Threads with perturbations

Details Threads with perturbations Threads with perturbations

2004-12-30

2008-12-02

Bochna, David E (Department: 3679)

Pipe joints or couplings

Particular interface

Tapered

C285S334000

Reexamination Certificate

active

07458616

ABSTRACT:
A threaded connection including a pin member and a box member, and methods for manufacturing and forming said threaded connection. The pin member has a pin thread with a pin thread crest, a pin thread root, a pin load flank, and a pin stab flank. The box member has a box thread with a box thread crest, a box thread root, a box load flank, and a box stab flank. At least one of the pin thread crest, the pin load flank, the pin stab flank, the box thread crest, the box load flank, and the box stab flank has at least one perturbation formed thereon. Upon a selected make-up of the pin member with the box member, an increased contact stress exists between the pin thread and the box thread at the at least one perturbation.

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International Search Report and Written Opinion dated Oct. 24, 2007, issued in PCT/US2007/069574, 11 pages.

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