Flexible tubular underwater pipe for great depths, and method for manufacturing same
US9400067B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 29, 2012 |
| Grant date | Jul 26, 2016 |
| Priority date | — |
| Expiry date | Jan 17, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2053/8025
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for manufacturing a flexible tubular underwater pipe (10): A leakproof tubular structure (12, 14, 16) is covered with at least one layer (18, 20) of armor wires. At least one continuous longitudinal element made of a deformable material is wound in a helix with short pitch around the layer (18, 20) of armor wires to form a holding layer 24. The at least one longitudinal element is wound under longitudinal tension T0 so as to stretch its deformable material according to a relative elongation corresponding to a tensile stress σ0 less than the elastic limit value σE of the deformable material, and the elastic limit value σE corresponds to a tensile stress beyond which the deformation of the material is irreversible.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.