JN-A is a new type of drilling fluid thinner made from the vegetable tannin extract by chemical graft modifications. JN-A has a excellent thinning effect in many kinds of water base drilling muds, especially the ability to control the viscosity of the high clay solids content mud system when drilling through the clay shale stratum. The so called“ inhibitive drilling fluid system”composed of JN-A and silicone material has achieved great success in many oil fields.

Recommended

Normal treatment in water base or potassium base muds as  the thinner is about 0.2~1%;