Casing pipe is a steel pipe used to line oil and gas wells for wall support.
Line Pipe is a core pipe for oil and gas transportation, used in long-distance, gathering and wellhead connecting pipelines, undertaking long-distance large-scale oil and gas transportation, adapting to different working conditions, and is a key equipment for oil and gas storage and transportation
Tubing Pipe is the conduit for oil and gas to flow from the reservoir to the surface.