Structure Optimization and Performance Analysis of Subsea High Pressure Wellhead Metal Seal

Wensheng Xiao, Chao Hou, Jian Liu*, Bo Luan, Hongyan Wang
College of Mechanical and Electronic Engineering, China University of Petroleum, Qingdao, Shandong, 266580, China.

© 2015 Xiao et al

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: ( This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


Security and reliability are the main focus of annular metal seal assembly. It is concluded that the factors influence sealing performance of annular metal seal assembly most in view of working conditions of annular metal seal assembly. Taking major influencing factors with response surface method (RSM) analysis, and determining coefficient of regression analysis with finite element method (ANSYS) experiment. Second-order corresponding model is established and the best corresponding interval is concluded. Getting the reasonable values of bulge radius r and loading F on the premise of guarantee the y value and providing theoretical guidance for field operation combined with metal sealing seal principles and experimental research.

Keywords: Subsea high pressure wellhead , metal seal, annular metal seal assembly, design-expert, RSM.