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Experimental Research on Performance Evaluation of LWD Acoustic Isolator
Author(s): 
Pages: 402-405
Year: Issue:  5
Journal: Well Logging Technology

Keyword:  随钻声波测井声波隔声体钻铤波声衰减衰减系数实验;
Abstract: 隔声体是随钻声波测井的关键部件,既要保证有足够强度以满足钻井的需要,又要有效地衰减钻铤直达波的干扰,以便测到准确的地层信号.提出了一种用随钻声波测井单极子换能器测量隔声体声衰减性能的实验方法.采用发射和接收换能器均放在隔声体两端的补偿声衰减测量方案.通过推挽式功率放大器强迫驱动发射换能器产生不同主频的声波信号沿隔声体传播,测量并计算出不同频率的钻铤直达波经隔声体前、后的声幅曲线.给出了实际随钻声波...
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