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    SEW石油套管的開發(fā)

    Research and Development of SEW Oil Casing

    • 摘要: 采用高頻電阻焊、熱張力減徑及整管熱處理工藝開發(fā)了J55、N80Q及P110鋼級(jí)SEW石油套管,對開發(fā)的SEW石油套管進(jìn)行了力學(xué)性能和抗腐蝕性能測試。結(jié)果表明:同石油套管用無縫鋼管相比,SEW石油套管在尺寸精度、殘余應(yīng)力及抗外壓擠毀強(qiáng)度方面具有較大的優(yōu)勢;采用SEW工藝,較好地解決了焊縫沖擊韌性低及抗腐蝕性能差的問題。分析認(rèn)為:在鋼級(jí)和規(guī)格一定的情況下,采用SEW石油套管可解決選用石油套管用無縫鋼管帶來的抗擠強(qiáng)度不足問題,滿足油田用戶的需求。

       

      Abstract: SEW oil casings in steel grades of J55, N80Q and P110 are developed by means of employment of such processes as HFW, hot stretch-reducing and pipe over-length heat treatment. The mechanical properties and corrosion resistance of the SEW oil casing are tested. The results show that the data of dimensional accuracy, residual stress and external collapse strength of the SEW casing are much better than the seamless oil casing. Moreover, thanks to the SEW process, the problem of low impact toughness and poor corrosion resistance of weld seam is properly fixed. Based on the above mentioned analysis, it is concluded that in case of the same specific steel grade and size, using the SEW casing can avoid the shortcoming of poor collapse strength as staying with the seamless casing so as to meet the requirements by oilfield end users.

       

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