Patent ID: 7661727

Claim:
A threaded tubular connection for a tubular string that is subjected to dynamic bending loads, comprising: a male tubular element including a male threaded portion and a female tubular element including a female threaded portion, at least one transfer zone axially disposed between the threaded portions and a free end of one of the tubular elements, while being axially spaced from the threaded portions, wherein a fraction of at least 20% of bending moment, to which the connection is subjected, is transferred from one element to the other, the male and female elements including respective transfer surfaces in mutual contact with a radial interference fit in the transfer zone, at least one of the transfer surfaces being an undulated surface having a profile and defining a series of annular rounded ribs that come into interfering contact with the facing transfer surface, points of maximum diameter and minimum diameter of the profile being located on respective rounded portions of the profile, the free end of one of the tubular elements having a front surface free of contact with the other tubular element.