Abstract:The requirement on the quality control in the technical specifications is very strict for drilling of the solution mining intersected well sets at Kazan Trona Mine. The vertical wells were easily deviated, with low core recovery and poor cement bonding due to the complex geology, the high dip angle of the formation, and presence of several aquifers; meanwhile, for the horizontal well, it was very difficult to control the trajectory. After a thorough analysis of data obtained from previously drilled wells and a study of related issues and optimization of solutions, several measurements were put forward and applied. The results showed that all the drilling problems were effectively solved, the drilling process was improved, and the construction period was reduced. The experience acquired from the project could be used as reference for the similar works.