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Two hermetic threaded tubular joints
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Patent number 8,146,960
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Issue date Apr 3, 2012
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Vallourec Mannesmann Oil & Gas France
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Laurent Dubedout
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Threaded joint for steel pipes
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Patent number 7,997,627
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Issue date Aug 16, 2011
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Sumitomo Metal Industries, Ltd.
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Masaaki Sugino
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Tubular threaded joint
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Patent number 7,823,931
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Issue date Nov 2, 2010
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Sumitomo Metal Industries, Ltd.
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Takahiro Hamamoto
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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