Xitao Polymer Co., Ltd.
LOCATION: Drilling Mud System(DMA) > Oil well PHPA drilling mud additives(DMA)
Oil well partially-hydrolyzed polyacrylamide(PHPA) drilling mud additives


It’s an anionic partially-hydrolyzed polyacrylamide (PHPA) powder as a functional additive,easy to dissolve in water, used as encapsulating polymer for fresh and saltwater mud.

As a shale-control mud, PHPA is either to control wellbore shales or to extend bentonite clay in a low-solids mud,the main functions of drilling fluids include providing hydrostatic pressure to prevent formation fluids from entering into the well bore, keeping the drill bit cool and clean during drilling, carrying out drill cuttings, and suspending the drill cuttings while drilling is paused and when the drilling assembly is brought in and out of the hole. The drilling fluid used for a particular job is selected to avoid formation damage and to limit corrosion.

Quality specification

AppearanceWhite powder
Screen margin(sieve 0.9mm),%10max.
Molecular weight,MM12min.
Solid content,%90min.
Free monomer,%0.5max.
Hydrolysis degree,%5-30
Water soluble time,hr1max.

Mud property

Base mudBase mud+0.2% sample
Apparent viscosity,mPa.s5±118min.
Fluid loss,ml22±225max.


It’s mainly used as a viscosifier of encapsulator of water-based drilling fluid system,it’s applicable in freshwater,seawater,saturated saltwater mud systems, providing cuttings encapsulation,shale filming/inhibition,flocculation of drilled solids

Method of dosage

It could be added into drilling fluid directly,but preferably under a prepared water solution of 1% to 2% concentration.The suggested dosage is 0.5% to 1%.


Xitao Polymer Co. Ltd.
Email: river@xitao.com
Mobile/what’s app:+86-13911651774
New plant: Yankougang Polymer Area, Rudong,Jiangsu,China
Plant add: Hou Wanggezhuang,Mulin,Shunyi, Beijing, 101309,China
Office add: 10H Oriental Kenzo Office Building, No. 48 Dongzhimenwai Dajie, Dongcheng Dist., Beijing, 100027,China