水下井口密封圈的结构优化与负载响应分析
Structural optimization and load response analysis of subsea wellhead sealing gaskets
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- 引用格式:
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李勇,杨旭,蒋永义,黄荣吉,李伟,邱全平.水下井口密封圈的结构优化与负载响应分析[J].天然气与石油,2025,43(2):90-98.doi:10.3969/j.issn.1006-5539.2025.02.012
LI Yong, YANG Xu, JIANG Yongyi, HUANG Rongji, LI Wei, QIU Quanping.Structural optimization and load response analysis of subsea wellhead sealing gaskets[J].Natural Gas and Oil,2025,43(2):90-98.doi:10.3969/j.issn.1006-5539.2025.02.012
- DOI:
- 10.3969/j.issn.1006-5539.2025.02.012
- 作者:
- 李勇1,2 杨旭1,2 蒋永义1,2 黄荣吉1,2 李伟1,2 邱全平1,2
LI Yong1,2, YANG Xu1,2, JIANG Yongyi1,2, HUANG Rongji1,2, LI Wei1,2, QIU Quanping1,2
- 作者单位:
- 1. 中海油能源发展股份有限公司工程技术分公司, 天津 300456 2. 海南省深海深层能源工程重点实验室, 海南 海口 570100
1. CNOOC Ener Tech-Drilling & Production Co., Tianjin, 300456, China; 2. Key Laboratory of Deep Sea Deep Formation Energy Engineering of Hainan Province, Haikou, Hainan, 570100, China
- 关键词:
- 井口密封圈;井口连接器;结构优化;密封特性;负载响应
Wellhead sealing gasket; Wellhead connector; Structural optimization; Sealing property; Load response
- 摘要:
- 水下井口与井口连接器通常采用金属密封圈建立生产作业与外部环境之间的密封通道。为研究水下井口密封圈的结构特性,以及不同结构形式的密封圈对环境负载的响应特性，针对18-3/4 in(1 in=25.4 mm)10 K井口规格,基于有限元分析软件Abaqus的有限元分析方法,确定了常用VX钢圈的优选结构参数,根据密封特性优化了钢圈结构,并对不同结构形式的密封圈进行负载响应分析。结果表明:VX钢圈优选密封锥面角度θ为22.7°~22.8°,优选锥顶直径D为507.8~508.4 mm;VAX钢圈较VX钢圈能明显改善密封型面上的接触应力与应力分布,但抗负载能力较弱;密封型面上的环槽能有效建立钢圈主、次双重密封,并增加主密封接触宽度,但不能提高钢圈的负载能力;井口连接器负载能力范围内,环境负载对钢圈的密封性能影响较小。分析结果可为不同井口规格密封圈的设计与应用提供方法和数据参考。
Subsea wellhead and wellhead connectors usually utilize metal sealing gaskets to establish a sealed channel between production operation and the external environment. In order to study the structural characteristics of subsea wellhead sealing gaskets and the response characteristics of different gasket structural forms under environmental loads, this paper focuses on the 18-3/4 in(1 in=25.4 mm) 10 K wellhead specifications. Using the finite element analysis method based on ABAQUS, the optimal structural parameters for the commonly used VX sealing gasket were determined. The gasket structure was then optimized according to its sealing characteristics, and the load response analysis was conducted for various gaskets structural forms. The results show that the optimal sealing cone angle θ for the VX sealing gasket is 22.7°~22.8°, and the optimal cone top diameter D is 507.8~508.4 mm. The VAX sealing gasket can significantly improve the contact stress and stress distribution on the sealing surface compared with VX sealing gaskets, although its load-bearing capacity is weaker. The annular groove on the sealing surface can effectively enable the sealing gasket to establish primary and secondary dual seals and increase the contact width of the primary seal, but do not improve gasket’s load capacity. Within the load capacity range of the wellhead connector, environmental loads have minimal impact on the sealing performance of the sealing gasket.
