Light and reinforced undersea coaxial pipe element
US7722088B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 13, 2005 |
| Grant date | May 25, 2010 |
| Priority date | — |
| Expiry date | May 28, 2027 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16L59/143
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A unit element of undersea pipe, in particular for providing a bottom-to-surface connection, constituted by an assembly of two coaxial pipe elements of the PiP type (1) presenting an inner pipe element (2) and an outer pipe element (3) coaxial thereabout with an annular space (41) between the pipes, preferably including a thermally insulating material (42) in the annular space, and including at each end a junction piece (6, 6a-6b) in the form of a steel forging for connecting together two of the unit elements of axial pipe (1), the junction forgings (6) being welded to the ends of both of the inner and outer pipes, the unit elements being characterized in that the inner pipe element (2) comprises in its main portion an inner tube (21) of metal presenting thickness that is small relative to the thickness of the ends of the inner pipes that are welded to the junction forgings (6), the thickness of the inner tube being less than 50% the thickness of the ends of the inner pipe, the inner tube (2) being covered in a material (22) comprising longitudinal continuous fibers wound around the inner tube so as to cover the surface of the inner tube entirely.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.