发明授权
US06297639B1 Method and apparatus for directional well logging with a shield having sloped slots
有权
用于具有倾斜槽的屏蔽件进行定向测井的方法和装置
- 专利标题: Method and apparatus for directional well logging with a shield having sloped slots
- 专利标题(中): 用于具有倾斜槽的屏蔽件进行定向测井的方法和装置
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申请号: US09452576申请日: 1999-12-01
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公开(公告)号: US06297639B1公开(公告)日: 2001-10-02
- 发明人: Brian Clark , Richard A. Rosthal , Dean M. Homan , Dzevat Omeragic , Stephen D. Bonner , Scott S. Chesser , Thomas D. Barber
- 申请人: Brian Clark , Richard A. Rosthal , Dean M. Homan , Dzevat Omeragic , Stephen D. Bonner , Scott S. Chesser , Thomas D. Barber
- 主分类号: G01V330
- IPC分类号: G01V330
摘要:
Methods and apparatus for making directional measurements of earth formations surrounding a borehole. New antenna coil shield designs are utilized to provide selective attenuation of at least one electromagnetic energy field component as the component interacts with the shield. The new shields are implemented in several downhole tool configurations to provide azimuthally focused formation measurements. In effect, the new shield filters interacting electromagnetic energy field components to pass those components corresponding to a magnetic dipole oriented at an angle from the tool axis. The shields thereby alter a coil's envelope of influence to electromagnetic energy. The new shields also form part of a system for making directional measurements while drilling.