Abstract: A device for arresting the propagation of a buckle appearing on an outer tube of a double-walled rigid pipe intended to transport hydrocarbons and consisting of two coaxial tubes. The double-walled pipe is of the reelable type and intended for very great depths and consists of a thick and rigid annular transverse partition fastened to the inner tube and to the outer tube. The partition is joined to the outer tube and to the inner tube by way of an outer and inner sleeve having the same diameter as the outer and inner tubes and fastened to the latter.

Abstract: In combination, a lower pipeline, an upper pipeline which crosses the lower pipeline, and at least one pipeline crossing module for supporting the upper pipeline above the lower pipeline. The pipeline crossing module may comprise a spacing element; a clip element attached to the spacing element and sized for surrounding the upper pipeline while permitting the module to rotate about the upper pipeline to a position in which the module is disposed downward from the upper pipeline. The at least one module may comprise a first module and a second module, the first module and the second module being disposed on the upper pipeline so as to define a downward-facing support surface for contacting an upper surface of the lower pipeline to support the upper pipeline thereon.

Abstract: A device for arresting the propagation of a buckle appearing on an outer tube of a double-walled rigid pipe intended to transport hydrocarbons and consisting of two coaxial tubes. The double-walled pipe is of the reelable type and intended for very great depths and consists of a thick and rigid annular transverse partition fastened to the inner tube and to the outer tube. The partition is joined to the outer tube and to the inner tube by means of an outer and inner sleeve having the same diameter as the outer and inner tubes and fastened to the latter.

Abstract: A subsea connector system and method utilizing a skid (18) on the sea floor (F) four coupling a subsea conduit (16) carried by the skid (18) to a subsea conduit (12) on a relatively fixed subsea structure (10). A lift line device or structure (24) has an upper lift line (36) connected by a spreader bar (40) to a pair of lower guide lines (38) which are directed from a vertical position to a generally horizontal relation by J-tubes (30). The ends of the guide lines (38) have anchor members (42) thereon which are anchored to guides (46) on the subsea facility (10). Upon raising of the upper lift line (36), the skid (18) moves in a combined pulling and lifting motion to engage a side (52) of the subsea facility (10) for being guided into a docked position with aligned guides (46) on the subsea facility (10). In this position, an ROV (26) secures the skid (18) into a releasably locked position by insertion of retainer pins (not shown) into aligned openings (35, 51) of the skid (18) and subsea facility (10).