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Wellhead system
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Patent number 5,327,972
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Issue date Jul 12, 1994
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Cooper Industries, Inc.
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David H. Theiss
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E21 - EARTH DRILLING MINING
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Tubing hanger seal assembly
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Patent number 5,193,616
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Issue date Mar 16, 1993
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Cooper Industries, Inc.
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Joseph H. Hynes
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E21 - EARTH DRILLING MINING
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Break-away flowline fitting
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Patent number 5,161,828
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Issue date Nov 10, 1992
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Cooper Industries, Inc.
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Joseph H. Hynes
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E21 - EARTH DRILLING MINING
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Double walled riser
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Patent number 5,159,982
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Issue date Nov 3, 1992
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Cooper Industries, Inc.
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Joseph H. Hynes
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E21 - EARTH DRILLING MINING
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-
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Annular metal-to-metal seal
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Patent number 5,026,074
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Issue date Jun 25, 1991
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Cooper Industries, Inc.
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Larry M. Hoes
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E21 - EARTH DRILLING MINING
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-
-
-
-
-
-
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Threaded coupling
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Patent number 4,496,173
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Issue date Jan 29, 1985
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Hydril Company
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Joseph R. Roche
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E21 - EARTH DRILLING MINING
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