【摘要】 借助于自制的旋转弯曲腐蚀疲劳试验机，模拟钻井现场条件，研究了钻杆４０Ｃｒ钢在高含Ｈ２Ｓ钻井液中的腐蚀及腐蚀疲劳、Ｏ＿２和Ｈ＿２Ｓ对腐蚀疲劳的作用机制；还研究了缓蚀剂咪唑啉和除氧剂Ｎａ＿２ＳＯ＿３对钻杆腐蚀疲劳的抑制作用，以及外加电流对腐蚀疲劳的影响等，实验结果表明，钻井液添加缓蚀剂和除氧剂后，增加了４０Ｃｒ钢腐蚀疲劳寿命。更多还原

【Abstract】 A study of corrosion fatigue of drill pipe made of steel type 40 Cr in Drilling fluids witha high content of H2S has been carried out with a self-made rotary type bending corrosion fa-tigue testing apparatus under simulated drilling conditions.The mechanism of the effects ofO₂ and H₂S on corrosion fatigue and the inhibiting action of the imidazoline inhibitor and O₂scavenger（Na₂SO₃）on corrosion fatigue of drill pipe as well as the effect of the externallyapplied current on corrosion fatigue are also studied.Experimental results show that the fa-tigue life of 40 Cr is lengthened after adding corrosion inhibitors and O₂ scavenger.更多还原