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Drum load monitoring
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Patent number 9,664,029
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Issue date May 30, 2017
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Schlumberger Technology Corporation
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Sebastien Ives
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E21 - EARTH DRILLING MINING
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Drum load monitoring
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Patent number 9,162,853
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Issue date Oct 20, 2015
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Schlumberger Technology Corporation
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Sebastien Ives
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B66 - HOISTING LIFTING HAULING
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Creep determination technique
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Patent number 7,475,486
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Issue date Jan 13, 2009
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Schlumberger Technology Corporation
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Peter Fitzgerald
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E21 - EARTH DRILLING MINING
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Depth correction
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Patent number 7,047,653
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Issue date May 23, 2006
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Schlumberger Technology Corporation
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Peter Fitzgerald
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E21 - EARTH DRILLING MINING