水下油管悬挂器锁紧结构有限元强度分析

Finite Element Strength Analysis of Locking Structure of the Subsea Tubing Hanger

水下油管悬挂器是水下采油树上的关键部件之一,由于其工作时与油气介质接触,且承受井内高压和油管串重力,需保证其与水下采油树可靠锁定。以水下油管悬挂器锁紧结构为基础,建立有限元模型,设置了载荷与边界条件、接触对和单元类型,并赋予材料属性。采用Explicit显式求解方法,完成油管悬挂器锁紧过程的模拟计算,得到各零件的最大应力值。根据API 6A标准对锁紧结构的强度和可靠性进行评估,为水下油管悬挂器的设计开发和试验、应用提供技术支撑。

Subsea tubing hanger is one of the key components in the subsea X-mas tree, since it is in contact with the oil and gas medium during operation, and bears the high pressure in the well and the weight of the tubing string, it is necessary to ensure that it is reliably locked with the X-mas tree. Based on the locking structure of the subsea tubing hanger, the finite element model was established, the load and boundary conditions, contact pairs, and element types were set up, and the material properties were assigned. The Explicit solution method was used to complete the simulation calculation of the locking process of the tubing hanger, and the maximum stress value of each part was obtained. According to the API 6 A standard, the strength and reliability of the locking structure were evaluated. It provides theoretical support for the design, tests, and application of the subsea tubing hangers.