Petroleum casing, also called petroleum special pipe, is mainly used for the drilling of oil and gas wells and the transmission of oil and gas. It includes oil drilling pipe, oil casing and oil pumping pipe. Oil drill pipe is mainly used to connect drill collar and drill bit and transmit drilling power.
Oil casing is mainly used to support the well wall during the drilling process and after completion to ensure the drilling process and the normal operation of the whole well after completion. The pumping pipe is mainly used to transport oil and gas from the bottom of the well to the surface. Oil casing is the lifeline that keeps the well running. Due to the different geological conditions, the downhole stress state is complex, with tensile, compressive, bending and torsional stresses acting on the tubing body in an integrated manner, which places high demands on the quality of the casing itself. Once the casing itself is damaged for some reason, it may lead to production reduction of the whole well or even scrapping. According to the strength of the steel itself, casing can be divided into different steel grades, i.e. J55, K55, N80, L80, C90, T95, P110, Q125, V150, etc. Different well conditions and depths require different steel grades. In corrosive environments, the casing itself is required to have corrosion resistance. In complex geological conditions, the casing is also required to have anti-crushing properties.
Tiangang Petroleum mainly specializes in the production and sales of high-end oil special pipe, special and casing, pipeline pipe, slit screen pipe, composite screen pipe and clamps. The products are sold to major oil fields in northeast, north, central and northwest China, and exported overseas to more than 50 countries and regions in Europe, America, Africa, the Middle East and Southeast Asia.