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    • 25. 发明授权
    • Method and device for emitting radial seismic waves in a material medium by electromagnetic induction
    • 用于通过电磁感应在材料介质中发射径向地震波的方法和装置
    • US06595285B2
    • 2003-07-22
    • US09828966
    • 2001-04-10
    • Jean-Claude DuboisPatrick Meynier
    • Jean-Claude DuboisPatrick Meynier
    • G01V1053
    • G10K9/12G01V1/02G01V1/04G01V1/52
    • A method and device for emitting radial seismic waves in a material medium by electromagnetic induction, used notably for generating seismic waves in cased or uncased wells or in a water mass is disclosed. Emission of radial waves is essentially obtained by radially expanding a metal tube (1) under the effect of a magnetic pressure generated by electromagnetic induction with elastic waves being created in the medium under the effect of this expansion. The magnetic pressure is obtained by connecting a coil (2) in line with the tube to a current generator (3). The winding pitch of coil (2) can be constant or variable. Tube (1) can for example be added into a well or hole or it can be a tube portion of a cased well.
    • 公开了一种用于通过电磁感应在材料介质中发射径向地震波的方法和装置,其特别用于在套管或未封装的井中或在水质中产生地震波。 径向波的发射基本上是通过在由该膨胀的作用下在介质中产生的弹性波的电磁感应产生的磁力的作用下使金属管(1)径向膨胀而获得的。 通过将与管一致的线圈(2)连接到电流发生器(3)来获得磁压力。 线圈(2)的绕组间距可以是恒定的或可变的。 管(1)可以例如被添加到井或孔中,或者其可以是套管井的管部分。