Patent ID: 7331614
Filing Date: 2008-02-19
Classification: E21B,F16L

Abstract:
1. A threaded tubular connection, comprising: a male threaded element at an end of a first pipe and a female threaded element at an end of a second pipe, the male threaded element comprising an external male threading with trapezoidal threads, the female threaded element comprising an internal female threading with trapezoidal threads, the male and female threadings being made up one inside the other with a given make-up torque such that at least one male thread face is in contact pressure with a corresponding face of the female thread, wherein, prior to contacting a corresponding face of the mating element, at least one thread face exhibits a continuous convexly rounded shape over at least a central part of a width of the at least one thread face, wherein the convexly rounded face is a load flank, and wherein, after make up, said convexly rounded face is in point contact at said central part with said corresponding face of the mating element.