论文部分内容阅读
一、前言我国石油工业的迅速发展,对石油钻采钢管的要求愈来愈高。随着钻井深度的增加,对钻采钢管的强度要求也越来越高。为获得高强度,就目前来看,也只有一是采用增加合金元素,即采用合金钢;二是采用热处理的办法,即采用碳钢或低合金钢通过正火、调质、形变热处理等方法获得高强度。但对同一钢种而言,为了提高石油钻采钢管螺纹连接部分的强度,一般采用管端加厚的方法,增加钢管管端壁厚,使其在钻井深度相同的情况下,较端部不加厚钢管,更为安全可靠。一般加厚管比不加
I. Preface The rapid development of China’s petroleum industry has raised the demand for petroleum drilling pipe. With the increase of drilling depth, the strength of drilling steel pipe is also getting higher and higher. In order to obtain high strength, for the moment, only one is to use an alloy element, that is, alloy steel; the other is to adopt a heat treatment method of using carbon steel or low alloy steel through normalizing, quenching and tempering, heat treatment of deformation and the like Get high strength. However, for the same steel grade, in order to increase the strength of the threaded connection portion of oil drilling pipelines, pipe end thickening method is generally adopted to increase the thickness of the pipe end wall so that when the drilling depth is the same, Thicker steel pipe, more safe and reliable. Generally thicker tube than not