EP 0911482 B1 20041020 - Stress relief joints for risers
Title (en)
Stress relief joints for risers
Title (de)
Zugentlastungsverbindung für Steigrohre
Title (fr)
Joint de relaxation des contraintes pour colonnes montantes
Publication
Application
Priority
US 95849597 A 19971027
Abstract (en)
[origin: EP0911482A2] A stress relief joint (10) for use with riser pipe (22) in floating systems wherein a vessel is subjected to variable motion caused by wind, currents and/or wave action. The riser pipe (22) has one end connectable to the sea floor and an upper portion arranged to pass through an opening at the bottom of the vessel. The lower end, which is connectable to other pipes at the sea floor, is provided with concentric pipes or sleeves (30, 32) around the riser (22). The lower ends of the pipes (30, 32) and riser (22) are welded to a flange (34). The upper end of each of the concentric pipes (30, 32) extends beyond the upper end of the pipe immediately surrounding it. The annulus between the concentric pipes (30, 32) and the riser (22) may be filled with a durable and pliable material (36). Also, shims (38) may be inserted in the annulus at the end of each pipe segment. <IMAGE>
IPC 1-7
IPC 8 full level
E21B 17/01 (2006.01); B63B 21/50 (2006.01)
CPC (source: EP)
E21B 17/017 (2013.01); B63B 21/502 (2013.01)
Designated contracting state (EPC)
GB IE
DOCDB simple family (publication)
EP 0911482 A2 19990428; EP 0911482 A3 20020403; EP 0911482 B1 20041020; AU 8950298 A 19990513; BR 9804215 A 19991228; FI 982309 A0 19981026; FI 982309 A 19990428; NO 319687 B1 20050905; NO 984975 D0 19981026; NO 984975 L 19990428; OA 10906 A 20011011
DOCDB simple family (application)
EP 98308732 A 19981026; AU 8950298 A 19981026; BR 9804215 A 19981026; FI 982309 A 19981026; NO 984975 A 19981026; OA 9800203 A 19981027