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Pipeline communications

  • US 9,005,423 B2
  • Filed: 12/04/2012
  • Issued: 04/14/2015
  • Est. Priority Date: 12/04/2012
  • Status: Expired due to Fees
First Claim
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1. In a pipeline impressed current cathodic protection (ICCP) system, a method of synchronizing power control switching of individual ICCP systems associated with respective sections of such pipeline, comprising:

  • impressing an alternating current (AC) signal on at least selected ones of the multiple sections; and

    disabling individual ICCP systems in accordance with characteristics of a received impressed AC signal;

    wherein disabling comprises synchronously disconnecting individual ICCP system power supply transformers from their normal power source.

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