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Hydraulic system and method of monitoring

  • US 9,206,667 B2
  • Filed: 09/19/2013
  • Issued: 12/08/2015
  • Est. Priority Date: 10/28/2008
  • Status: Active Grant
First Claim
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1. A method of monitoring a hydraulic system deployed on a surface of a well site, comprising:

  • coupling a hydraulic pump adapted for use in at least one of a well cementing operation, a well stimulation operation, and a coiled tubing service with a hydraulic motor via a hydraulic line;

    deploying a pressure sensor to measure pressure in the hydraulic line;

    processing consecutively recorded data points of a hydraulic pressure signal received from the pressure sensor to decompose the consecutively recorded data points into a series of data subsets representing scaled base functions localized in frequency and time;

    using a processor to search the series of data subsets for failure signatures in frequency and time domains; and

    outputting an indication as to whether a failure condition of the hydraulic system is found.

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