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    鈦合金油井管性能研究及應(yīng)用評價現(xiàn)狀

    Status Quo of Research on Properties of Titanium Alloy OCTG and Relevant Application Evaluation

    • 摘要: 介紹了鈦合金油井管的特點；總結(jié)了pH值、溫度、H2S含量、完井液、酸液、SSCC測試方法等對鈦合金油井管耐腐蝕性能的影響，國內(nèi)外對鈦合金油井管機械性能以及螺紋連接等的研究成果，以及應(yīng)用評價情況。分析認為：鈦合金油井管具有密度低、強度高、耐腐蝕性能優(yōu)異等特點；在模擬氣田采出環(huán)境（高含H2S-CO2、S，高濃度的氯化物地層水）和氣田酸化等環(huán)境中，鈦合金油井管的腐蝕速率均較低，耐腐蝕性良好；機械性能和螺紋連接性能是研發(fā)鈦合金油井管的兩個關(guān)鍵所在。

       

      Abstract: Described here are the characteristics of the titanium alloy OCTG，and summarized are the elements affecting the corrosion resistance thereof，including pH value， temperature， H2S content，completion fluid，acid fluid and SSCC testing method， etc. The assay also presents achievements about the researches on mechanical properties and thread connection of the titanium alloy OCTG，and relevant application evaluations as made both at home and abroad. Based on the analysis， conclusions are made as follows. The titanium alloy OCTG features low density，high strength，and excellent corrosion resistance，etc.，and has rather low corrosion rate and fine corrosion resistance under both the simulated gas recovery conditions （high H2S-CO2 contents，element of S，stratum water containing high concentration chloride，etc.） and gas field acidification environment. And mechanical properties and thread connection performance are considered as the two critical issues related to R & D of titanium alloy OCTG.

       

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