Abstract
The top tension riser (TTR) pipe-in-pipe system which includes outer pipes and inner pipes is widely used in offshore oil and gas development for production, water injection, completion, drilling and gas lift. Due to the complex external excitation and the violent collision between the outer pipe and the inner pipe, it is necessary to perform the vibration analysis for the production safety and service life of the entire TTR system. In this paper, a novel independent dual-pipe centralizer layout scheme based on the Absolute Difference Filter Method (ADFM) is generated for vibration mitigation. Another layout scheme based on multi-pipe model is provided for comparison. Result illustrates that the independent dual-pipe scheme is precise and economizes the cost of calculation. Dynamic analysis of a typical TTR pipe-in-pipe system considering the independent dual-pipe layout scheme is implemented via ABAQUS. Dynamic responses are discussed and compared with non-centralizer scheme and equidistant layout scheme. Results demonstrate that independent dual-pipe layout scheme has the best vibration mitigation effect.
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