Physical and chemical properties of the liquid product is colorless transparent liquid, saturated solution of specific gravity 1.*8 g/cm3; solid as a white solid, easy to absorb moisture, with a reduction, reaction with strong oxidants, density 1.***0g/cm3, soluble in water , Non-toxic non-corrosive. Usage is mainly used for the preparation of water wells filling solution, since the late nineties to a foreign potassium solution used in drilling and completion, especially used in high-density drilling and completion fluid systems, achieved good results. A drilling fluid system with the preparation of potassium, with a strong inhibition, good compatibility, environmental protection, reservoir protection, and other prominent advantages. Application results show that the inhibition of a potassium clay hydration points.