By conducting a search of international patents of Steel Catenary Riser,the patent technology in the field of SCR stress joints has been analyzed in panoramic situation and key technology.The results show that a total of 150 patents related to steel catenary riser stress joints have been applied for in the world;there are only 18 patents in the field of stress joints in China.The structural form of stress joints is mainly divided into movable joints and fixed joints,and movable joints are divided into two categories:bracket type and hanging type.Fixed joints are categorized as two-part,tapered and other types.There are 15 patents related to titanium alloy stress joints,it is recommended to focus on patent US10023942B2 and patent US6467545B1.
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