Patent ID: 9133693
Filing Date: 2015-09-15
Classification: E21B

Abstract:
1. An expandable pipe section, intended to be joined with an adjoining expanding pipe section and for use in connection with a well casing in a production well for hydrocarbons, wherein the pipe section is configured to be screwed on or off the adjoining expandable pipe section, the expandable pipe section at one end being provided with a male end having externally arranged threads and the adjoining expandable pipe section being provided with a correspondingly shaped female end having corresponding internal threads, wherein a distance between adjacent threads at the widest point of the threads is less than the maximum width of a thread, wherein those parts of the pipe being provided with threads are formed of at least two parts, each with a cylindrical surface being coaxially arranged with the pipe wall(s), and wherein the cylindrical surface of a first part of said at least two parts has a radius which is smaller than the radius of the cylindrical surface of a second part of said at least two parts.