Research on structural dynamic response characteristic of capping stack landed guiding system

doi:10.16265/j.cnki.issn1003-3033.2022.08.1678

Abstract

Abstract:

In order to solve the problems of large lateral deviation and difficulty to be smoothly landed and installed of deep subsea capping stack, the operation mode based on the land of guiding system. is proposed. A coupling dynamic model of the platform, steering frame, capping stack system was established with nonlinear time domain finite element software OrcaFlex. The structural dynamic response characteristics of land guiding systems was explored, and the influence of sea surface velocity, direction, the device weight and other parameters on the land and installation process of the system was analyzed. The calculation results of the example show that the maximum lateral deviation of the guiding system is 3.68 m and the rotation angle of the capping stack is less than 1° in the whole land and installation process, which verifies that the guiding system has a strong constraint on landing. Meanwhile, the structural strength of the checked guiding system meets the requirements of safe operation. The sea surface velocity and the capping stack weight have an obvious influence on the stress of the landing drill pipe, while the direction of the sea current has a great influence on the contact force of the guide frame in the splash zone. But all of these don't affect the smooth land and installation of capping stack.

Key words: capping stack, land guiding system, structural dynamic response, sea surface velocity, current direction

ZHU Jingyu, CHEN Guoming, LIU Kang, ZHAO Yipei. Research on structural dynamic response characteristic of capping stack landed guiding system[J]. China Safety Science Journal, 2022, 32(8): 194-200.

Figures/Tables 9

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钻杆	数值	应急封井装置	数值
外径/mm	168.3	长×宽×高/ m×m×m	6×3.5×6
壁厚/mm	9.3	质量/kg	1.2×10⁵
杨氏模量/GPa	210	重心位置/m	(0, 0, 3)
泊松比	0.3	拖曳力系数	1.32
拖曳力系数	1.2	惯性力系数	2.0
惯性力系数	2.0

水深/ m	变量
水深/ m	应急封井装置转角/(°)	导向架接触力/kN
20	0.46	21.38
300	0.08	2.03
600	0.15	2.39
900	0.32	3.18
1 150	0.48	3.20