Study of Characteristics of Lateral Vibration of the Riser in Deepwater Drilling Condition

doi:10.11885/j.issn.16745086.2014.08.05.02

Abstract

Abstract: Study of vibration of riser is rarely about lateral vibration of the riser in deepwater drilling condition. We built the fluid-structure interaction model for lateral vibration of the riser using Newton's method, and solve the model using the differential transform method(DTM). We also analyzed the effects of displacement of drilling fluid, fluid density, tension ratio, the riser's structure and other factors on the natural frequency of lateral vibration of risers. The results show that: the presence of drilling fluid will reduce the natural frequency of horizontal vibration of deepwater riser; natural frequency of the lateral vibration of the riser increases when the density of the drilling fluid decreases and when the tension ratio increase; tension ratio is a very serious impact on the natural frequency of the lateral vibration of the riser. The effect of the drilling fluid displacement and drill string size for the lateral vibration of the riser can be neglected under drilling conditions. The study results can be used to guide the operations and to optimize process parameters of deepwater drilling.

Key words: deepwater drilling, riser, lateral vibration, fluid-structure interaction, natural frequency

CLC Number:

TE951

LIU Qingyou, ZHU Junkai, MAO Liangjie. Study of Characteristics of Lateral Vibration of the Riser in Deepwater Drilling Condition[J]. 西南石油大学学报(自然科学版), 2016, 38(5): 1-8.

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