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Technique for signal detection using adaptive filtering in mud pulse telemetry

  • US 6,308,562 B1
  • Filed: 12/22/1999
  • Issued: 10/30/2001
  • Est. Priority Date: 12/22/1999
  • Status: Expired due to Term
First Claim
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1. A method of detecting telemetry in drilling fluid during drilling operations, comprising the steps of:

  • generating a drilling fluid pressure pulse in a bore hole downstream of a position of a primary transducer creating an upstream traveling, transmitted pulse;

    detecting a combination of the transmitted pulse and a reflected pulse corresponding to the transmitted pulse at the primary transducer and producing a primary signal based upon the detected combination of the transmitted pulse and the detected reflected pulse;

    detecting the transmitted pulse at a reference transducer upstream from the position of the primary transducer and producing a secondary signal based upon the detected transmitted pulse; and

    generating an adaptive noise canceler (ANC) output signal based upon a difference between the primary signal and the secondary signal.

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