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US2868221A
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Plug valve
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Combined sealing plug and tubing hanger
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Multiple well completion
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Dual bore valve
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Automatic self sealing stem
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Pipe suspension and sealing means with means to limit compression of the seal
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Interchangeable tubing head seal and casing hold-down and tool guide
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Welded connections and valves and method of making same
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CA650818A
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Casing hanger
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CA617985A
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Well head dual suspension and seal
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CA587973A
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Automatic self-sealing stem
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CA618057A
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Flange connected well head apparatus
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CA621839A
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Combined sealing plug and tubing hanger
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CA696953A
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Tubing suspension and installation thereof
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Automatic plastic sealed valves
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CA617144A
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Well completion apparatus
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CA650813A
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Multiple well pipe support apparatus
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CA590124A
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Dual bore valve
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CA617158A
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Tubing pack off for tandem dual bore integral manifold valve
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CA621437A
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Dual tubing hanger for wells
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