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Rotary downlink system

  • US 20050209782A1
  • Filed: 03/12/2004
  • Published: 09/22/2005
  • Est. Priority Date: 03/12/2004
  • Status: Active Grant
First Claim
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1. A method for downlink communication with a downhole tool having a mud-powered downhole motor, comprising:

  • receiving a sensor signal related to a rotational speed of a rotor in the mud-powered downhole motor; and

    interpreting the sensor signal to derive a downlink signal.

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