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Rig : Schlumberger IPM
Operator : Gulf Drilling International
Design : MSC
Bima is a 4 legged Multi-Purpose Service Vessel designed for operations in S E Asia. After 4 years in service, cracks in the legs were discovered necessitating return of the rig to the building yard in Singapore. Rig Masters was the project and technical manager for the leg repairs plus numerous rig modifications. We supervised a detailed failure analysis to determine the cause of the weld failures. We also directed an extensive fracture mechanics assessment to justify repair of only about 50% of the defects while the rig continued drilling operations with no shutdown. Bima is currently still in service without any new defects or problems with those defects left unrepaired.