井下振动环境分析与模拟

Intelligent-drilling downhole tools and instruments produce complex vibrations during drilling. Severe or long-term vibration will cause circuit failure of downhole instruments and mechanical fatigue damage of drilling collars , which will cause drilling accidents and increase drilling costs. In order to verify the adaptability and reliability of the vibration environment of the downhole instrument , it is necessary to carry out systematic research on the failure mechanism , data acquisition and analysis of downhole conditions , testing and experiments , fully discover the potential faults of the instrument in the laboratory , and continuously iterate and upgrade to improve the reliability of the instrument. In this paper , the actual vibration environment data are collected by the self-developed downhole vibration and shock recording instrument in the actual drilling. After analyzing and processing the collected data , the vibration test conditions in three directions are formulated. The first domestic dual parallel excitation vibration test system for downhole instrument testing was customized and developed. The co-excited vibration test method based on two vibration equipment is studied , and the real simulation of downhole vibration environment under laboratory conditions is realized. The systematic downhole vibration test platform effectively supports the high-quality research and development of downhole tools and instruments.