Casing pipe is most commonly used in underground construction to protect utility lines of various types from getting damaged. In drilling industry, it is an ideal product for protecting household, irrigation, industrial and mining bore wells, preventing gravel accumulation and foreign matter from entering the bore wells, providing clean and clear water. It is used to support wall of the pipe, to ensure that the drilling and completion of the process of the normal operation of the wells. Generally, it is used with eccentric drill bit.
Classification：According to difference in materials, casing pipe can be divided into PVC casing pipe and steel casing pipe.