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External casing anchor
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Patent number 6,622,788
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Issue date Sep 23, 2003
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Trent Michael Victor Kaiser
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E21 - EARTH DRILLING MINING
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Swaged pin end of pipe connection
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Patent number 6,024,646
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Issue date Feb 15, 2000
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IPSCO Enterprises Inc.
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John F. Reed
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F16 - ENGINEERING ELEMENTS AND UNITS GENERAL MEASURES FOR PRODUCING AND MAINT...
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Pipe coupling
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Patent number 5,468,029
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Issue date Nov 21, 1995
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IPSCO Enterprises Inc.
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Thomas L. Blose
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E21 - EARTH DRILLING MINING
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Pipe coupling
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Patent number 5,330,239
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Issue date Jul 19, 1994
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IPSCO Enterprises Inc.
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Thomas L. Blose
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E21 - EARTH DRILLING MINING