P110钢级中大直径高频电阻焊表层套管研制
Welded Pipe and Tube(2023)
Abstract
为了满足深井超深井油气开采对中大直径高钢级表层套管的需求,采用中低碳加少量Cr、B元素成分设计,并使用高频电阻焊+全管体调质热处理工艺技术,开发试制了Φ244.48 mm×11.05 mm P110钢级石油套管.结果表明,试制产品的屈服强度、抗拉强度和延伸率的平均值分别为895 MPa、975 MPa、25.0%;0℃下3/4尺寸母材和焊缝横向冲击功平均值分别达到77 J和73 J,基本实现母材与焊缝"等韧性"匹配;接头螺纹连接强度>6176 kN,抗内压强度>60 MPa,抗外压挤毁强度平均值达43.5 MPa,各项性能指标均符合API SPEC 5CT、API TR 5C3等标准要求,能够满足深井超深井用高钢级表层套管安全服役要求.
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