基于有限元分析的套管悬挂器颈部优化设计

心轴式套管悬挂器是石油井口中的关键设备，其颈部在工作和试压时分别承受内压和外压的作用.由于受到悬挂套管管径和连接法兰尺寸限制，悬挂器颈部壁厚较薄，因此，需对套管悬挂器颈部进行强度计算和有限元分析，验证其安全性.文章以Φ232.5 mm心轴式悬挂器为例，运用ASME标准分别计算颈部所能承受的内压和外压，并用ANSYS有限元分析计算，分别就承受内压和外压或者内外压都承受时颈部的所能承受的最高压力，从而获得经济、合理的壁厚值，并提出工程应用过程中避免颈部失效的方法.

Strength analysis and optimization design for casing hanger neck based on ANSYS

Spindle casing hanger is a key part in oil wellhead. Its neck sustains internal and external pressure in working condition and pressure test, respectively. Limited to the suspension bushing diameter and connecting flange size, hanger neck is thin in the wall thickness. Therefore, the strength calculation and the finite element method for the casing hanger neck are applied to ensure the safety of products. Taking the 232.5 mm spindle type hanger as an example, the use of ASME standard calculate neck can withstand the internal and external pressure. By using ANSYS finite element analysis and calculation, respectively under internal and external pressure or pressure inside and outside all under the neck can withstand the high pressure, and achieve the economic and reasonable wall thickness value. The method was put forward to avoid the neck failure in the process of engineering application.