Case Study of a 300-ft Water Depth Jackup in a Class IV Hurricane

摘要

This paper examines the ability of a Levingston Class 111-Cjackup rig to withstand hurricane winds of 128 knots, whichsignificantly exceeds the rig’s 100-knot storm rating. It comparesthe analytical results of an engineering study focused onpredicted rig attitude, areas of failure, and areas of high stresswith the actual rig conditions observed.Details of the shipyard repair show how an innovative chordrepair method was used to dramatically decrease the cost ofrepairs and allow the rig to be returned to service in only 28 days.