The oil casing is a large-diameter pipe that functions as a fixed oil and gas well wall or wellbore. The casing is inserted into the wellbore and cemented to prevent the wellbore from separating the rock formation and the wellbore collapse, and to ensure that the drilling mud is circulated for drilling and exploration.
In order to improve the quality of the oil well pipe and pipe, the oil casing plant utilizes imported technology, joint design, and joint manufacturing equipment. It uses continuous casting round billet, annular heating furnace, conical roller piercing punch, and precision rolling mill rolling. system.
Oil casing plant production process: EAF steelmaking → Post furnace refining → Vacuum degassing → Continuous casting → Heat transfer → Tube heating → Perforation → Tube rolling → Sizing → Cooling thermostat (reserved) → Online quenching (pre Leave) → tempering (reserved) → sizing (reserved) → cooling → straightening → flaw detection → sawing → cutting head → inspection → straight track tube processing.
china Oil Country Tubular Goods(OCTG) can be divided into different steel grades according to the strength of the steel itself, namely J55, K55, N80, L80, C90, T95, P110, Q125, V150 and so on. Well conditions, different well depths, and different steel grades are used. Corrosion environments also require the casing itself to be corrosion resistant. In places where the geological conditions are complex, the casing is also required to have the ability to resist collapse. The oil casing 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 after the drilling process is completed and completed. Each well requires several layers of casing based on different drilling depths and geology. After the casing is drilled, cement is used to cement the well. Unlike cement pipes and drill pipes, it cannot be reused and is a disposable material. Therefore, casing consumption accounts for more than 70% of all oil well pipes. Casings can be categorized according to use conditions: conduits, surface casings, technical casings, and reservoir casings.
US standard oil casing API5CT American standard quality products, oil casing steel grade: H40, J55, K55, N80, L80 and so on. Tubular end machining type: short round thread, long round thread, trapezoidal thread, special buckle, etc. Drilling for oil wells is mainly used to support the wellbore during and after drilling to ensure the normal operation of the entire well after the drilling process is completed.