METHOD AND APPARATUS FOR ACOUSTIC DATA TRANSMISSION IN A SUBTERRANEAN WELL
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Abstract
The disclosure describes a method and apparatus for effectively communicating data along an acoustic transmission path. The method comprises driving an acoustic transmitter to send a data signal along the acoustic transmission path, where the signal is distorted by ambient noise. The distorted signal is input to a spaced apart plurality of sensors so that consequent time-delayed signals provide reinforcement of the basic signal and attenuation of the ambient noise component when combined.
15 Citations
20 Claims
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1-8. -8. (canceled)
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9. A method of data transmission in an oil well environment, the method comprising the steps of:
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providing an acoustic transmitter and an acoustic receiver, the transmitter and receiver spaced apart along an acoustic transmission channel; sending a plurality of transmitted signals from the transmitter, along the acoustic channel, where the transmitted signals are joined by ambient noise traveling along the acoustic channel; providing at least one sensor at the receiver, the at least one sensor for sensing and creating a plurality of sensor signals corresponding to the plurality of transmitted signals; sensing the transmitted signals and ambient noise at the sensor, the sensor providing corresponding electrical output signals; and combining the sensor output signals to provide a receiver signal, thereby reducing the effect of ambient noise on the transmitted signals. - View Dependent Claims (10, 11, 12, 13, 14, 15)
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16. A method of data transmission in an oil well environment, the method comprising the steps of:
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providing an acoustic transmitter and an acoustic receiver, the transmitter and receiver spaced apart along an acoustic transmission channel; sending an acoustic signal from the transmitter at one or more chosen frequencies, along the acoustic channel, where it is joined by ambient noise traveling along the acoustic channel; providing at least one sensor at the receiver for sensing the transmitted signal and ambient noise in the channel, the sensor providing a corresponding electrical sensor output signal; providing a noise-reference sensor for sensing the ambient noise in the channel, the noise-reference sensor providing a corresponding electrical noise-reference output signal; and combining the output signals to provide a receiver signal, thereby reducing the effect of ambient noise on the transmitted signal. - View Dependent Claims (17, 18, 19, 20)
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Specification