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    • 10. 发明公开
    • NON-PLANAR ANTENNAE FOR DIRECTIONAL RESISTIVITY LOGGING
    • NICHT PLANARE ANTENNENFÜRDIREKTIONALE WIDERSTANDSPROTOKOLLIERUNG
    • EP2411628A4
    • 2017-08-16
    • EP10756767
    • 2010-03-24
    • SERVICES PÉTROLIERS SCHLUMBERGERSCHLUMBERGER HOLDINGSSCHLUMBERGER TECHNOLOGY BVPRAD RES & DEV LTD
    • WANG TSILI
    • E21B47/01E21B47/10G01V3/28
    • E21B47/102E21B47/01G01V3/28
    • A downhole measurement tool includes at least one non-planar antenna configured for transmitting and/or receiving electromagnetic radiation. The non-planar antenna includes at least one non-planar loop of antenna wire deployed about a tool body. In one exemplary embodiment, the non-planar antenna may be thought of as being bi-planar in that it includes first and second sections defining first and second intercepting geometric planes. In another exemplary embodiment, the axial separation between the non-planar loop of antenna wire and a circular centerline of the antenna varies substantially sinusoidally with respect to an azimuth angle about the circumference of the tool. Exemplary non-planar antennae in accordance with the invention may be advantageously configured to transceive substantially pure x-, y-, and z-mode radiation.
    • 井下测量工具包括至少一个配置用于发射和/或接收电磁辐射的非平面天线。 非平面天线包括围绕工具主体部署的至少一个非平面的天线导线环。 在一个示例性实施例中,非平面天线可以被认为是双平面的,因为它包括限定第一和第二截取几何平面的第一和第二部分。 在另一个示例性实施例中,天线导线的非平面环与天线的圆形中心线之间的轴向间隔相对于围绕工具圆周的方位角基本上正弦地变化。 根据本发明的示例性非平面天线可以有利地被配置为收发基本上纯粹的x-,y-和z-模式辐射。