Experimental study on the influence of vibration on the vertical bearing capacity of a surface conductor in deep-water drilling

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Journal of Vibration and Shock ›› 2025, Vol. 44 ›› Issue (10) : 116-126.

VIBRATION THEORY AND INTERDISCIPLINARY RESEARCH

Experimental study on the influence of vibration on the vertical bearing capacity of a surface conductor in deep-water drilling

WANG Liyan1，YIN Yiyong*1，QI Linshan1，LIU Guodong1，LI Jun1，XIA Xiujian2，BAI Hanqin2

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Abstract

In order to accelerate the improving speed of vertical bearing capacity of the surface conductor after it is sprayed to the target layer, and shorten its setting time, a vibrating solid pipe process was proposed, and the influence of vibration parameters on the vertical bearing capacity of the pipe in this process was studied. Firstly, based on the analysis of the mechanical process in the process of vibrating solid conduit, the similarity relationship of the simulation test of the vibrating solid conduit system was deduced by using the dimensional analysis method. Secondly, a simulation test platform for the vertical bearing capacity of the conduit was designed and built. The influence law and significance of different vibration frequency and vibration time on the vertical bearing capacity of the pipe were obtained by using the control variable method and the variance analysis method. Finally, a finite element model of the prototype conduit-clay was established, and based on this model, the influence of vibration on the vertical bearing capacity enhancement of the prototype conduit was analyzed. The results of indoor simulation test and finite element numerical simulation both indicate that vibration will accelerate the improvement of the vertical bearing capacity of the conduit. However, there are some deviations between the vibration parameters required for the prototype conduit obtained from simulation experiments and those in practical applications. This is due to the fact that indoor simulation experiments were conducted under a 1g gravity field, which resulted in differences in parameters between the model soil and the prototype deep-water soil. Therefore, this study provides a new idea for accelerating the improvement of the vertical bearing capacity of conduits and has certain engineering value. This study provides new ideas for accelerating the vertical bearing capacity of conduits and has certain engineering value.

Key words

deep-water drilling / surface conductor / setting time / vibration consolidation / bearing capacity

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WANG Liyan1, YIN Yiyong1, QI Linshan1, LIU Guodong1, LI Jun1, XIA Xiujian2, BAI Hanqin2. Experimental study on the influence of vibration on the vertical bearing capacity of a surface conductor in deep-water drilling[J]. Journal of Vibration and Shock, 2025, 44(10): 116-126

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