An umbilical for transfer of fluids and electric current/signals between the sea surface and equipment deployed on the sea bed, in particular in deep waters, is disclosed. The umbilical comprises a number of pipes ( 4, 4 ′) and electric conductors/wires ( 6, 6 ′) collected in a bundle, a filler material ( 10, 2, 3, 3 ′) lying at least partly around and between the pipes ( 4, 4 ′) and the conductors/wires ( 6, 6 ′), and a protective sheath ( 1 ) enclosing the pipes, conductors/wires and filler material. The load carrying elements ( 7 ) of the umbilical are light weighted rods ( 7 ′) of composite material that can either be collected in bundles or appear individually or in a combination thereof.
1. An umbilical for transmission of fluids and electric current/signals between the sea surface and equipment arranged on the sea bed, comprising:
a plurality of pipes;
electric conductors/wires collected in a bundle;
a filler material arranged at least partly around and between the pipes and the conductors/wires;
the pipes and the conductors/wires forming two concentric rings;
the filler material comprising three concentric rings; and
a protective sheath enclosing the pipes, conductors/wires and filler material,
wherein the umbilical includes separate load carrying elements, said load carrying elements being light weighted rods of composite material.
2. The umbilical according to claim 1 , wherein the light weight rods of composite material are carbon rods having embedded strength fibers.
3. The umbilical according to claim 2 , wherein the filler material, the pipes and the conductors/wires are laid in a helix configuration about the longitudinal axis of the umbilical.
4. The umbilical according to claim 2 , wherein the filler material, the pipes and the conductors/wires are laid in a substantially rectilinear configuration without substantial twisting or spiraling.
5. The umbilical according to claim 2 , wherein the light weighted rods of the umbilical are collected in a spiraling bundle located centrally as a core element within the umbilical.
6. The umbilical according to claim 2 , wherein the light weighted rods of the umbilical are distributed in a number of bundles located peripheral relative to the longitudinal axis of the umbilical.
7. The umbilical according to claim 2 , wherein the umbilical includes weight elements in order to add mass/weight to the umbilical.
8. The umbilical according to claim 1 , wherein the filler material, the pipes and the conductors/wires are laid in a substantially rectilinear configuration without substantial twisting or spiraling.
9. The umbilical according to claim 8 , wherein the light weighted rods of the umbilical are collected in a spiraling bundle located centrally as a core element within the umbilical.
10. The umbilical according to claim 8 , wherein the light weighted rods of the umbilical are distributed in a number of bundles located peripheral relative to the longitudinal axis of the umbilical.
11. The umbilical according to claim 1 , wherein the light weighted rods of the umbilical are collected in a spiraling bundle located centrally as a core element within the umbilical.
12. The umbilical according to claim 1 , wherein the light weighted rods of the umbilical are distributed in a number of bundles located peripheral relative to the longitudinal axis of the umbilical.
13. The umbilical according to claim 1 , wherein the umbilical includes weight elements in order to add mass/weight to the umbilical.
14. The umbilical according to claim 1 , wherein the filler material, the pipes and conductors/wires are laid in several layers viewed in a radial direction.
15. The umbilical according to claim 1 , wherein the light weighted rods are distributed within the cross section of the umbilical.
16. The umbilical according to claim 1 , wherein the filler material is in the form of elongated channel elements which are able to at least partly enclose the respective pipes and conductors/wires in order to keep these in position relative to each other.
17. The umbilical according to claim 1 , wherein the filler material, the pipes and the conductors/wires are laid in a helix configuration about the longitudinal axis of the umbilical.