Drilling Technology in Potassium Deposit

Abstract:

Potassium salt is the main raw material for producing potassium fertilizer, and it is a shortage mineral in China with the highest import dependency. Because of its buried depths （10～2000 m), solubility, water absorption and fracture development, special drilling technology is required. According to the drilling construction experience and characteristics of potassium salt both in China and abroad, the study was made on core drilling machinery and equipment, drilling technology and flush fluid.

Key words:potassium salt; borehole structure; drilling technology; water stoppage; flush fluid; base oil