公开(公告)号：US6057687A

公开(公告)日：2000-05-02

申请号：US58981

申请日：1998-04-13

申请人： John E. Mercer

发明人： John E. Mercer

IPC分类号： E21B47/022 ,  E21B47/024 ,  G01C9/06 ,  G01C9/20 ,  G01V3/11 ,  G01V3/15 ,  G01V3/165 ,  G01L3/11 ,  H04B13/02 ,  G01L3/165

CPC分类号： G01V3/08 ,  E21B47/02216 ,  E21B47/02224 ,  E21B47/024 ,  G01C9/06 ,  G01C9/20 ,  G01V3/15 ,  G01V3/165

摘要： A boring tool contains an arrangement for producing a dipole magnetic field. The boring tool is steered through the ground using a boring machine. The position of the boring tool, during its movement through the ground, is established by an above ground receiver in cooperation with and responsive to the magnetic field. The receiver is configured to operate alternatively in first and second modes. When operating the receiver in the first mode positioned above ground, the receiver includes an arrangement responsive to the magnetic field for determining the location of the boring tool as the boring tool moves along a path from a first point to a second point. When operating the receiver in the second mode positioned at a fixed point, the receiver includes an arrangement responsive to the magnetic field for establishing between the boring tool and the receiver a homing path along which the boring tool is steered toward the fixed point.

摘要翻译： 一种钻孔工具包含用于产生偶极磁场的装置。 使用镗孔机将钻孔工具转向地面。 钻孔工具在其通过地面的移动期间的位置由与地面接收器协调并响应于磁场建立。 接收器被配置为在第一和第二模式中交替地操作。 当处于位于地面上方的第一模式中操作接收机时，接收机包括响应于磁场的装置，用于在镗刀沿着从第一点到第二点的路径移动时确定钻孔工具的位置。 当接收机以位于固定点的第二模式操作时，接收机包括响应于磁场的装置，用于在钻孔工具和接收器之间建立钻孔工具朝着固定点转向的归位路径。