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Self cleaning pistons
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Patent number 10,302,196
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Issue date May 28, 2019
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Schlumberger Technology Corporation
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Jacques Orban
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E21 - EARTH DRILLING MINING
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Steering system for drill string
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Patent number 9,869,140
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Issue date Jan 16, 2018
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Schlumberger Technology Corporation
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Guy James Rushton
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E21 - EARTH DRILLING MINING
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Drill string with modular motor units
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Patent number 8,408,335
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Issue date Apr 2, 2013
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Schlumberger Technology Corporation
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Guy James Rushton
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F03 - MACHINES OR ENGINES FOR LIQUIDS WIND, SPRING WEIGHT AND MISCELLANEOUS M...
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Seal arrangement
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Patent number 7,238,001
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Issue date Jul 3, 2007
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Rolls-Royce PLC
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Guy J Rushton
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...