What is the use and classification of oil-specific welded pipes? Oil-specific welded pipes are mainly used for drilling oil and gas wells and for conveying oil and gas. It includes oil drill pipes, oil casings, and oil pipes.
Oil drill pipes are mainly used to connect drill collars and drill bits and transmit drilling power. The oil casing is mainly used for supporting the well wall during and after the completion of the drilling process to ensure the drilling process and the normal operation of the entire well after completion. The oil pipe mainly transports the oil and gas at the bottom of the oil well to the ground. In the used species, the strength of the oil-extracted welded pipe is required to ensure the normal extraction and transmission of crude oil and gas. Oil casing is the lifeline for maintaining oil well operations. Due to different geological conditions, the downhole stress state is complex, and the combined action of tension, compression, bending and torsion stress acts on the pipe body, which puts high requirements on the quality of the casing itself. Once the casing itself is damaged for some reason, it may result in a reduction in production and even scrapping of the entire well.
According to the strength of the steel itself, the casing can be divided into different steel grades, namely J55, K55, N80, L80, C90, T95, P110, Q125, V150 and so on. The well conditions and well depth are different, and the steel grades used are also different. In the corrosive environment, the welded pipe itself is also required to have corrosion resistance. It is also required that the casing has anti-crushing properties in places with complicated geological conditions.
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