Methods and connections for coupled pipe

Pipe joints or couplings – Particular interface – Tapered

Reexamination Certificate

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Reexamination Certificate

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07438329

ABSTRACT:
A threaded and coupled connector with tapered threads having equivalent heights (same height on pin and box threads), negative load flanks, biased tapered thread forms with a torque shoulder formed by pin noses that abut at a central point within a coupling constructed from standard coupling stock. The connection design meets the internal/external pressure performance requirements of industry standards with capabilities equal to or exceeding those of “premium” connections, with a coupling constructed from thin walled coupling stock.

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Seal-Lock Boss specifications, 2002, (3 pages).

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