Downhole noise cancellation in mud-pulse telemetry
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United States of America Patent
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Aug 19, 2014
Grant Date -
Mar 27, 2008
app pub date -
Sep 14, 2007
filing date -
Sep 22, 2006
priority date (Note) -
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Abstract
Pressure measurements are made using a pressure sensor in the proximity of the drillbit during drilling operations. A filtered version of the pressure measurements is provided to a pulser for a mud-pulse telemetry system so as to cancel pressure variations due to drilling noise while a telemetry signal is being sent. It is emphasized that this abstract is provided to comply with the rules requiring an abstract which will allow a searcher or other reader to quickly ascertain the subject matter of the technical disclosure. It is submitted with the understanding that it will not be used to interpret or limit the scope or meaning of the claims. 37 CFR 1.72(b).
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