石油工业在国民经济中占有很重要的地位。随着石油工业的迅速发展,钻井深度不断增加,目前从陆地发展到海底开发石油资源,对油管的数量、质量要求日益增高,对油管的强度要求也愈高。又由于油井钻采作业工作环境恶劣,因此要求钢管必须承受各种应力,如抗拉力、挤压应力等作用,同时还要具备抗低温、抗硫化氢腐蚀等良好性能。 The oil industry occupies a very important position in the national economy. With the rapid development of petroleum industry, the drilling depth has been increasing. At present, the development of oil resources from the land to the sea floor requires increasing quantity and quality of tubing and higher requirements on the strength of tubing. Due to the poor working environment of well drilling, it is required that the steel pipe be subjected to various stresses such as tensile strength and compressive stress, and at the same time, should possess good properties of resistance to low temperature and hydrogen sulfide corrosion.