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    • 8. 发明授权
    • Wavelength-selective, high temperature, near infrared photodetectors for downhole applications
    • 用于井下应用的波长选择性,高温近红外光电探测器
    • US09441480B2
    • 2016-09-13
    • US14045423
    • 2013-10-03
    • Rocco DiFoggioSebastian Csutak
    • Rocco DiFoggioSebastian Csutak
    • G01V13/00E21B49/08G01J3/10G01J3/36
    • E21B49/081E21B47/102E21B2049/085G01J3/10G01J3/36G01N21/359
    • An apparatus for estimating a property of a downhole fluid includes a carrier configured to be conveyed through a borehole penetrating the earth, a fluid extraction device disposed at the carrier and configured to extract a sample of the downhole fluid, and a probe cell having a window to receive the sample. The apparatus further includes a light source to illuminate the sample through the window with light photons, and a photodetector to receive light photons through the window that have interacted with the downhole fluid and generate a signal indicative of an amount of the received light photons. The generated signal is indicative of the property. The photodetector has an optical cavity having a semiconductor that has a difference between a valence energy band and a conduction energy band for electrons that is greater than the energy of each of the received light photons.
    • 一种用于估计井下流体的性质的装置包括构造成通过穿透地球的钻孔输送的载体,设置在载体处并构造成提取井下流体的样品的流体提取装置,以及具有窗口的探针单元 接收样品。 该装置还包括用光子照射通过窗口的样品的光源,以及光电检测器,用于接收与井下流体相互作用的通过窗口的光子,并产生指示所接收的光子的量的信号。 产生的信号表示该属性。 光电探测器具有一个具有半导体的光学腔,该半导体具有比每个接收的光子的能量大的电子的价态能带和导电能带之间的差异。