A flexible connector of lifting pipes in a deep sea mining system is designed. The buttress thread （ based on API standard） is used and foreign experience in connector design is referred to. With this kind of connec...A flexible connector of lifting pipes in a deep sea mining system is designed. The buttress thread （ based on API standard） is used and foreign experience in connector design is referred to. With this kind of connector, the lifting pipe wiU only bear the axial force, free of moment. The strength of the connector is analyzed in detail, including the connecting strength of the buttress thread, the dynamic load of the pipe system, pressures inside and outside of the pipe, the lateral stress of the pipe wall and so on. Especially, a geometric model is built for 3-D contact stress analysis. The distribution graph of contact stress is presented. It is indicated that the strength of the spherical connector meets the demand.展开更多
基于油田现场工况设计了Φ206.38 mm×15.8 mm C110非API尺寸套管管体及非API偏梯形螺纹接头。对套管管体强度、螺纹接头连接强度和密封性能进行了计算分析。根据力学模型并利用有限元仿真分析方法,对螺纹接头在上扣、内压及拉伸条...基于油田现场工况设计了Φ206.38 mm×15.8 mm C110非API尺寸套管管体及非API偏梯形螺纹接头。对套管管体强度、螺纹接头连接强度和密封性能进行了计算分析。根据力学模型并利用有限元仿真分析方法,对螺纹接头在上扣、内压及拉伸条件下的受力进行了分析。最后对设计的螺纹接头的连接强度和密封性能进行了实物验证。结果表明:设计的非API尺寸套管螺纹接头连接强度达到7193 kN,螺纹接头内压泄漏抗力达到77 MPa,螺纹接头连接强度和密封性能满足工况要求。展开更多
基金This research was financially supported by China Ocean Mineral Resources R &D Association (Grant No. DY105-03-02-17) .
文摘A flexible connector of lifting pipes in a deep sea mining system is designed. The buttress thread （ based on API standard） is used and foreign experience in connector design is referred to. With this kind of connector, the lifting pipe wiU only bear the axial force, free of moment. The strength of the connector is analyzed in detail, including the connecting strength of the buttress thread, the dynamic load of the pipe system, pressures inside and outside of the pipe, the lateral stress of the pipe wall and so on. Especially, a geometric model is built for 3-D contact stress analysis. The distribution graph of contact stress is presented. It is indicated that the strength of the spherical connector meets the demand.
