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首页> 外文期刊>Stainless steel world >New generation of tubluar materials for downhole and subsurface umbilical applications in the oil and gas industry
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New generation of tubluar materials for downhole and subsurface umbilical applications in the oil and gas industry

机译：石油和天然气工业中用于井下和地下脐带应用的新一代管状材料

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The new generation of super-austenitic grades can offer very good resistance to crevice corrosion in high temperature seawater and can be suitable for applications beyond the capabilities of 25 Cr duplex. The super-austenitic alloy, N08031, has been shown to be suitable for manufacture of long length coiled tubing in the annealed condition following seam welding and drawing. The autogenous orbital joints have also been found to exhibit similar corrosion resistance to the base material. A review of crevice corrosion data in seawater has shown a wide spread in crevice corrosion results reported. This is affected by the testing technique and the environmental conditions. Cold working of super-austenitic alloys has shown to be capable of providing strength levels equivalent or higher than 25 Cr duplex. The tubes can be supplied in very long coiled lengths including high strength cold worked orbital joints. An overlay weld joining technique on cold worked tube showed that the joint could achieve similar strength to the base tube material. The lean duplex alloy grade AL2003 has shown it can be readily fabricated into seam welded and drawn coiled tubing, whilst maintaining good mechanical and corrosion properties.
机译：新一代的超级奥氏体钢种可以对高温海水中的缝隙腐蚀提供非常好的抵抗力，并且可以适用于25 Cr双相钢以外的应用。已显示，超级奥氏体合金N08031适用于在缝焊和拉拔后的退火状态下制造长管材。还发现自生轨道接头具有与基材相似的耐腐蚀性。对海水中缝隙腐蚀数据的审查显示，所报告的缝隙腐蚀结果分布广泛。这受测试技术和环境条件的影响。已显示超级奥氏体合金的冷加工能够提供与25 Cr双相钢相当或更高的强度水平。这些管可以以非常长的盘绕长度提供，包括高强度冷加工轨道接头。冷加工管上的堆焊焊缝技术表明，该接头可以达到与基管材料相似的强度。等级为AL2003的贫双相合金表明，它可以很容易地制成缝焊和拉拔的连续油管，同时保持良好的机械性能和腐蚀性能。

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