Flexible flowline for conveying fluids
AssigneeCoflexip
InventorsJean Hardy, Michel Paul Morand
Life of this patent
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Abstract
Flexible pipe for transporting fluids, comprising, from the inside outwards, a flexible metal carcass with a helical winding of non-contiguous turns, a compressible rod fitted into the gap between the consecutive turns of the helical winding, the compressible rod has a substantial volumetric deformation in compression of at least 50%, an internal sealing sheath extruded over the said metal carcass, at least one ply of armours wound around the said internal sealing sheath and at least one external sealing sheath arranged around the said ply of armours, the rod, its materials, its elastic modules and other features thereof are disclosed.
Claims18
Flexible pipe for transporting fluids such as hydrocarbons comprising, from inside the pipe outwards, a flexible metal carcass with a helical winding of non-contiguous turns with a gap between the turns, a compressible rod fitted into the gap (9), between the consecutive turns of the helical winding, the compressible rod has a substantial volumetric deformation in compression of at least 50%, an internal sealing sheath extruded over the metal carcass, at least one ply of armours wound around the internal sealing sheath and at least one external sealing sheath arranged around the ply of armours.
Method for manufacturing a flexible pipe comprising:
- helically winding a flexible metal carcass with non-contiguous turns;
- providing a gap between turns;
- applying a compressible rod into the gap between the turns;
- the compressible rod being wound into the gaps of the metal carcass while the latter is under axial tension and the gaps are at their widest;
- extruding an internal sheath over the metal carcass;
- applying the at least one ply of armour around the internal sheath and at least one external sealing sheath around the ply of armour.
Dependencies are inferred from the claim text.