydrolyzed Polyacrylamide Advantage

It acts as an inhibitor by covering or encasing cuts and formation.

Additionally, it limits the interaction between shale that is water soluble and dispersible.

It can be utilized in clear water drilling as a flocculent.

Additionally, it offers freshwater, seawater, and calcium ion-containing water inhibitory characteristics.

The drilling fluid's high viscosity aids in more effective cuttings removal from the borehole.

It is resistant to fermentation caused by bacteria.

Partially Hydrolyzed Polyacrylamide Physical Properties

Properties Values
Physical Appearance Viscous Milky Liquid
PH (1% Solution) 6 - 8
Character Anionic
Density 0.98 - 1.05
% NVS 33 - 40 %
Brookfield Viscosity (cps) 500-2000

Partially Hydrolyzed Polyacrylamide Safety and Handling

Wearing protective gear and taking the safety measures listed in the MSDS are required when handling HPA as an industrial chemical.

Partially Hydrolyzed Polyacrylamide Packaging

Both styles of packaging are available for PETRA PHPA Partially Hydrolyzed Polyacrylamide.


On request, private labeling, specialized packaging, and labeling are also offered.

Please contact us at for further information on PHPA L, and PHPA P, as well as information on performance and case studies.


Flocculation is a chemical process used extensively in the drilling fluids industry. Flocculation describes the formation of particle associations in a suspension.

This particle association can alter suspension characteristics of a fluid or separate solids from a liquid phase medium. In flocculated gel systems flocculation alter the fluid properties. Properties affected include an increase in funnel viscosity, yield point and gel strengths, as well as an increase in fluid loss. As flocculation occurs it creates a structural modification to the clay (bentonitic) particles in the fluid. By aggregating the clay particles they become more structured, thus increasing the resistance to flow. One way to impart a large degree of flocculation on a gel based system is by increasing the pH of the system to values greater than 10.

The mechanism for this high degree of flocculation may be hydroxide bridging between positively charged edges of clay platelets. In flocculated clear water systems flocculation is used to separate solid from a liquid phase, maintaining clear water as the drilling fluid. With the introduction of a cation, usually calcium, as a link between clay particles and an anionic polymer, a floc is formed. As the drilled solids form flocs with the cation and polymer, the floc becomes large enough in size to fall out of suspension in the water at surface and leave the drilling water clear. It is crucial to run pilot tests on location and pay close attention to the flocculation process. If the wrong flocculant or concentration of flocculant is used it cause serious problems. In particular flocculation would occur not in the mud tanks, sump or floc tank as required, but rather in the wellbore annulus having a serious affect on drilling the well.

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