What is partially hydrolyzed polyacrylamide (PHPA)?

Partially hydrolyzed polyacrylamide (PHPA) is a widely used polymer in the oil and gas industry due to its lesser cost and good water solubility. PHPA is used as a functional additive in water-based drilling fluids. The PHPA mud system stabilizes shale formations and influences cuttings and wellbore stability.

What is partially hydrolyzed polyacrylamide (HPAM)?

Partially hydrolyzed polyacrylamide (HPAM) is a substance widely used for controlling mobility ratios. It interacts with divalent ions in water, such as those found in flooded polymer which has a negative charge, in produced water.

Is PHPA a water soluble polymer?

PHPA 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.

Does hydrolyzed polyacrylamide have a pH dependence?

They discovered that the viscosity of hydrolyzed polyacrylamide exhibits pH dependence as characterized by transition zones (at pH = 3 and pH = 6), where the viscosity suddenly changes. This is because the hydrogen ions adsorb and dissociate from the carboxyl functional groups, a discovery which has significant application potential , .

What is PHPA (powder form)?

PHPA (powder form) is a readily dispersible additive designed to provide cuttings encapsulation and shale stabilization in freshwater to saltwater drilling fluids ranging from low solids to weighted muds.

Which drilling fluid is compatible with PHPA?

It is compatible with most of the drilling fluid products, biopolymers, PAC, CMC. It maintains borehole stability by preventing shale swelling and erosion. PHPA maintains viscosity in solid free drilling fluid. As a Bentonite extender in low solids non-dispersed mud, it can be used along with small addition of Bentonite to suspend weight material.