Patent ID: 7025535

Claim:
A bottom-to-surface connection installation for an undersea pipe resting on the sea bed, in particular at great depth, the installation comprising: a) at least one vertical riser having its bottom end connected to at least one undersea pipe resting on the sea bed, and having at least one float at its top end; b) at least one connection pipe, preferably a flexible hose, providing the connection between a floating support and the top end of said vertical riser; and c) the connection between the bottom end of said vertical riser and a said undersea pipe resting on the sea bed is made via an anchor system comprising a base placed on the sea bed, the installation being characterized in that: said base serves to hold and guide junction elements between the bottom end of said vertical riser and the end of the rectilinear horizontal end portion of said pipe resting on the sea bed; said junction elements comprise a rigid pipe element presenting an angled bend and a pipe coupling element, preferably a single coupling element, and more preferably a single automatic connector and they are fixed to a moving support of said base suitable for moving, preferably in controlled manner, on a platform of said base resting on the sea bed; said junction elements are held and guided in such a manner that said junction elements fixed to said moving support are free to move only in translation in a single longitudinal direction YY′ corresponding substantially to the axial direction of said horizontal rectilinear end portion of said undersea pipe resting on the sea bed.