Apparatus for receiving downhole acoustic signals
    1.
    发明授权
    Apparatus for receiving downhole acoustic signals 有权
    用于接收井下声信号的装置

    公开(公告)号:US06956791B2

    公开(公告)日:2005-10-18

    申请号:US10354157

    申请日:2003-01-28

    IPC分类号: E21B47/16 G01V11/00 H04V9/00

    CPC分类号: E21B47/16 G01V11/002

    摘要: The invention relates to an apparatus for receiving downhole acoustic signals, processing the signals into electric signals, then transmitting the signals wirelessly to a remote above-surface monitoring station. The apparatus is mountable to an above-surface rotatable component used in borehole application. The apparatus includes an instrument housing, and a clamping assembly attached to the housing and having sufficient length and flexibility to enable the apparatus to surround the perimeter of the rotatable component.

    摘要翻译: 本发明涉及一种用于接收井下声信号,将信号处理成电信号,然后将信号无线地传输到远程上表面监测站的装置。 该装置可安装到用于钻孔应用中的上表面可旋转部件。 该装置包括一个仪器壳体和一个附接到壳体上的夹持组件,并且具有足够的长度和柔性,使装置能够围绕可旋转部件的周边。

    Circuit to mitigate transformer shorted turn
    3.
    发明授权
    Circuit to mitigate transformer shorted turn 有权
    电路减轻变压器短路

    公开(公告)号:US06816053B2

    公开(公告)日:2004-11-09

    申请号:US10402989

    申请日:2003-04-01

    IPC分类号: H01F2724

    摘要: A dual transformer design, each transformer having at least a primary winding and a secondary winding disposed on a core means, wherein the core means is circumferentially disposed about an inner housing means, and the whole structure located within an outer housing. The primary winding of one transformer of said pair of transformers is electrically coupled to the primary winding of the other in a manner such as to cause induced eddy currents from one transformer to be of a magnitude and direction so as to substantially cancel the induced eddy currents from the other transformer.

    摘要翻译: 双变压器设计,每个变压器至少具有初级绕组和设置在芯装置上的次级绕组,其中所述芯装置围绕内部壳体装置周向地设置,并且整个结构位于外部壳体内。 所述一对变压器的一个变压器的初级绕组以一种方式电耦合到另一个变压器的初级绕组,以便使来自一个变压器的感应涡流成为一个幅度和方向,以便基本上消除感应的涡流 从另一个变压器。