发明申请
- 专利标题： Measuring mud flow velocity using pulsed neutrons
- 专利标题（中）： 使用脉冲中子测量泥浆流速
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申请号： US10539465申请日： 2003-11-21
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公开(公告)号： US20060254350A1公开(公告)日： 2006-11-16
- 发明人: Peter Wraight
- 申请人： Peter Wraight
- 优先权： EP02293280.0 20021231
- 国际申请： PCT/EP03/13142 WO 20031121
- 主分类号： G01V5/12
- IPC分类号： G01V5/12 ; E21B47/00 ; E21B47/10 ; E21B47/08 ; E21B49/08
摘要：
The invention relates to methods and apparatus for determining downhole mud flow rates and other downhole parameters. A method for determining a downhole parameter includes operating a pulsed neutron generator (6), pulsing the pulsed neutron generator (6) off, detecting a substantially unactivated drilling fluid slug at a known distance (d) from the pulsed neutron generator (6), and determining a time-of-flight (t) for the unactivated drilling fluid slug to travel from the pulsed neutron generator (6) to a detection point.
公开/授权文献
- US07669468B2 Measuring mud flow velocity using pulsed neutrons 公开/授权日：2010-03-02
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