Device having a radial partition, especially for arresting the propagation of a radial buckle in a double-walled pipe intended for great depths
AssigneeCoflexip
InventorsBill G. Louis, Mike Bell
Life of this patent
Estimating the term…
Abstract
This device 10 for arresting the propagation of a buckle appearing on an outer tube 3 of a double-walled rigid pipe 1 intended to transport hydrocarbons and consisting of two coaxial tubes 2, 3, this pipe being of the reelable type and intended for very great depths, consists of a thick and rigid annular transverse partition 11 fastened to the inner tube 2 and to the outer tube 3. The partition 11 is joined to the outer tube 3 and to the inner tube 2 by means of an outer 12 and inner 14 sleeve having the same diameter as the said outer and inner tubes and fastened to the latter.
Claims8
Device (10) for arresting the propagation of a radial buckle appearing on an outer tube (3) of a double-walled rigid pipe (1) for transporting hydrocarbons, which consists of two coaxial metal tubes, respectively the inner tube (2) and the outer tube (3), separated by an annular space (5), this pipe (1) being of the reelable type and intended for very great depths, characterized in that it consists of a thick and rigid annular transverse partition (11) fastened to the inner tube (2) and to the outer tube (3).
Device according to any one of the preceding claims, characterized in that the partition (11) is fastened to the inner tube or to the inner sleeve in a region (15) of the latter having a thickness which gradually increases towards the outside.
Device according to any one of the preceding claims, characterized in that the partition (11) is fastened to at least one of the inner (2) or outer (3) tubes or to the inner (14) or outer (12) sleeves by welding, by adhesive bonding or by screwing.
Device according to any one of the preceding claims, characterized in that the partition (11) is made of a material which is mechanically strong and is a poor thermal conductor, such as a ceramic.
Device (10) with a radial partition (11) for a rigid double-walled pipe (1) or tube for transporting hydrocarbons, the said pipe consisting of two, respectively inner (2) and outer (3) coaxial metal tubes separated by an annular space (5), this pipe (1) being intended for very great depths, characterized in that it consists of a thick and rigid annular transverse partition (11) joining an outer metal sleeve (12) to an inner metal sleeve (14) of the same diameter as the said outer tube (3) and the said inner tube (2) respectively, these sleeves being designed to be welded to the inner tube (2) and to the outer tube (3) respectively, connection between the inner sleeve (14) and the outer sleeve (12) being provided by screwing (13).
Dependencies are inferred from the claim text.