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| 径向凹陷变形由于套管本身某局部位置质量差,强度不够,在固井质量差及长期采注压差作用下，套管局部产生缩径，而某处扩径使套管在横截面上呈内凹形椭圆形变形。这种径向内凹陷型变形是套损井中基本变形形式,也是最常见的变形形式 | |||
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