Use of dual waves for the elimination of reverberations in drill strings

被引:9
|
作者
Poletto, F [1 ]
机构
[1] OGS, Ist Nazl Oceanog & Geofis Sperimentale, I-34010 Trieste, Italy
来源
关键词
Drill strings;
D O I
10.1121/1.1427360
中图分类号
O42 [声学];
学科分类号
070206 ; 082403 ;
摘要
Drill-string waves can be used to transmit acoustic and seismic information from the bottom hole to the surface. Because the drill string is a heterogeneous assembly, the investigated signal is disturbed by reverberations. Removal of the reverberations generated in the drill string is obtained by measuring acceleration and strain, which have opposite reflection coefficients and are used as dual waves. Addition of the dual waves makes it possible to remove part of the drill-string reflections and improve the signal-to-noise ratio. (C) 2002 Acoustical Society of America.
引用
收藏
页码:37 / 40
页数:4
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