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Keywords: critical total revolution
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Proceedings Papers

Paper presented at the IADC/SPE Asia Pacific Drilling Technology Conference and Exhibition, November 13–15, 2006
Paper Number: SPE-102384-MS
... numbers. After these investigations, standards for the maximum total drilling revolutions of drill collar to prevent fatigue failure were decided for each size of drill collar. After the critical total revolutions, all drill collars used for drilling were sent to the maintenance shop for magnetic particle...

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