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    • 6. 发明申请
    • METHOD AND APPARATUS FOR VIEWING A BORE HOLE
    • 用于查看钻孔的方法和装置
    • WO1992014342A1
    • 1992-08-20
    • PCT/US1991008874
    • 1991-11-27
    • HITWELL VIDEO, INC.CAMPBELL, Jerry, W.OLSSON, Mark, S.DIMASCIO, Michael, S.
    • HITWELL VIDEO, INC.
    • H04N07/18
    • H04N5/2251E21B47/0002E21B47/011G01N33/24G02B23/2484H04N5/2252H04N5/2256H04N2005/2255
    • A down hole camera apparatus (10) includes a housing (12) for holding a camera (66) and a transmitter. The camera is adapted to capture and store a picture. The transmitter transmits the stored picture to a remote location at a frequency less than 7,000 Hz. Advantageously, this makes the apparatus compatible with operation over twisted pair cables (c) of the types standard in the industry. A receiving system (67) at the remote location receives the transmitted signal. Preferably, the receiving system includes a pair of receivers (198, 199). One receiver holds and displays a transmitted picture while another receiver simultaneously receives a picture being transmitted. A controller switches the operating mode of the receivers back and forth so that the display of the earlier picture and receipt of the next picture may be continuous if desired.
    • 井眼相机装置(10)包括用于保持照相机(66)和发射器的壳体(12)。 相机适用于拍摄和存储照片。 发射机将存储的图像以小于7,000赫兹的频率发送到远程位置。 有利的是,这使得该设备与业界类型标准的双绞线电缆(c)兼容。 远程位置处的接收系统(67)接收发送的信号。 优选地,接收系统包括一对接收器(198,199)。 一个接收器保持和显示发送的图像,而另一个接收器同时接收正在发送的图像。 控制器来回切换接收器的操作模式,以便如果需要,较早图像的显示和下一图像的接收可以是连续的。