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。
Practice shows that both ovality and eccentricity affect the casing collapse resistance obviously.
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。
Distribution of Triassic salt bed is very wide in Sichuan Area and the condition of salt rock creep resulting in casing collapse is existing.
四川地区三迭系盐岩层分布广泛，盐岩层蠕变挤毁套管的客观条件是存在的。
Two practical problems in the petroleum exploitation about casing collapse and sand production are taken as examples to make some explication.
就该理论在石油开发领域注水引致的套管损坏及产层出砂问题的具体应用进行了简单的讨论。
Then the improved model is used to calculate the final casing collapse strength. This method combines FEA and strain test together and thus can get more …
该方法将有限元计算与应变检测结合起来，大大提高了有限元计算的精度，对预测套管的挤毁压力、指导高抗挤套管的开发具有一定的参考价值。
In this paper, the influence of casing eccentric wear with different diameter on casing collapse resistance capacity was researched by finite element software.
文章主要运用有限元软件，研究了不同钻杆直径造成的套管偏磨对套管抗挤毁能力的影响。
Its result is coincident with that of simulating test of casing collapse very well. This 3-d physical model considers factors of formation, casing program and corrosion etc.
该空间力学模型考虑了地层因素、井身结构因素、腐蚀因素等，其计算结果与套管抗挤毁的模拟试验结果非常吻合。
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.
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。
The short liner cementing technique can successfully solve some difficult technical problems, such as casing collapse, loss circulation during ultra deep exploratory well drilling operations.
超深探井在钻进过程中出现套管挤毁、井漏而常规封堵无效等复杂问题，影响了下一步正常钻进，短回接尾管固井技术能很好地解决该技术难题。
The problems of low drilling efficiency and low core recovery due to borehole collapse were solved with pulling in casing while drilling through using combined BHA with casing.
采用组合钻具进行跟管钻进，通过随钻跟入的套管保护孔壁，解决因钻孔垮塌导致钻探效率和岩心采取率低等技术难题。
In casing production straightening determines the shape precision and residual stress in casing, which have strong influence on the collapse resistance of casing.
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。
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。
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。
A comparison is made on the anti-collapse capability of the casing with and without cement sheath by means of full-scale test.
采用全尺寸实物试验方法对套管有无水泥环情况下的抗挤毁能力做了对比试验。
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。
This paper gives the elastic differential equation of collapse of perforated casing, and a general formula for reduction factor of elastic collapsing by perturbation method.
建立了射孔段套管弹性抗挤性能分析控制一般方程，并采用摄动理论给出了的孔段套管弹性抗挤能力降低系数一般计算公式。
Casing damage is the bottleneck problem for oil and gas production. Reasonable design of collapse load is vital to the life of casing.
套管损坏是制约油气生产的瓶颈问题，而套管外挤载荷设计合理与否对套管寿命具有决定性的作用。
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 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。
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