Patent ID: 7942454
Filing Date: 2011-05-17
Classification: E21B,F16L,Y10T

Abstract:
1. A threaded connection comprising: a pin member comprising a single primary pin thread having a pin thread crest, a pin thread root, a pin load flank, and a pin stab flank; and a box member comprising a single primary box thread having a box thread crest, a box thread root, a box load flank, and a box stab flank; wherein at least one of the pin thread crest and the pin thread root of the single primary pin thread and at least one of the box thread crest and the box thread root of the single primary box thread has at least one perturbation formed thereon; wherein upon a selected make-up of the pin member with the box member, a localized clearance or a localized interference exists between the single primary pin thread and the single primary box thread at the at least one perturbation; wherein the localized clearance between the single primary pin thread and the single primary box thread exists across substantially the entire pin thread crest or substantially the entire box thread crest; and wherein the localized interference between the single primary pin thread and the single primary box thread exists across substantially the entire pin thread crest or substantially the entire box thread crest.