What is the purpose of oil casing pipe?
Oil casing pipe is a steel pipe used to support the well wall of oil and gas wells to ensure the normal operation of the entire oil well during the drilling process and after completion. Each well uses several layers of casing based on different drilling depths and geological conditions. Cement must be used to cement the casing after it is lowered into the well. Unlike oil pipes and drill pipes, it cannot be reused and is a one-time consumable material. Therefore, the consumption of casing accounts for more than 70% of all oil well pipes. Casing is a series of steel pipes inserted into a drilled oil well to stabilize the well, prevent contaminants and water from entering the oil flow, and prevent oil from seeping into the groundwater. The casing is installed in layers of sections of decreasing diameter that are joined together to form the casing string. Casing can be divided into: conduit, surface casing, technical casing and oil layer casing according to usage. Diffe...