結構用無縫鋼管主要用于油、氣井的鉆探及油、氣的輸送。它包括結構用無縫鋼管、結構用無縫鋼管、抽油管。結構用無縫鋼管主要用于連接鉆鋌和鉆頭并傳遞鉆井動力。結構用無縫鋼管主要用于鉆井過程中和完井后對井壁的支撐，以保證鉆井過程的進行和完井后整個油井的正常運行。抽油管主要將油井底部的油、氣輸送到地面。

Seamless steel pipe for structure is mainly used for oil and gas well drilling and oil and gas transportation. It includes seamless steel pipe for structure, seamless steel pipe for structure and pumping pipe. Seamless steel pipe for structure is mainly used to connect drill collar and bit and transfer drilling power. The structural seamless steel pipe is mainly used to support the wellbore during drilling and after completion, so as to ensure the normal operation of the whole well after completion. The pumping pipe mainly conveys oil and gas from the bottom of the well to the ground. 結構用無縫鋼管是維持油井運行的生命線。由于地質條件不同，井下受力狀態復雜，拉、壓、彎、扭應力綜合作用作用于管體，這對結構用無縫鋼管本身的質量提出了較高的要求。一旦結構用無縫鋼管本身由于某種原因而損壞，可能導致整口井的減產，甚至報廢。

Seamless steel pipe for structure is the lifeline to maintain oil well operation. Due to the different geological conditions, the stress state of underground is complex, and the comprehensive action of tension, compression, bending and torsion stresses acts on the pipe body, which puts forward higher requirements for the quality of seamless steel pipe for structure. Once the structural seamless steel tube itself is damaged for some reason, it may lead to production reduction or even scrap of the whole well.

按鋼材本身的強度結構用無縫鋼管可分為不同鋼級，即J55、K55、N80、L80、C90、T95、P110、Q125、V150等。井況、井深不同，采用的鋼級也不同。在腐蝕環境下還要求結構用無縫鋼管本身具有抗腐蝕性能。在地質條件復雜的地方還要求結構用無縫鋼管具有抗擠毀性能。

Seamless steel pipes can be divided into different grades according to the strength structure of steel, namely J55, K55, N80, L80, C90, T95, P110, Q125, V150, etc. Wellbore condition and depth are different, and the steel grade used is also different. In corrosive environment, seamless steel tube for structure is also required to have corrosion resistance. Where geological conditions are complex, it is also required that seamless steel tubes for structures have anti-collapse properties.