公开(公告)号：US20020105331A1

公开(公告)日：2002-08-08

申请号：US10007351

申请日：2001-11-07

发明人： Guenter W. Brune ,  John E. Mercer

IPC分类号： G01V003/08 ,  G01V003/10

CPC分类号： G01V3/081 ,  E21B47/02 ,  E21B47/02224 ,  E21B47/024 ,  E21B47/0905 ,  E21B47/12 ,  G01V3/08

摘要： Arrangements, apparatus and associated methods are described for use in a multi-frequency boring tool locating system. The boring tool includes a transmitter for transmitting a locating signal at two or more selectable frequencies. One set of above ground procedures may be applied to the transmitter in order to change the frequency of the boring tool transmitter. Another set of procedures is applicable for changing the frequency during below ground drilling operations, for example, by subjecting the boring tool to a predetermined roll orientation sequence. An enhanced portable locator operates in a manual or automatic mode to receive locating frequency information transmitted from the boring tool transmitter including frequency updates. Boring tool transmitter, as well as above ground locator shutdown/restart procedures are described relating to multi-frequency operation. A tone detector is described which implements one or more digital match filters.

摘要翻译： 描述了用于多频钻孔定位系统中的布置，装置和相关方法。 无聊工具包括用于以两个或多个可选频率发送定位信号的发射器。 可以将一组以上的地面程序应用于变送器，以便改变镗刀发送器的频率。 另一组程序适用于在地下钻孔作业中改变频率，例如通过使钻孔工具进行预定的辊定向顺序。 增强的便携式定位器以手动或自动模式操作以接收从钻孔工具发射器发送的定位频率信息，包括频率更新。 镗刀工具变送器以及地面定位器停机/重启程序都涉及多频操作。 描述了实现一个或多个数字匹配滤波器的音调检测器。

公开(公告)号：US20010038287A1

公开(公告)日：2001-11-08

申请号：US09781667

申请日：2001-02-12

发明人： Bijan K. Amini

IPC分类号： G01V003/10

CPC分类号： G01V3/28

摘要： A method and apparatus for transmitting electromagnetic flux through well casing or similar materials to measure or detect the electrical resistivity of media in the surrounding geologic formation. The invention creates a magnetically transparent region in an electromagnetic barrier material, e.g., ferromagnetic metal well casing. It further incorporates a transmitter sending an electromagnetic wave at a selected frequency and strength, and a receiver to measure returning signals. The method and apparatus may also incorporate the controlled use of electromagnetic barrier material that can be wholly or partially saturated with electromagnetic energy in order that the electromagnetic wave transmitted by the invention can be focused in a controlled manner.

摘要翻译： 一种用于通过井壳或类似材料传输电磁通量以测量或检测周围地质层中介质的电阻率的方法和装置。 本发明在电磁屏障材料（例如铁磁金属阱套管）中产生磁性透明区域。 它还包括以选定的频率和强度发送电磁波的发射机，以及用于测量返回信号的接收机。 所述方法和装置还可以包括电磁屏障材料的受控使用，所述电磁屏障材料可以全部或部分地被电磁能饱和，以使本发明传输的电磁波可以以受控的方式聚焦。