4. Pipe joints or couplings
  5. Molded joint
  6. Interlocked

Grant TFW, Inc.

Corporate Assignee

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Apparatus and method for enhancing fatigue properties of subterr

Wells – Processes – Assembling well part
Patent

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Discountinuous plane weld apparatus and method for enhancing fat

Pipe joints or couplings – Molded joint – Interlocked
Patent

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Drill pipe with improved connectors

Pipe joints or couplings – Particular interface – Tapered
Patent

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Shoulder dressing apparatus

Turning – Portable lathe for pipe turning
Patent

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Tool joint

Electric heating – Metal heating – For deposition welding
Patent

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