Conductor systme design for a deep water jackup in cantilever mode ove rthe ETAP platforms

摘要

Increasingly,field, development sin hte 0 m -100 m depth range are utilising deep water,harsh environment jackups in cantilever mode over fixed platforms near to their operating limits.In such wate rdepths,it is possible tha thtere will be substaintial relative movement sbetwene hte jackup and ifxed paltform,under the action of environmental wind,wave and current loadinl.Any such relative movements cause very high loadings within the condictor systme,in the surface equipment and on hte jacket guides; indeed,such loadings are oftne in excess of those causd by environmetnal loading on the conductorsthemselves.Consequently,all of the above loadings must be accounted for in the design process,in apporpriate combinations.