天然氣井鋼管腐蝕破壞特征分析
An Analysis on Corrosion and Rupture Charactersof the Steel Tubing Used in Natural Gas Well
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摘要: 針對(duì)某些天然氣井鋼管與普通油管不同的腐蝕形貌,采用X-衍射及其灰關(guān)聯(lián)分析的方法對(duì)管道腐蝕破壞的原因進(jìn)行了分析。研究結(jié)果表明,CO2和水導(dǎo)致鋼管發(fā)生電化學(xué)腐蝕,而天然氣的沖蝕作用又加劇了這一過程,二者的共同作用是造成氣井鋼管腐蝕損壞的主要原因。Abstract: An analysis on corrosion and rupture characters of the steel tubing in natural gas well, which are different to those of the steel tubing in oil well, is done by use of X diffraction test and the grey relational analysis method. The result indicates that the CO2 and H2O contained in yielded gas caused electrochemical corrosion on tubing and the erosion action of yielded gas accelerated the corrosion process, which are main reason causing the perforation and rupture of tubing.
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