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    新型SEW-80TT高抗擠套管的性能試驗(yàn)研究

    Test-study on Properties of New Type SEW-80TT High Collapse-resistant Casing

    • 摘要: 從顯微組織、殘余應(yīng)力、拉伸和沖擊性能、外壓擠毀性能、溝槽腐蝕性能等方面,分析研究了采用SEW(高頻焊接+熱張力減徑)工藝開發(fā)的SEW-80TT高抗擠套管的性能。結(jié)果表明:SEW-80TT高抗擠套管的抗擠強(qiáng)度超過Q/SY1394—2011標(biāo)準(zhǔn)中HC2等級(jí)要求的12.4%,比APITR5C3—2008標(biāo)準(zhǔn)要求的高41.6%,殘余應(yīng)力小于100MPa;屈服強(qiáng)度大于685MPa;母材和焊縫沖擊功分別大于126J和118J,且焊縫溝槽腐蝕不敏感。SEW-80TT高抗擠套管具有良好的抗擠毀性能和綜合力學(xué)性能。

       

      Abstract: Test study is conducted on the properties of the SEW-80TT high collapse-resistant casing that is developed with the SEW process(high-frequency welding + hot stretch-reducing),involving such properties as microstructure,residual stress,tensile strength,impact strength,external collapse-resistance and grooving corrosionresistance,etc. The test study result shows the property data of the said casing,i.e.,collapse-resistance:12.4% higher than the HC2 value as specified under Specification Q/SY 1394—2011,and 41.6% higher than what is required in Specification API TR 5C3—2008;residual stress:less than 100 MPa;yield strength:over 685 MPa,and impact values:base metal—above 126 J and welding seam—above 118 J. Accordingly,it is concluded that the SEW-80TT high collapse-resistant casing is in possession of satisfactory collapse-resistance and comprehensive mechanical properties as well.

       

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