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Stage tool
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Patent number 11,840,905
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Issue date Dec 12, 2023
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Weatherford Technology Holdings, LLC
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Stephanie Dianne Wind
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E21 - EARTH DRILLING MINING
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Modular liner hanger
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Patent number 7,128,147
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Issue date Oct 31, 2006
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Watherford/Lamb Inc.
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Jozeph R. Marcin
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Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC
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Automatic tubing filler
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Patent number 7,108,071
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Issue date Sep 19, 2006
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Weatherford/Lamb, Inc.
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Roland Richard Freiheit
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E21 - EARTH DRILLING MINING
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Two-stage downhole packer
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Patent number 6,612,372
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Issue date Sep 2, 2003
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Weatherford/Lamb, Inc.
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Roland R. Freiheit
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E21 - EARTH DRILLING MINING
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