发明授权
- 专利标题: Downhole tool and method
- 专利标题(中): 井下工具及方法
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申请号: US13575895申请日: 2011-02-04
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公开(公告)号: US09260941B2公开(公告)日: 2016-02-16
- 发明人: James Linklater
- 申请人: James Linklater
- 申请人地址: GB Aberdeen
- 专利权人: M-I Drilling Fluids UK Limited
- 当前专利权人: M-I Drilling Fluids UK Limited
- 当前专利权人地址: GB Aberdeen
- 优先权: GB1001917.2 20100205
- 国际申请: PCT/GB2011/050191 WO 20110204
- 国际公布: WO2011/095816 WO 20110811
- 主分类号: E21B31/06
- IPC分类号: E21B31/06 ; E21B37/00
摘要:
A cleaning tool (1) for use in cleaning ferrous material from a wellbore has a magnetic cleaning functionality by provision of magnets (5) in an Halbach array on a downhole tool component of a workstring. The Halbach array may be an Halbach cylinder positioned on a mandrel wherein the magnetic field is external to the cylinder with substantially zero magnetic field within the tool.
公开/授权文献
- US20130000884A1 DOWNHOLE TOOL AND METHOD 公开/授权日:2013-01-03