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发明公开
CN103695786A 一种耐蚀高抗挤石油套管及其生产方法 有权 转让

一种耐蚀高抗挤石油套管及其生产方法
摘要：
本发明公开了一种耐蚀高抗挤石油套管及其生产方法，其钢种的化学成分配比为：C：0.18~0.30wt%；Si：0.20~0.35wt%；Mn：0.90~1.30wt%；Cr：0~0.50wt%；Ti：0.01~0.07wt%；Mo：0.15~0.35wt%；V：0.01~0.05wt%；Ni：0~0.25wt%；Nb：0~0.05wt%；B：0.001~0.005wt%；Y：0.002~0.01wt%；P：≤0.008wt%；S：≤0.004wt%；余量为Fe。该套管采用“微合金化控轧控冷钢板+FFX成型+高频电阻焊接+焊缝碾压及退火处理+热张力减径+全管调质处理+热定径及热矫直”工艺制造而成。本发明的产品具有抗外压挤毁强度高、冲击韧性好、抗H2S/CO2/Cl-腐蚀性能优良的特点。
摘要（英）：

The invention discloses a corrosion-resistant highly-extrusion-resistant petroleum casing and a production method thereof. The type of steel comprises the following chemical components: 0.18-0.30 wt% of C; 0.20-0.35 wt% of Si; 0.90-1.30 wt% of Mn; 0-0.50 wt% of Cr; 0.01-0.07 wt% of Ti; 0.15-0.35 wt% of Mo; 0.01-0.05 wt% of V; 0-0.25 wt% of Ni; 0-0.05 wt% of Nb; 0.001-0.005 wt% of B; 0.002-0.01 wt% of Y; not more than 0.008 wt% of P; not more than 0.004 wt% of S; and the balance of Fe. The casing is manufactured by the process of microalloyed rolling-controlled cooling-controlled steel plates, FFX moulding, high frequency resistance welding, weld joint rolling and annealing processing, hot stretch reducing, whole pipe thermal refining, and hot sizing and hot straightening. The product of the invention has the characteristics of high anti-external extrusion collapse strength, good impact toughness, and excellent H2S/CO2/Cl-corrosion resistance.

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