1. This new model shall provide an effective tool both in understanding the mechanism of the CT ballooning and for accurately predicting the CT diametral growth. 这一模型将为理解连续油管鼓胀的机理以及准确预测连续油管直径增长提供一个有效的工具。
2. The model results show that when the CT is cycled under the action of an internal pressure, fatigue cyclic softening inevitably leads to the diametral growth. 理论模型计算结果表明，当连续油管在内压下循环弯曲时，疲劳循环屈服强度衰减不可避免地导致直径增长。
3. Then, a logic computational diagram is constructed for calculating diametral growth by assuming fatigue cyclic softening, namely yield strength reduction as tubing fatigues. 再通过合理的假设，建立用于计算直径增长的计算机逻辑框图。
