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Oil special pipe use and category

Posted by:Rain Time:2019.07.15 20:15

The oil special pipe is mainly used for drilling oil and gas wells and 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.


Oil casing is the lifeline for maintaining oil well operations. Due to different geological conditions, the state of the downhole is complicated, 

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. The casing itself is also 

required to have corrosion resistance in a corrosive environment. In places with complex geological conditions, the casing is also required to 

have anti-crushing properties.

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