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Remote monitoring and controlling system for subsea oil/gas production equipment

  • US 4,138,669 A
  • Filed: 05/03/1974
  • Issued: 02/06/1979
  • Est. Priority Date: 05/03/1974
  • Status: Expired due to Term
First Claim
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1. In a system for the remote monitoring and controlling of functions of subsea oil/gas production equipment wherein a control station generates a plurality of coded signals for transmission to first and second remote stations for the monitoring and control of the production equipment, said control station comprisingselection means for selecting either the first or the second remote stations for the control of the production equipment, said first remote control station having dominant control with respect to said second remote control;

  • control means for generating an address and control digital signal for transmission to the selected remote station for a selected function thereat;

    alarm level adjustment means for generating an alarm level digital signal for transmission to the selected remote station for selecting a predetermined alarm level for a predetermined function;

    first multiplexing means coupled to said control and alarm means and operable for forming one of said coded signals from both said address and control signal and said alarm level signal and operable for multiplexing said plurality of coded signals for transmission to the selected remote station;

    priority selection means operable to receive said one coded signal from said first multiplexing means for storing said one coded signal in accordance with a predetermined signal priority arrangement;

    second multiplexing means for the selective demultiplexing of a received coded signal from the selected remote station to obtain a coded signal in a time slot allocated to said one coded signal;

    comparator means operable for receiving and comparing said received coded signal in the time slot allocated to said one coded signal with said one signal and operable to produce a set signal for a match therebetween;

    execute control means for generating an execute digital signal when said set signal and a predetermined signal are coupled therein;

    coupling means for coupling said execute digital signal to said first multiplexer means for incorporation into said one coded signal for transmission; and

    monitor means for providing monitoring information to said second remote station when said first remote station has been selected.

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