Method and system for tracking time in a downhole tool without the need for a battery
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United States of America Patent
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Jan 3, 2017
Grant Date -
Sep 17, 2015
app pub date -
Mar 13, 2014
filing date -
Mar 13, 2014
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Abstract
Time is tracked in a downhole tool to indicate whether timestamps associated with data samples or events in a log indicate either real time or a duration of time since a certain reset, and to indicate whether the timestamps have been synchronized with a master clock in the tool. The log also records the time and offset of each synchronization event. A computer processes the log to convert all of the timestamps to real-time values and to indicate timestamps that have been estimated and timestamps that were never synchronized to a master clock in the tool. The computer determines an associated uncertainty for each of the estimated timestamps.
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