BAOWI STEEL MANUFACTURING CO.,LTD

The American Petroleum Institute (API) and the International Organization for Standardization (ISO) have established two basic types of pipes used for exploration and production in the oil and gas industry: casing and tubing. Casing and Tubing also known as OCTG. Casing and tubing strings are the main parts of the well construction. All wells drilled for the purpose of oil or gas production (or injecting materials into underground formations) must be cased with material with sufficient strength and functionality. Well casing pipe is a pipe used in oil, gas, or water wells to protect the well walls and stabilize the wellbore.Casing pipe is used to line the drilled borehole that is being utilized for oil extraction. Similar to drill pipes, oil well casing pipe is also subjected to axial tension and therefore needs to be made from high-quality, strong steel. Casing (well pipe casing) is a large-diameter pipe fixed in the borehole using cement.Tubing is the pipe used after drilling is completed to transport crude oil and natural gas from the oil or gas reservoir to the surface.