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Sensor data compression for downhole telemetry applications

  • US 10,465,504 B2
  • Filed: 07/28/2015
  • Issued: 11/05/2019
  • Est. Priority Date: 07/28/2015
  • Status: Active Grant
First Claim
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1. A system, comprising:

  • a downhole sensor device configured to collect sensor data while the downhole sensor device is within a borehole;

    a compression device coupled to the downhole sensor device, the compression device configured to;

    receive the sensor data from the downhole sensor device, the sensor data having one or more rows of n-tuple vectors where n is a positive even integer, and the sensor data corresponding to image data;

    determine a wavelet coefficient vector for at least one row of the one or more rows of n-tuple vectors;

    process the wavelet coefficient vector through each of a set of compression algorithms;

    determine a minimal bit cost of the processed wavelet coefficient vector based, at least in part, on processing the wavelet coefficient vector through each of the set of compression algorithms;

    select a compression algorithm from the set of compression algorithms based, at least in part, on the minimal bit cost;

    generate compressed data from the wavelet coefficient vector based on the selected compression algorithm; and

    encode an indication into the compressed data, the indication identifying the selected compression algorithm; and

    a transmitter configured to transmit the compressed data uphole to facilitate a drilling operation in the borehole.

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