The result of analysis indicates that the remaining strength of perforating casing with different scheme for holding is different.
分析结果表明，不同布孔方案的射孔套管的剩余强度是不同的。
Casing-cement sheath and formation formed a vertical hydraulic isolation system; hydraulic isolation ability of the system formed by cementing mainly depends on defection and strength of the system.
固井水泥凝固后形成了一个纵向上的水力封隔系统，影响这个系统水力封隔能力的因素包括系统的缺陷和系统的强度。
It has a practical meaning for the strength design and combination usage of drill string, casing and tubing under different technological conditions.
对处于不同工艺条件下的钻柱、套管、油管的强度设计和组合使用等均有实际意义。
The casing strength design charts presented by this paper can be used to check the safety of the casing in salt bed or help perform casing strength design when the load is known.
可用来检测盐岩等流变地层中下入套管的安全性或在已知套管外载时进行套管强度设计。
By means of these expressions, formulas for calculating the axial and radial forces on the casing are derived and then the influence of steam flooding on casing strength is qualitatively analyzed.
根据这些表达式进一步推导套管轴向力和径向力的计算公式，然后根据这些公式定性地分析注蒸汽采油对套管强度的影响。
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.
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。
Since casing strength performance can be influenced by many factors, it is hard to confirm casing strength margin and its value.
套管强度性能受多种因素的影响，如何确定套管强度余量及其大小，是一个难题。
As an example with casing damage in Yushulin oil field of Daqing, the paper calculates the relations between injecting pressure, casing stress and casing strength.
以大庆榆树林油田砂岩段的套损情况为例，计算了注水压力、套管应力及套管强度之间的关系。
In strength of casing, based on analyzing the influences made by cementing, perforating and non-uniform, the concept of decrease factor of casing strength.
在套管的强度方面，分析了水泥坏、射孔、非均匀载荷等套管强度的影响，提出了套管强度减弱系数的概念。
The Bilateral Stress Elliptic(ellipse of plasticity) Theory is widely used in casing strength designing, as an approximate alternative to the four th strength theory.
作为第四强度理论的近似计算，目前在套管柱强度设计中广泛应用双向应力椭圆理论。
The hinge is apt to be pull apart and the strength of the hinge connection is insufficient owing to the action of the elevating force in the course of casing lifting.
在套管的提升过程中，由于提升力的作用，铰链接头的失效形式一般表现为铰链拉脱或强度不足。
The casing strength of collapse resistance is an important index of weighing the performance of casing strength.
套管抗挤强度是衡量套管强度性能的一项重要指标。
Causes of casing wear and its effects on casing strength in drilling operations of deep well, ultra-deep well, extended reach well and horizontal well are analyzed in this paper.
分析了在深井、超深井、大位移井和水平井钻井施工中套管磨损的原因及对套管强度的影响。
With finite element method, the collapse strength of casing with ovality and eccentricity under unidirectional uniform and ellipse distributive force was calculated and analyzed.
采用有限元法，计算和分析了壁厚不均与椭圆套管在单向均匀和单向椭圆分布外挤力作用下的强度问题。
The thesis also studied that the effect casing strength of casing wear and corrosion, established casing residual intensity computational module after casing wear and corrosion.
论文研究了套管磨损、腐蚀对套管强度的影响，并建立了套管磨损后和套管腐蚀后的剩余强度计算模型。
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.
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。
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.
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 main reason of casing failure in Zhongyuan oilfield is that casing strength is insufficient to resist the immense external force in salt interval.
中原油田套管损坏的主要原因是现有套管强度不够，无法抵抗盐膏层段的巨大外挤力。
Factors affecting the shearing strength of cemented casing are investigated.
考察了粘砂套管剪切强度的影响因素。
The relationships among perforation diameter, density, phase and casing strength are clarified.
明确了射孔直径、密度及相位等与套管强度的关系。
It's outer casing is made of high strength aluminium alloy, and treated by a special process. It's optical part is full coated.
外壳用高强度铝合金制造并经特殊处理，光学零件全镀膜。
Based upon the elasticity theory, a mechanical model for the casing pipe was built and the relationship between residual stress and compression strength was developed by FEM.
运用弹性力学理论，建立石油套管的力学模型，通过有限元计算，得到残余应力与石油套管抗压溃强度之间的关系。
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。
In addition to providing mechanical or structural strength, the casing thread must be compatible with the pressures and fluids associated with the application.
除了提供机械强度或结构强度外，套管螺纹还必须与相关的压力和流体相适应。
The experiment results demonstrated that the strength of the casing under nonuniform load is 8 to 21 times lower than that under uniform load.
实验结果表明：套管承受非均匀外载作用时其强度与承受均匀外压相比要低8 ~21倍。
These conclusions provide theoretic reference for the strength design and lifetime prediction of the casing.
为石油套管的强度设计和寿命预测提供了参考理论。
This paper describes the calculation methods of finite element strength for spokes frame casing, which is used in aero-engine by the actions of various complex loads.
本文阐述在航空发动机上使用的轮辐框架式承力机匣，在受各种复杂载荷作用下的有限元强度计算方法。
The results of calculation and test show that the strength of casing reduces along with the perforation density increases.
计算和试验结果都表明，射孔后套管的极限承载能力均有不同程度的下降，下降幅度与射孔密度有关。
The results of calculation and test show that the strength of casing reduces along with the perforation density increases.
计算和试验结果都表明，射孔后套管的极限承载能力均有不同程度的下降，下降幅度与射孔密度有关。
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