Patent ID: 7946790
Filing Date: 2011-05-24
Classification: E21B

Abstract:
1. A bottom-surface connection installation for at least two undersea pipes resting on the sea bed, the installation comprising: a first hybrid tower comprising: at least one second rigid pipe rising from the sea bottom where it rests or from a second undersea pipe resting on the sea bottom and to which its bottom end is connected, to below the surface, where its top end is connected to at least one respective second flexible connection pipe connecting it with the same said floating support: wherein the bottom end of said at least one second rigid pipe is not anchored to said first base; wherein the top end of said at least one second rigid pipe is connected respectively to a second float situated substantially at the same depth as said first float and fastened rigidly to said first float, one against the other; and wherein said second rigid pipe is selected from the group consisting of