套管抗挤强度是衡量套管强度性能的一项重要指标。
The casing strength of collapse resistance is an important index of weighing the performance of casing strength.
实践证明，不圆度和壁厚不均度对套管抗挤强度的影响是相当可观的。
Practice shows that both ovality and eccentricity affect the casing collapse resistance obviously.
通过实例计算，对比分析了用“三向应力圆”理论与其他几种理论计算的抗挤强度值。
The monotone property of multivariate function proved that the maximum stress strength point exists on the inner surface of casing under the triaxial stress conditions.
通过实例计算，对比分析了用“三向应力圆”理论与其他几种理论计算的抗挤强度值。
The formula for calculating the axial stress of casing was discussed with theoretic deduction and calculation methods.
套管生产中，矫直工序决定了套管的形状精度和残余应力，对套管抗挤强度有很大影响。
In casing production straightening determines the shape precision and residual stress in casing, which have strong influence on the collapse resistance of casing.
随着套管制造工艺的不断改进和制造水平的显著提高，现有的A PI5c3模型已不能正确地预测套管的实际抗挤强度。
With the continuously improvement of the production and manufacture technology of tubing and casing, current API 5c3 model can not predict the actual casing strength.
利用推导的抗挤强度系数理论公式分析孔径、孔密及相位角的变化对其抗挤强度系数的影响，其结果为优化射孔设计提供了简便的方法。
The shot diameter, shot density and shot phasing related to the collapsing strength coefficient are analyzed, and the result is helpful to the perforation optimum design.
本文给出的高抗挤套管抗挤强度计算的建议模型，不仅可提供现行高抗挤套管抗挤强度的额定参考值，而且帮助厂家改进高抗挤套管质量。
The proposal model of the high collapse strength in this paper can't only provide the given reference for the present high collapse strength, but also improve the casing manufacturing quality.
研究了连续油管的工作力学特性，建立了连续油管弯曲、抗内压强度和外部挤毁压力、直径增长、纵向伸长及卡点位置分析计算模型。
Mechanical characteristic of ct is studied. The model of bending, internal pressure strength and external collapse strength, diametric growth and stuck-point of ct is established.
膨胀管残余应力是影响膨胀管抗外挤、内压强度的重要因素之一。
Residual stress in expansion casing is one of important factors affecting its squeezing and pressure resistance.
随着套管制造工艺水平的不断提高和制造质量的显著改进，现有的API5C3公式已不能正确的预测套管实际抗挤抗内压强度。
With the improvement of the production and manufacture technology of casing, the actual collapse strength of casing cannot be accurately calculated by present API 5C3 formula.
同时指出，在计算套管的抗挤毁强度时，用均匀磨损模型代替非均匀磨损模型，计算结果有较大误差。
It is also found that the collapse strength of the even wear model was different from that of the uneven wear one. A quite great error would happen if a wrong model has been used.
利用注水泥装置实现局部井段双层组合套管注水泥工艺，达到增加套管抗外挤强度的效果。
Using cementing equipments, the dual casing cementing technology in local intervals has been achieved to meet the requirements of the improvements of casing collapse resistance.
计算表明，在非均布外挤压力作用下，套管抗挤毁强度大大降低。
Calculation shows that the casing collapse resistance decreases greatly under nonuniform loads.
计算表明，在非均布外挤压力作用下，套管抗挤毁强度大大降低。
Calculation shows that the casing collapse resistance decreases greatly under nonuniform loads.
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