Study on the design of offshore lifting frame for large jacket

Author of the article:LIU Rui

Author's Workplace：Offshore Oil Engineering Co., Ltd., Tianjin, 300451, China

Key Words：Lifting frame; Trunnion; Large jacket; ANSYS

Abstract：A lifting frame structure design scheme is introduced in this paper to solve the difficulties in the design of lifting point for large offshore structure, the high procurement cost of the hydraulic clasp, and the high risk of jacket lifting implementation. The structural design plan, construction, and offshore installation process and key points of the lifting frame are elaborated in this paper. Based on SACS and ANSYS analytical software, the strength analysis and code verification on the main structure and trunnion of the lifting frame are carried out, the feasibility of the lifting frame structural design scheme is verified and the key structural design features and main points are summarized. According to the analysis result, it is shown that the lifting frame is suitable for offshore lifting of large jackets. These results can be used as a reference for the design, fabrication and offshore installation of future large offshore jacket projects of the same nature.