High-pressure pipe element having an assembly of hooped tubes and method of manufacture
AssigneeIfp
InventorsGérard Papon, Jean Guesnon
Life of this patent
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Abstract
The invention relates to a high-pressure pipe element having at least two metal tubes 1, 3 reinforced by hoops 2 and 4, the ends of the tubes being bare. The tubes are assembled end to end by a weld 5 of the bared ends. A sleeve 6 covers the weld 5 as some of the hooping 2 and 4 of each tube, forming an annular space between the bare ends of the tubes and the sleeve, said space being filled with a setting material 9.
Claims12
1) High-pressure pipe element having at least two metal tubes reinforced by hoops, the ends of the tubes being bare, the tubes being assembled end to end by welding the bare ends, a sleeve covering the weld as well as a portion of the hooping of each tube forming an annular space between the bare ends of tubes and the sleeve, said space being filled with an injectable and setting material.
4) High-pressure pipe element according to one of the foregoing claims, wherein the hooping has reinforcing elements made of fibers embedded in a polymer material.
7) Method of manufacturing a high-pressure pipe having at least two metal tubes the method including at least the following operations:
- a) reinforcing elements are wound around metal tubes leaving the tube ends bare,
- b) tubes are welded together end to end,
- c) the sleeve is positioned at the level of the weld, with the sleeve covering the weld as well as a portion of reinforcing elements of each tube, forming an annular space between the bare ends of the tubes and the sleeve, and
- d) a setting material is injected into the annular space.
Dependencies are inferred from the claim text.