首页> 外国专利> Pulsed neutron logging: multipurpose logging sonde for changing types of logs in the borehole without bringing the sonde to the surface

Pulsed neutron logging: multipurpose logging sonde for changing types of logs in the borehole without bringing the sonde to the surface

机译:脉冲中子测井:多功能测井仪,可在不将探空仪带到地面的情况下改变井眼中的测井类型

摘要

Disclosed is a system for nuclear well logging in which neutron pulse time duration for a high energy neutron generator and the frequency of pulses are selected downhole in the tool by use of a coded signal transmitted by the cable from the earth's surface. Separate channel systems are provided in the downhole tool for desired neutron pulse width and repetition frequency and are operated by a decoder system. Additionally, the accelerator voltage on a high energy neutron generator is controlled by a downhole switching system to selectively obtain different neutron output in response to coded signal transmissions. Moreover, provisions for obtaining different timing pulses to control gates for sampling signals generated in the tool are provided.
机译:公开了一种用于核测井的系统,在该系统中,高能中子发生器的中子脉冲持续时间和脉冲频率通过使用电缆从地球表面传输的编码信号在工具的井下进行选择。在井下工具中提供了用于期望的中子脉冲宽度和重复频率的单独的通道系统,并由解码器系统操作。另外,高能中子发生器上的加速器电压由井下开关系统控制,以响应于编码信号传输而有选择地获得不同的中子输出。此外,提供了用于获得不同的定时脉冲以控制用于对工具中产生的信号进行采样的门的措施。

著录项

  • 公开/公告号US3973131A

    专利类型

  • 公开/公告日1976-08-03

    原文格式PDF

  • 申请/专利权人 TEXACO INC.;

    申请/专利号US19740536532

  • 发明设计人 OBIE M. LANGFORD;STEVE G. MALONE;

    申请日1974-12-26

  • 分类号G21G4/02;G01V5/00;

  • 国家 US

  • 入库时间 2022-08-23 01:30:24

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