Vulcanised power umbilical
View Patent ↗A power umbilical, a DEH power cable or general umbilical, including a plurality of high power cables for transfer of large amounts of electric energy, filler material in the form of stiff elongate plastic elements located at least partially around and between the high power cables, which together are collectively gathered in a spiraled bundle by means of a laying and closing operation, and a protective sheath that encapsulates the high power cables and the filler material is shown. The high power cables are at intervals in the longitudinal direction of the cables, provided with frictional material which cooperate with the filler material for frictional engagement with and load transfer between each other.
1. A power umbilical, a DEH power cable or general umbilical, including a plurality of high power cables for transfer of large amounts of electric energy, filler material in the form of stiff elongate plastic elements located at least partially around and between the high power cables and which together are collectively gathered in a spiralled bundle by means of a laying and closing operation, and a protective sheath that encapsulates the high power cables and the filler material, wherein the high power cables, at intervals in the longitudinal direction of the cables, are provided with frictional means which cooperate with the filler material for frictional engagement with and load and weight transfer to each other, while the high power cables between said vulcanisation spots extend freely in longitudinal cavities within the filler material for possible expansion and contraction of every single high power cable during alternating temperatures within the conductor of the high power cable.
2. The power umbilical, the DEH power cable or the general umbilical according to claim 1 , wherein the frictional means is in the form of a vulcanisation, alternatively a flexible glue.
3. The power umbilical, the DEH power cable or the general umbilical according to claim 2 , characterized in that the vulcanisation takes place by means of a vulcanisation tape that is winded around the high power cable at dedicated spots.
4. The power umbilical, the DEH power cable or the general umbilical according to claim 2 , wherein the high power cable and the filler material are SZ laid, i.e. laid and closed alternately by regularly shifting direction, in the entire or parts of the longitudinal extension of the power umbilical, combined with that the SZ laid bundle is retained substantially rotationally stiff by the protective sheath, alternatively laid in a helix.
5. The power umbilical, the DEH power cable or the general umbilical according to claim 2 , wherein at least one load carrying element is predetermined located in the transversal cross section of the power umbilical, which at least one load carrying element is laid and closed in a SZ configuration, alternatively laid in a helix, and is vulcanised to the filler material, preferably at intervals.
6. The power umbilical, the DEH power cable or the general umbilical according to claim 2 , wherein t it includes electric wires and/or optical conductors which are laid and closed in a SZ configuration and are located inside the sheath, alternatively laid in a helix, and is vulcanised to the filler material.
7. The power umbilical, the DEH power cable or the general umbilical according to claim 1 , wherein the vulcanisation takes place by means of a vulcanisation tape that is winded around the high power cable at dedicated spots.
8. The power umbilical, the DEH power cable or the general umbilical according to claim 7 , wherein the high power cable and the filler material are SZ laid, i.e. laid and closed alternately by regularly shifting direction, in the entire or parts of the longitudinal extension of the power umbilical, combined with that the SZ laid bundle is retained substantially rotationally stiff by the protective sheath, alternatively laid in a helix.
9. The power umbilical, the DEH power cable or the general umbilical according to claim 7 , wherein at least one load carrying element is predetermined located in the transversal cross section of the power umbilical, which at least one load carrying element is laid and closed in a SZ configuration, alternatively laid in a helix, and is vulcanised to the filler material, preferably at intervals.
10. The power umbilical, the DEH power cable or the general umbilical according to claim 7 , wherein t it includes electric wires and/or optical conductors which are laid and closed in a SZ configuration and are located inside the sheath, alternatively laid in a helix, and is vulcanised to the filler material.
11. The power umbilical, the DEH power cable or the general umbilical according to claim 1 , wherein the high power cable and the filler material are SZ laid, i.e. laid and closed alternately by regularly shifting direction, in the entire or parts of the longitudinal extension of the power umbilical, combined with that the SZ laid bundle is retained substantially rotationally stiff by the protective sheath, alternatively laid in a helix.
12. The power umbilical, the DEH power cable or the general umbilical according claim 11 , wherein the load carrying are at least one among the following elements: carbon fibre rods, steel wire, fibre rope or steel rope.
13. The power umbilical, the DEH power cable or the general umbilical according to claim 11 , wherein at least one load carrying element is predetermined located in the transversal cross section of the power umbilical, which at least one load carrying element is laid and closed in a SZ configuration, alternatively laid in a helix, and is vulcanised to the filler material, preferably at intervals.
14. The power umbilical, the DEH power cable or the general umbilical according to claim 11 , wherein t it includes electric wires and/or optical conductors which are laid and closed in a SZ configuration and are located inside the sheath, alternatively laid in a helix, and is vulcanised to the filler material.
15. The power umbilical, the DEH power cable or the general umbilical according to claim 1 , wherein at least one load carrying element is predetermined located in the transversal cross section of the power umbilical, which at least one load carrying element is laid and closed in a SZ configuration, alternatively laid in a helix, and is vulcanised to the filler material, preferably at intervals.
16. The power umbilical, the DEH power cable or the general umbilical according to claim 15 , wherein t it includes electric wires and/or optical conductors which are laid and closed in a SZ configuration and are located inside the sheath, alternatively laid in a helix, and is vulcanised to the filler material.
17. The power umbilical, the DEH power cable or the general umbilical according to claim 1 , wherein t it includes electric wires and/or optical conductors which are laid and closed in a SZ configuration and are located inside the sheath, alternatively laid in a helix, and is vulcanised to the filler material.
18. The power umbilical, the DEH power cable or the general umbilical according to claim 1 , wherein it includes an anti rotation band or strength ribbon, or a tape, which is helically winded around the bundle just inside the sheath, alternatively the strength ribbon, or the tape, is helically winded around the bundle in two or more layers, laid and closed in opposite directions.
19. The power umbilical, the DEH power cable or the general umbilical according to claim 1 , wherein it includes at least one fluid pipe in its transversal cross section, of metal and/or plastic material, laid and closed in the same configuration as the other elements.
20. The power umbilical, the DEH power cable or the general umbilical according to claim 1 , wherein the laying and closing of the high power cables, the possible electric wires and/or optical conductors, the filler material and the at least one load carrying elements make about one half to three revolutions before it alters direction.