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| 石油套管几何缺陷对抗挤强度的影响 | |
| 引用本文： | 蔡晓闻,高连新,常龙,杜建青.石油套管几何缺陷对抗挤强度的影响[J].石油矿场机械,2009,38(2):38-41. |
| 作者姓名： | 蔡晓闻 高连新 常龙 杜建青 |
| 作者单位： | 1. 华东理工大学化工机械研究所,上海,200237 2. 中国船舶重工集团公司第七○四研究所,上海,200031 3. 胜利油田滨南采油厂,山东滨州,256606 |
| 摘 要： | 在考虑几何缺陷等因素的条件下，建立了计算套管挤毁的有限元模型，并根据试验结果对模型进行了验证。该模型具有较高的计算精度，可用于石油套管挤毁计算的有限元模拟。将不圆度和壁厚不均度分开考虑，分别计算出其中一种缺陷因素影响下套管的抗挤强度。结果表明，理想圆管的承载能力高于存在几何缺陷的套管；不圆度对抗挤强度的影响较大；壁厚不均度的影响相对较小。 |
| 关 键 词： | 不圆度 壁厚不均度 挤毁强度 有限元 |
Influence by Oil Casing Imperfections on Anti-Collapse Strength |
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| CAI Xiao-wen,GAO Lian-xin,CHANG Long,DU Jian-qing.Influence by Oil Casing Imperfections on Anti-Collapse Strength[J].Oil Field Equipment,2009,38(2):38-41. | |
| Authors: | CAI Xiao-wen GAO Lian-xin CHANG Long DU Jian-qing |
| Affiliation: | CAI Xiao-wen ,GAO Lian-xin ,CHANG Long ,DU Jian- qing( 1. Institute of Pressure Vessel and Process Equipment, East China University of Science and Technology,Shanghai 200237, China ; 2. No. 704 Research Institute, CSIC, Shanghai 200031, China ; 3. Binnan Oil Produclion Factory, Shengli Oilfield , Binzhou 256606, China) |
| Abstract: | A finite element model which contains the effects on geometric imperfections has been modified by many experiments. According to the experimental data and the finite element analysis, the finite element model of casing collapse was very accurate. Considering ovality and eccentricity separately, anti collapse strength could be calculated. A conclusion was made that extrusion strength of perfect casing was heavier than that of imperfect casing. Ovality was the most important factor of anti-collapse strength. Eccentricity had less effect on anti-collapse strength. |
| Keywords: | ovality eccentricity anti collapse strength finite element method |
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