Double-sheath pipe for transporting fluids, provided with a device for limiting propagation of a buckle of the outer tube and method for limiting propagation
AssigneeCoflexip
InventorsAntoine Bastard, Mike Bell
Life of this patent
Estimating the term…
Abstract
The invention concerns a double-sheath rigid pipe for transporting hydrocarbons consisting of two respectively inner (2) and outer (3) coaxial tubes separated by an annular gap (5), said pipe being adapted to be wound and comprising a device limiting the propagation of a deformation occurring on the outer tube, wherein a radial stop device (10) linked to the inner tube (2) but not linked to the outer tube (3) allows a localized collapse of value G of the outer tube, G being selected to stop the propagation of a deformation of the outer tube (3).
Claims15
A plural tube rigid pipe for fluid transmission wherein the pipe being intended to be immersed and subjected to hydrostatic pressure, the pipe including
- coaxial inner and outer tubes, with the tubes being shaped and positioned to define an annular space between the inner and outer tubes, the inner tube having an inner hollow space to allow fluid to flow therethrough;
- the rigid pipe and the tubes thereof are of types to enable the pipe to be reelable;
- a buckle propagation limiting device for limiting propagation of a buckle occurring in the outer tube, the device comprising a radial stop device linked to the inner tube and not linked to the outer tube, wherein the radial stop device is shaped and positioned as to permit a localized collapse of the outer tube, but the value of the permitted localized collapse is chosen to arrest the propagation of a buckle of the outer tube, and the buckle propagation limiting device is of a type to enable the pipe to be reelable.
Dependencies are inferred from the claim text.