对预应力管道，预应力通过套管与裂纹管道过盈配合方式产生。
To prestressed sleeve, prestressed produced through interference fit between sleeve and crack pipeline.
因此要求这种套管必须具有相当的抵抗射孔裂纹迅速扩展的能力，即所谓的射孔性能。
Therefore, good resistance to the rapid propagation of perforation cracks, or the so-called perforation performance must be required for the casing pipes.
采用金相等方法，对J55钢套管坯上的裂纹进行了分析。
The analysis has been taken on the cracks occurring in semi-products of J55 sleeve pipes.
射孔性能是油层套管很重要的一项指标，它代表着油层套管抵抗裂纹脆性扩展的能力。
The perforation performance is an important index of oil - layer casing representing the resistance to initial brittle crack growth.
分析了工程实例中裂纹缺陷对套管安全的影响。
Finally, influence on safety of oil thimble is analyzed by the size of crack in engineering application.
分析了真空白耗电弧炉铜-不锈钢异种金属套管式电极杆焊接裂纹产生的机理。
The mechanism of welding crack generation in the copper - stainless steel tube electrode stem of Vacuum Consumable Arc Furnace has been analyzed.
对己经下入了C110油套管的井，防止后期作业诱发裂纹至关重要，新的设计方法对油气田在油套管的选材上具有重要参考价值。
For the well with C110, it is important to prevent cracks in late workings. So this new design method provides great reference value for Wells to choose proper casing material.
对己经下入了C110油套管的井，防止后期作业诱发裂纹至关重要，新的设计方法对油气田在油套管的选材上具有重要参考价值。
For the well with C110, it is important to prevent cracks in late workings. So this new design method provides great reference value for Wells to choose proper casing material.
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