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Used for oil well drilling mainly for supporting the well wall during the drilling process and after the completion of the well to ensure the drilling process and the normal operation of the whole well after the completion of the well. The development trend of oil fields will be from land to shoal and from shallow sea to deep sea, coupled with deeper and deeper drilling depths and increasingly complex drilling working conditions, the requirements for oil casing are bound to become higher and higher.

Anti-corrosion countermeasure of oil casing ：first of all, the quality of water standards, strict water quality testing and management. The implementation of decontamination, strengthen the cleaning of the main water pipeline, to achieve the station, the bottom of the well water quality standards, reduce the introduction of corrosion sources into the ring space. Oil casing is the lifeline of oil well operation. Due to different geological conditions, underground stress state is complex, tensile, compressive, bending and torsional stress act on the pipe body, which puts forward higher requirements on the quality of casing itself.