Patent ID: 8561706
Filing Date: 2013-10-22
Classification: E21B

Abstract:
1. A connection system for assembling two sections of a riser pipe used for offshore drilling, each of the two sections of the riser comprising a main tube section and at least one auxiliary line section arranged parallel to said main tube section, the connection system comprising a main tube connector including a first locking ring—whose rotation forms a first axial stop for assembling the main tube section of each of the two sections of the riser, and at least—one auxiliary line connector comprising a second locking ring—whose rotation forms a second axial stop for assembling the at least one auxiliary section of each of the two sections of the riser, wherein the at least one auxiliary line connector is offset in the direction of the axis of the riser with respect to the main tube connector including when the two sections of the riser are assembled by the connection system so that the cylinder wherein the at least one auxiliary line connector is inscribed overlaps the cylinder wherein the main tube connector—is inscribed, said cylinders being parallel to the axis of the riser.