发明授权
- 专利标题: Active noise cancellation through the use of magnetic coupling
- 专利标题(中): 通过使用磁耦合来主动消除噪声
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申请号: US12646694申请日: 2009-12-23
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公开(公告)号: US07911877B2公开(公告)日: 2011-03-22
- 发明人: Douglas J. Patterson , Xiao Ming Tang , Alexei Bolshakov
- 申请人: Douglas J. Patterson , Xiao Ming Tang , Alexei Bolshakov
- 申请人地址: US TX Houston
- 专利权人: Baker Hughes Incorporated
- 当前专利权人: Baker Hughes Incorporated
- 当前专利权人地址: US TX Houston
- 代理机构: Mossman Kumar & Tyler PC
- 主分类号: G01V1/00
- IPC分类号: G01V1/00
摘要:
Passive suppression of casing signals is used to improve the ability to measure formation velocities. Passive suppression includes the use of a magnet slidably coupled to the casing.
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