Patent ID: 8844632
Filing Date: 2014-09-30
Classification: E21B

Abstract:
1. An inertia transition terminal pipe element comprising a main rigid pipe element including at one of its ends an inertia transition piece that is constituted by a plurality “n” of coaxial reinforcing rigid pipe elements placed coaxially around said main pipe element, each said reinforcing pipe element presenting an inside diameter (d i+1 ) greater than the outside diameter (D 1 , D i ) of the main pipe element and of the other reinforcing pipe element(s) it contains, the various main and reinforcing pipe elements each being positioned with one end situated at the same level along the axis of symmetry (Z 1 Z′ 1 ) of said pipe elements, and each said reinforcing pipe element presenting a length (h i with i=2 to n), that is less than the height (h 1 ) of the main pipe element, and the heights (h i−1 ) of the other reinforcing pipe elements that it contains, annular gap (D i −d i+1 ) between the various pipe elements being filled with a solid filler material; wherein: said annular gaps over their entire heights are completely filled with a solid filler material presenting hardness that is greater than or equal to A50 on the Shore scale; and said inertia transition terminal pipe element is covered over its entire height in a corrosion-resistant elastomer covering material, said inertia transition terminal pipe element presenting a substantially cylindrical-and-conical shape as a result of it being covered in said covering material, said cylindrical-and-conical shape being a shape in which the diameter of the inertia transition terminal pipe element varies in cross section along its axial longitudinal direction in a manner that is progressive and continuous from its smallest diameter end to its largest diameter end.