Invention Grant
- Patent Title: Demagnetizer to eliminate residual magnetization of wellbore wall produced by nuclear magnetic resonance logs
- Patent Title (中): 消磁器消除由核磁共振测井仪产生的井筒壁的残余磁化
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Application No.: US12197793Application Date: 2008-08-25
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Publication No.: US07969150B2Publication Date: 2011-06-28
- Inventor: Homero C. Castillo , Thomas Kruspe
- Applicant: Homero C. Castillo , Thomas Kruspe
- Applicant Address: US TX Houston
- Assignee: Baker Hughes Incorporated
- Current Assignee: Baker Hughes Incorporated
- Current Assignee Address: US TX Houston
- Agency: Mossman Kumar & Tyler PC
- Main IPC: G01V3/00
- IPC: G01V3/00 ; G01V3/18
Abstract:
An apparatus and method is disclosed for measuring a parameter of an earth formation surrounding a wellbore. A Nuclear Magnetic Resonance (NMR) tool and at least one second tool are conveyed in the wellbore on a wireline, the NMR tool having a magnetic influence on a region of the wellbore. The magnetic influence of the NMR tool is removed from the region of the wellbore using a demagnetizing device. The parameter of the earth formation is measured using the at least one second tool. A second demagnetizing device may be used to remove the magnetic influence of the at least one second tool from the region of the wellbore.
Public/Granted literature
- US20090015254A1 Demagnetizer to Eliminate Residual Magnetization Produced by Nuclear Magnetic Resonance Logs Public/Granted day:2009-01-15
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