测井技术2011，Vol.35Issue(5)：402-405,4.
随钻声波测井隔声体性能评价实验研究
Experimental Research on Performance Evaluation of LWD Acoustic Isolator
摘要
Abstract
The design of LWD acoustic isolator is crucial to LWD tool development. The isolator should effectively attenuate the direct collar wave while maintaining sufficient strength to meet the drilling requirement. An experimental method is designated to measure the isolator's sound attenuation properties by using the realistic LWD monopole transducer. By placing transmitting and receiving transducers on opposite sides of the isolator, the method measures the compensatory attenuation of the sound wave through the isolator. The transmitting transducer is energized by a Push-Pull Power Amplifier at various frequencies in order to determine the isolator's performance as a function of frequency. The direct waves along drill collar before and after the isolator are recorded and the amplitude curves are calculated. This paper presents the laboratory measurement results for an LWD isolator joint. The measured sound attenuation property is characterized by the best sound insulation stop band and the maximum attenuation coefficient of the I-solator.关键词
随钻声波测井/声波隔声体/钻铤波/声衰减/衰减系数/实验Key words
acoustic logging while drill/ acoustic isolator/ collar wave/ wave attenuation/ attenuation coefficient/ experiment分类
天文与地球科学引用本文复制引用
苏远大,庄春喜,邓林,李玉霞,秦玉坤..随钻声波测井隔声体性能评价实验研究[J].测井技术,2011,35(5):402-405,4.基金项目
国家高技术研究发展计划(863计划)(2007AA06Z232) （863计划）
国家油气重大专项(2011ZX05020-002) （2011ZX05020-002）
中央高校基本科研业务费专项资金资助 （）
