PHPA--Partially Hydrolyzed Polyacrylamide-anionic polyacrylamide
Partially Hydrolyzed PolyAcrylamide-PHPA is an encapsulating
polymer that is normally used in conjunction with potassium
chloride to provide a high degree of shale inhibition. The polymer
is anionic, attaches itself to the positively charged edges of clay
platelets, thus binding the particles together. It can inhibit
cuttings dispersion to make solids removing easily and effectively.
The adsorbed polymer also lowers the speed of water penetration
into shale. Thus improving well bore stability. Partially
Hydraulised PolyAcrylamide-PHPA is not adversely affected by common
contaminants. However, simultaneous high-temperature/high-PH
conditions should be avoided, as polymer hydrolysis can release
traces of ammonia gas. Partially Hydraulised PolyAcrylamide-PHPA is
added as a treatment for the cuttings and the sides of the well
bore, and should be added on a regular basis while drilling shale
It is a co-polymer of anionic character and high molecular weight.
It is a water-soluble polymer, which is primarily used as a highly
efficient fluid loss reducer, viscosifier and protective colloid
for shale’s and cutting in fresh water, calcium, sodium brines and
KCL mud systems. It is compatible with most of the drilling fluid
products, biopolymers, PAC, CMC etc. It maintains hole stability by
preventing shale swelling and erosion.
The PHPA has been used successfully for over 20 years to stabilize
sloughing shales in fresh, KCl and salt water based drilling
fluids. The PHPA offers a high activity product in a low viscosity,
easy to handle product.
It functions as an inhibitor by coating or encapsulating formation
It also restricts the interaction of water hydratable &
It can be used as a flocculent in clear water drilling.
It also provides inhibition properties to fresh water, sea water
and also in presence of calcium ions.
High viscosity of this drilling fluid helps in better removal of
cuttings from bore hole.
Better shell stabilization prevents water loss through cracks and
white little grain
Hydrolyte matter, mol%
Filter factor ≤
Viscosity, mpa. s ≥
Dissolve speed, min ≤
Rudimental polyacrylamide content,%≤
Granularity (0.1mm-1.4mm) % ≥
Material is packed in 25kg or 50 Lbs (22.68 Kg) sacks. Private
Labeling and customized packaging is also available on request