堵漏剂  
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  降粘剂  
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  Shale Inhibitors

Hydrolyzed Polyacrylonitrile Potassium for Drilling Fluid


General introduction


Hydrolyzed polyacrylonitrile potassium KHPAN is a product of polymerization and hydrolysis of polyacrylonitrile. It has the characteristics of small routine dosage, strong inhibitive ability, high temperature resistance and salinity resistance.


Property index


Fig. 1 chemical and physical property


Items


Appearance


moisture , %


Sreenings , %


Potassium , %


Chloride Cl - content , %


Index


Free flowing powder or particles


≤10.0


≤5.0


≥12.0


≤3.0


Fig.2 drilling fluid property


Items


Index


Fresh water drilling fluid


Salt water drilling fluid


Base mud


A.V. ,mPa.s


≤8.0


≤10.0


F L ,mL


18.0 ~ 25.0


55.0 ~ 65.0


Adding sample


A.V ,mPa.s


≤8.0


≤10.0


F L rate of reduction ,%


≥45.0


≥50.0


Characteristics


1. Apparently inhibitive ability , keep holes clean and regular, reduce pipe sticking.


2. Improve mud cake quality, effectively reduce filtration loss.


3. Have little influence on rheology behaviour.


4. Strong ability of salinity resistance, can be applied in saturated salt water.


5. Good compatibility with other additives and suitable in both non-dispersed and dispersed drilling fluids.


6. The routine dosage is in the range of 0.2-1.0%, the specific amount is up to condition under well.


Notes


This product should be stored in a cool, ventilated place to avoid the sun and rain.


Package


It is packed in composite paper sacks, with net weight 25kg per sa ck.


 


 


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