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Subsea control system diagnosis

  • US 7,895,001 B2
  • Filed: 12/23/2008
  • Issued: 02/22/2011
  • Est. Priority Date: 12/23/2008
  • Status: Active Grant
First Claim
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1. A method for monitoring the health of a hydraulic control system comprising:

  • a) capturing a layout and parameters of the hydraulic control system;

    b) capturing a valve signature during a System Integration Test;

    c) generating a simulated valve signature to match the valve signature captured during the System Integration Test by using a simulation algorithm and adjusting parameters of the hydraulic control system;

    d) recording the parameters of the hydraulic control system used to generate the simulated valve signature that matches the valve signature captured during the System Integration Test;

    subsequent to steps c to d;

    e) capturing a valve signature for a subsea valve opening/closing;

    f) generating a simulated subsea valve signature to match the subsea valve signature captured for the subsea valve opening/closing by using the simulation algorithm and adjusting parameters of the hydraulic control system;

    g) recording the parameters of the hydraulic control system used to generate the simulated subsea valve signature that matches the valve signature captured for the subsea valve opening/closing;

    h) repeating steps e), f) and g); and

    i) tracking changes in the parameters of the hydraulic control system over time.

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