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1.发明授权Externally mounted radioactivity detector for MWD employing radial inline scintillator and photomultiplier tube 失效MWD的外置放射性检测器采用径向直列闪烁体和光电倍增管
公开(公告)号：US5061849A
公开(公告)日：1991-10-29
申请号：US485041
申请日：1990-02-26
摘要： Improved radioactivity well logging by mounting a scintillator and photomultiplier tube in a single case interfacing with a hole extending through a drill collar at the lower end of a drill string so that measurements can be made while drilling. Radioactive sources (when required for well logging) are mounted in cavities which open to the exterior of the drill collar. Light from the scintillator is coupled directly to the aligned photomultiplier tube both of which are mounted in a case extending radially within the drill collar and sealingly engaging an electronics housing within the drill collar and the drill collar wall surrounding the hole. The scintillator is of greater diameter than the photomultiplier tube. A frustoconical light pipe connects the scintillator and the photomultiplier tube, channeling scintillation in the crystal to the photomultiplier to provide an amplified detection capability over that for a scintillator having the same diameter as the photomultiplier tube.
摘要翻译： 通过将闪烁体和光电倍增管安装在与穿过钻柱下端延伸穿过钻铤的孔连接的单个壳体中来改善放射性测井，以便在钻孔时进行测量。 放射源（当测井所需时）安装在通向钻铤外部的空腔中。 来自闪烁体的光直接耦合到对准的光电倍增管，两者均安装在径向在钻铤内延伸的壳体中，并密封地接合钻铤内的电子设备壳体和围绕孔的钻铤壁。 闪烁体的直径大于光电倍增管的直径。 截头圆锥形光管连接闪烁体和光电倍增管，将晶体中的闪烁物引导到光电倍增管，以提供比具有与光电倍增管相同直径的闪烁体的放大检测能力。
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2.发明授权Method and apparatus for natural gamma ray spectrum analysis using microprocessor stripper 失效使用微处理器剥离器进行自然伽马射线谱分析的方法和装置
公开(公告)号：US4271356A
公开(公告)日：1981-06-02
申请号：US41859
申请日：1979-05-24
摘要： Gamma spectrum measurement signals received from a downhole instrument containing a scintillation counter are coupled into a multi-channel analyzer. The analyzer converts the received pulses to pulses in separate channels according to energy levels of the received measurements. The energy channels from the multi-channel analyzer are coupled to digital decoders which are set up for energy level windows for preselected elements and the total occurrence count. These outputs are coupled into a microprocessor stripper which includes storage buffers sized in accordance with the logging rate and crystal utilized in the scintillation counter. These storage registers permit filtering in addition to stripping the various energy channels of the influence radiation caused by the elements having and energy band centered around a higher energy level. After the stripping occurs, the outputs for each of the selected energy channels may be coupled into a digital recorder or into count rate meters for conversion to analog voltages for driving a chart recorder.
摘要翻译： 从包含闪烁计数器的井下仪器接收的伽马光谱测量信号耦合到多通道分析仪中。 分析仪根据接收到的测量值的能量，将接收到的脉冲转换为单独通道中的脉冲。 来自多通道分析器的能量通道耦合到数字解码器，其被设置用于预选元件的能级窗口和总出现次数。 这些输出耦合到微处理器剥离器中，微处理器剥离器包括根据记录速率和在闪烁计数器中使用的晶体尺寸的存储缓冲器。 这些存储寄存器除了剥离由元件引起的影响辐射的各种能量通道以及以更高的能量级为中心的能量带之外，还允许滤波。 在剥离发生之后，每个所选择的能量通道的输出可以耦合到数字记录器或计数速率计中，以转换为用于驱动图表记录器的模拟电压。
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