LONDON -- ASRY Offshore Services (AOS) has completed its first major contract, the upgrading and repair of Hercules Offshore's jackup drilling rig Hercules 170.
The jackup arrived at ASRY's shipyard in Bahrain in the second half of 2008 for a work package that included a number of upgrades to increase its performance and drilling capabilities.
The original work package on the drilling rig included:
• Removal of existing 25-metric-ton (28-ton) crane and pedestal on the portside of the rig, design and installation of new crane pedestal external to the hull, installation of new 50-metric-ton (55-ton) Patriot offshore crane and jib, plus associated work
• Removal of existing crane pedestal on the starboard side, installation of new modified crane pedestal and 50-metric-ton (55-ton) Le Tourneau offshore crane and jib
• Installation of additional fifth diesel-generator, conversion of existing electrical store into new generator room, complete with fire detection and suppression equipment, and connection of new generator to the rig's existing switchboard
• Modifications to rigs existing lifeboats and davits, as well as access platforms and embarkation areas
• Sub-division of one existing mud pit into two areas, each with individual pumping, suction lines, and agitators
• Installation of new mud lines from pits to shale shakers
• Repositioning of three main mud pumps and modification of high pressure mud pipelines, electrical systems, and ventilation trunks
• Installation of two new high pressure mud lines to the drill floor
• UHP water blasting of hull bottom and sides and painting.
The company drydocked the rig after a diver inspection of the jackup revealed problems with the spud cans. AOS carried out repairs to the spacers between the spud cans and the spuds and contact damage, over an eight-day period.