发明申请
- 专利标题: Nuclear Magnetic Resonance Tool With External Magnets
- 专利标题(中): 带磁铁的核磁共振工具
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申请号: US13885453申请日: 2011-11-16
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公开(公告)号: US20150035529A1公开(公告)日: 2015-02-05
- 发明人: Timothy Hopper , David T. Oliver , Anatoly Dementyev
- 申请人: Timothy Hopper , David T. Oliver , Anatoly Dementyev
- 国际申请: PCT/US2011/060940 WO 20111116
- 主分类号: G01V3/32
- IPC分类号: G01V3/32 ; E21B47/00
摘要:
Methods and systems are provided that enable logging while drilling NMR measurements to be made with magnets placed outside of the drill collar and magnetically permeable members to control the magnetic field gradient. A set of magnets can be disposed on and/or embedded on a drill collar, with an antenna disposed axially therebetween. Alternatively, a set of magnets and an antenna disposed therebetween can be disposed on a sleeve that is slid onto a recess in a drill collar. Additionally, a permeable member can be axially positioned between the set of magnets for affecting the depth of investigation.
公开/授权文献
- US09841529B2 Nuclear magnetic resonance tool with external magnets 公开/授权日:2017-12-12