Design Of Receiving Subsystem In Well Parameter Telemetry System

The main jobs of the parameter telemetry system for oil wells is the signals transmitting and processing during the course the parameters of the temperature and the pressure under the bottom of the oil wells being taken to the mouth of the well by the acoustic wave. We try to set a transducer at the bottom of the well, which will drive the drill pipe to vibrate vertically, thus, with the acoustic wave as information carrier and with the drill pipe string as transmitting channel, the parameter at the bottom of the oil well could be transmit to the ground in real time.There are some contents to be showed in this paper, including the validation for the transmitting rule of the acoustic wave in the drill pipe string , the argumentation of the signal processing scheme (2FSK modulation) in the experience system, the realization in hardware and software of the receiving part of the experience system and the design of the low power local data receiving system in real time.The base and key point of this project is to validate and fish out the transmitting rule of the acoustic wave in the drill pipe string of Daqing oil field. For this reason, we have done several acoustic wave transmitting experiences in our laboratory and one outfield experience in Daqing on testing the attenuation of the acoustic wave along the drill pipe string. What' more, we are preparing another experience in Daqing oilfield to analyze the attenuation and the transmitting character of different frequency when the drill pipe string is dipped in the admixture of the oil, water and gas in the oil well.Another important part of this thesis is to introduce the developing process of the receiving system with the main processor of TMS320C6416 for the data of the bottom of the well in detail and describe the program of the DSP TMS320C6416. In addition, the thesis has introduce some low power element weightily in the local data receiving system in real time.