发明授权
- 专利标题： Apparatus and method for obtaining a nuclear magnetic resonance measurement while drilling
- 专利标题（中）： 钻孔时获得核磁共振测量的装置和方法
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申请号： US09186950申请日： 1998-11-05
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公开(公告)号： US06246236B1公开(公告)日： 2001-06-12
- 发明人: Martin E. Poitzsch , Steven F. Crary , Krishnamurthy Ganesan , Ralf Heidler , Bruno Luong , Peter Speier
- 申请人： Martin E. Poitzsch , Steven F. Crary , Krishnamurthy Ganesan , Ralf Heidler , Bruno Luong , Peter Speier
- 主分类号： G01V300
- IPC分类号： G01V300
摘要：
The present invention is directed to a nuclear magnetic resonance logging-while-drilling tool. The tool comprises a drill bit, drill string, a plurality of RF antennas, and at least one gradient coil. The tool further comprises a plurality of magnets that are polarized in a direction parallel to the longitudinal axis of the tool but opposite to each other. The configuration of magnets and antennas provides for at least two NMR regions of investigation.
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