4. Pipe joints or couplings
  5. With casing, lining or protector
  6. Lined

Vallourec Oil & Gas

Corporate Assignee

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Threaded joint for metal tubes with internal coating

Pipe joints or couplings – With casing – lining or protector – Lined
Patent

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Threaded joint for pipes

Pipe joints or couplings – Particular interface – Tapered
Patent

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Threaded joint for tubes

Pipe joints or couplings – Particular interface – Tapered
Patent

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Threaded joint for tubes

Pipe joints or couplings – With lubrication
Patent

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