| 膨胀套管膨胀力的理论计算 |
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| 引用本文： | 龚龙祥 付建红 林元华 甘升平 李智平. 膨胀套管膨胀力的理论计算[J]. 钻采工艺, 2006, 29(4): 76-77,90 |
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| 作者姓名： | 龚龙祥 付建红 林元华 甘升平 李智平 |
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| 作者单位： | [1]油气藏地质及开发工程国家重点实验室·西南石油大学,610500 [2]四川石油管理局川西钻探公司,610500 [3]四川科宏石油天然气工程公司川南分公司,610500 |
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| 基金项目： | CNPC石油科技中青年创新项目 |
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| 摘 要： | 根据弹塑性的理论，推导了膨胀套管在弹性变形区和塑性变形区的周向应力和径向应力计算模型，确定了膨胀套管膨胀时在膨胀芯头与套管之间所需的最小接触载荷。对膨胀芯头的受力进行了分析，考虑了膨胀芯头几何参数和金属间摩擦系数等影响因素，建立了作用在膨胀芯头上膨胀套管所需膨胀力的计算方法，对相关参数对膨胀芯头拉力的影响进行了讨论，并用实验数据对理论计算结果进行了验证，结果表明，采用本文推导的计算模型所得到的芯头膨胀拉力的计算精度满足工程应用的需要。
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| 关 键 词： | 膨胀套管 膨胀力 膨胀芯头 临界荷载 |
| 文章编号： | 1006-768X（2006）04-0076-02 |
| 收稿时间： | 2006-01-23 |
| 修稿时间： | 2006-01-23 |
THEORETICAL CALCULATION OF BULGING FORCE ON EXPANSION CASING |
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| GONG Longxiang,FU Jianhong,LIN Yuanhua,GAN Shengping and LI Zhiping. THEORETICAL CALCULATION OF BULGING FORCE ON EXPANSION CASING[J]. Drilling & Production Technology, 2006, 29(4): 76-77,90 |
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| Authors: | GONG Longxiang FU Jianhong LIN Yuanhua GAN Shengping LI Zhiping |
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| Affiliation: | GONG Longxiang1,FU Jianhong1,LIN Yuanhua1,GAN Shengping2 and LI Zhiping3 |
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| Abstract: | According to the elastic-plastic theory, the calculation method of tangential stress , radial stress of expansion casing both in elastic deformation area and in plastic deformation area is deduced and the minimum critical load between expansion core and casing was determined.The paper analyzed the force of expansion core, considered the influences of friction coefficient and expansion cone angle on critical load, the calculation method of bulging force of expansion casing is given. The influence of related parameters on tension of expansion core were discussed. The theoretical calculation results of tension of expansion core were compared with experimental data, and it is shown that the accuracy of the theoretical calculation meets the needs of engineering application. |
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| Keywords: | expansion casing bulging force expansion core critical load |
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