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Bypass valve
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Patent number 10,822,896
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Issue date Nov 3, 2020
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Baker Hughes, a GE company, LLC
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Darin H. Duphorne
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E21 - EARTH DRILLING MINING
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Downhole force generating tool
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Patent number 10,577,867
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Issue date Mar 3, 2020
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Thru Tubing Solutions, Inc.
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Roger Schultz
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F04 - POSITIVE DISPLACEMENT MACHINES FOR LIQUIDS PUMPS FOR LIQUIDS OR ELASTIC...
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Running bore-lining tubulars
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Patent number 7,849,927
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Issue date Dec 14, 2010
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Deep Casing Tools Ltd.
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Derek F. Herrera
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E21 - EARTH DRILLING MINING
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Vessel for well intervention
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Patent number 7,650,944
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Issue date Jan 26, 2010
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Weatherford/Lamb, Inc.
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John Boyle
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B63 - SHIPS OR OTHER WATERBORNE VESSELS RELATED EQUIPMENT
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Pipe-driving apparatus
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Patent number 4,790,395
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Issue date Dec 13, 1988
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Gewerkschaft Eisenhutte Westfalia GmbH
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Helmut Gack
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E21 - EARTH DRILLING MINING
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3593811
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Patent number 3,593,811
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Issue date Jul 20, 1971
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E21 - EARTH DRILLING MINING
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3539023
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Patent number 3,539,023
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Issue date Nov 10, 1970
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E21 - EARTH DRILLING MINING