首页|膨胀管实体膨胀锥受力分析与膨胀试验验证

膨胀管实体膨胀锥受力分析与膨胀试验验证

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膨胀管技术主要应用在油气田开发领域,膨胀锥是膨胀管技术主要工具之一,在工作时受到极大的界面应力,因此膨胀锥表面过快磨损是制约膨胀管技术发展的主要问题之一.为探究膨胀过程中膨胀锥体表面受力和应力分布,结合弹塑性理论推导膨胀锥接触应力和摩擦力计算模型,采用有限元方法模拟膨胀管膨胀过程,研究膨胀锥表面应力、接触摩擦应力和膨胀推力变化情况,并通过膨胀试验验证了有限元模拟结果的合理性.结果表明:影响膨胀锥接触应力和摩擦力的主要因素是膨胀管屈服强度和膨胀锥锥角;膨胀锥的最大等效应力集中在大径圆角处,最大摩擦应力集中在膨胀锥小径和大径处;膨胀锥膨胀区只有部分与膨胀管内壁接触,膨胀锥小径处受拉应力,大径处受压应力,最大接触压应力集中在大径处.
Force Analysis and Expansion Test Verification of Solid Expansion Cone of Expandable Tubular
Expandable tubular technology is mainly applied in the field of oil and gas field development.Expansion cone is one of the main tools of expandable tubular technology,which is subjected to great interface stress during operation.Therefore,the rapid wear of expansion cone surface is one of the main problems restricting the development of expandable tubular technology.To investigate the surface friction and stress distribution of the expansion cone during the expansion process,the calculation models for the contact stress and friction of the expansion cone were derived based on elastic-plas-tic theory.The finite element method was used to simulate the expansion process of the expansion tube,and to study the changes in surface stress,contact friction stress,and expansion thrust of the expansion cone.The rationality of the finite ele-ment simulation results was verified through expansion tests.The results show that the main factors affecting the contact stress and friction of the expansion cone are the yield strength of the expansion tube and the cone angle of the expansion cone.The maximum equivalent stress of the expansion cone is concentrated at the fillet of its large radius,and the maximum friction stress is concentrated at the position of the small and large diameters of expansion cone.The expansion zone of the expansion cone only partially contacts with the inner wall of the expansion tube.The position of the small diameter of ex-pansion cone is subjected to tensile stress,while the position of the large diameter of expansion cone is subjected to com-pressive stress.The maximum contact compressive stress is concentrated at the position of the large diameter of expansion cone.

expansion coneexpandable tubularcontact pressurefrictional forceelastic-plastic theory

郭慧娟、王鑫、赵运才

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中国石油集团工程技术研究院有限公司,北京 102200

江西理工大学机电工程学院,江西赣州 341000

膨胀锥 膨胀管 接触压力 摩擦力 弹塑性理论

中国石油集团工程技术研究院有限公司横向科研协作项目

2021360702005941A

2024

润滑与密封
中国机械工程学会 广州机械科学研究院有限公司

润滑与密封

CSTPCD北大核心
影响因子:0.478
ISSN:0254-0150
年,卷(期):2024.49(2)
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