Threaded joint for steel pipes

Details Threaded joint for steel pipes Threaded joint for steel pipes

2007-02-23

2009-02-24

Dunwoody, Aaron M (Department: 3679)

Pipe joints or couplings

Particular interface

Tapered

C285S333000

Reexamination Certificate

active

07494159

ABSTRACT:
In a threaded joint for steel pipes which are connected by threaded engagement of a pin member having a tapered male thread, a metal seal-forming portion, and a torque shoulder-forming portion on the end of a pipe, and a box member having a tapered female thread, a metal seal-forming portion, and a torque shoulder forming-portion corresponding to these on the end of a pipe, a buttress thread having contact at the load flanks and the thread root surface and gaps at the thread crest surface and the stabbing flanks is mixed in a single joint with a rugged thread having contact at the load flanks and stabbing flanks and having gaps at the thread root surface and thread crest surface.

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