Patent ID: 7458616
Filing Date: 2008-12-02
Classification: E21B,F16L,Y10T

Abstract:
1. A threaded connection comprising: a pin member comprising a pin thread having a pin thread crest, a pin thread root, a pin load flank, and a pin stab flank; a box member comprising a box thread having a box thread crest, a box thread root, a box load flank, and a box stab flank, and wherein a lead of at least one of the pin load flank, the pin stab flank, the box load flank, and the box stab flank has at least one perturbation formed therein, wherein 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; wherein the at least one perturbation is constructed to form a thread seal between the pin thread and the box thread.