Oil casing pipe is a steel pipe used to support the well wall of oil and gas wells and ensure the normal operation of the entire oil well during drilling and after completion. Each well uses several layers of casing pipe according to different drilling depths and geological conditions. After the casing pipe is lowered into the well, cement is used to cement the well. Unlike oil pipes and drill pipes, it cannot be reused and is a one-time consumable material. Therefore, the consumption of casing pipe accounts for more than 70% of all oil well pipes. Casing pipe end processing forms: short round thread, long round thread, trapezoidal thread, special buckle, etc. Used in oil well drilling, mainly used to support the well wall during drilling and after completion, to ensure the progress of the drilling process and the normal operation of the entire oil well after completion.