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Oil or gas field casing

Pipe joints or couplings – Particular interface – Tapered
Patent

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Oil well pipe screw joint, and threading method and...

Pipe joints or couplings – Particular interface – Tapered
Reexamination Certificate

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Oilfield tubular connection

Pipe joints or couplings – Particular interface – Tapered
Reexamination Certificate

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Oilwell tubing connection

Pipe joints or couplings – Particular interface – Tapered
Patent

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Oilwell tubing connection

Pipe joints or couplings – Particular interface – Tapered
Patent

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