Numerical Simulation of Stinger During Offshore Pipelaying

Numerical simulation of stinger during offshore pipelaying

Dr. Zhang Xiangfeng, State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian, 116023, China Email:[email protected]

Since the requirement of oil and gas resource becomes more and more severe, the offshore industry is moving into deep waters. Different methods are adopted to install marine pipelines, such as S-lay and J-lay methods in deepwater and ultra-deepwater.

In view of deep water challenges, the offshore industry has been called to solve demanding line pipe technology aspects, to develop a new and reliable installation technology for ultra-deep waters and difficult sea bottoms, to find the suitable technological measures to tackle environmental hazards, typical of ultra-deep waters.

S-lay is useful and efficient pipe laying method, which has been proved in actual engineering, its pipe laying capability is mostly depended on the stinger the pipe lays on during laying, and it still has many problems to deal with. In our laboratory, we have received one of the National Hi-Tech Research and Development Program (863) of China, and now studying the deepwater S-lay method and the stinger.

To work on this project, the REU student is encouraged to focus on the following tasks: 1. read references about deepwater pipelay, especially S-lay 2. analyse the parameters of S-lay, such as the curvature and length of the stinger, and so on 3. monitor some important part of the stinger when laying

Reference 1. M. Kashani, R. Young. Installation Load Consideration in Ultra-Deepwater Pipeline Sizing. Journal of Transportation Engineering. 632-639. 2005 2. Det Norske Veritas (DNV). (2000). “Submarine pipeline systems.” Offshore Standards OS F101, Veritasveien 1, N-1322 Hovik, Norway. 3. M. CALLEGARI, C.B. CARINI, ete.Dynamic Models of Marine Pipelines for Installation in Deep and Ultra-Deep Waters: Analytical and Numerical Approaches. 16th AIMETA Congress of Theoretical and Applied Mechanics.2003. 4. A. C. PALMER, G.HUTCHINSON, J.W.ELLS. Configuration of Submarine Pipelines during Laying Operations. Journal of Engineering for Industry.1112- 1118. 1974 5. Enrico Torselletti, Luigino Vitali, etc. Submarine Pipeline Installation Joint Industry Project: Global Response Analysis of Pipelines during S-Laying. 25th International Conference on Offshore Mechanics and Arctic Engineering. 2006