套管弯曲力的定义不够严格，把弯曲力加到垂直井段是不正确的。

The definition of casing bend force is not exact, and taking the bend force into account for casing design in the vertical interval is not correct.

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对油水井套管损伤情况的检测是工程测井的主要内容之一，36臂成像井径测井能较准确判断套管弯曲、变径、变形等情况。

It is one of main content for engineering to estimate effect of casing damage. Technology of 36-finger image caliper can judge bend, changing diameter, distortion of casing.

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为解决产层套管的弯曲问题，通过建立压实、出砂引起的弯曲套管的力学模型，来解释部分层段产生相对滑动以及弯曲的机理。

To solve the problem, this paper establishes a mechanical model of casing bend to explain the relative slipping and casing bend mechanism for some layer segments.

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