4. Pipe joints or couplings
  5. Particular interface
  6. Tapered

Jackie E. Smith

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Drill pipe with improved connectors

Pipe joints or couplings – Particular interface – Tapered
Patent

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High efficiency drill pipe

Pipe joints or couplings – Particular interface – Tapered
Reissue Patent

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High efficiency drill pipe

Pipe joints or couplings – Particular interface – Tapered
Reexamination Certificate

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Method of connecting joints of drill pipe

Metal working – Method of mechanical manufacture – Assembling or joining
Patent

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Oilfield tubular connection

Pipe joints or couplings – Particular interface – Tapered
Reexamination Certificate

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Profile ID: LFUS-PAI-P-1123029

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