发明授权
- 专利标题： Gamma ray spectral tool for borehole use
- 专利标题（中）： 用于钻孔使用的伽马射线工具
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申请号： US388844申请日： 1982-06-16
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公开(公告)号： US4504736A公开(公告)日： 1985-03-12
- 发明人: Harry D. Smith, Jr. , Tony M. Small , John G. Deaton
- 申请人： Harry D. Smith, Jr. , Tony M. Small , John G. Deaton
- 申请人地址： OK Duncan
- 专利权人： Halliburton Company
- 当前专利权人： Halliburton Company
- 当前专利权人地址： OK Duncan
- 主分类号： E21B47/01
- IPC分类号： E21B47/01 ; G01V5/06 ; G01V5/04
摘要：
This invention relates to a logging tool housing construction for use with gamma ray logging devices. The tool housing is constructed of materials designed for maximum transmission of low energy natural gamma ray energies (E=150-300 Kev). The housing material which encloses a gamma ray detector is a tubular, filament wound graphite composition and has a tubular metal sleeve for wear protection. The core and tubular metal sleeve are constructed and interconnected to meet mechanical and pressure requirements for oil well logging use.
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