Study and Test of Coupled Axial and Transverse Vibrations on Drillpipe for Rotary Drilling Rig

Abstract:

In order to more accurately predict the vibration characteristics of drillpipe for rotary drilling rig, dynamic model of coupled axial and transverse vibrations was established based on Hamilton variation principle and finite element theory after discussing the vibration mechanism of drillpipe. The Newmark-β method was adopted to solve the dynamic equation and the simulated vibration responses of drillpipe were calculated. The results show that the axial models yield harmonic motion. The axial displacement is quite small and the maximum amplitude of the first section is about 6×10^-4 m. The transverse displacement is much larger than the axial displacement and the maximum transverse amplitude of the first section is about 0.03 m. The drillpipe of the first section of rotary drilling rig was tested. Comparing simulation results and test results, trends of the responses of axial displacement and transverse displacement have a good agreement and the simulation model is verified by the experiment.

• Periodical: Applied Mechanics and Materials (Volume 472)
• Pages: 73-78
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.472.73
• Online since: January 2014
• Authors: Xin Xin Xu, Sheng Jie Jiao, Jian Lian Cheng, Jin Ping Li
• Keywords: Coupled Vibration, Drillpipe, Finite Element, Rotary Drilling Rig

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