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Derrick Access Basket Foundations

Two hydraulic access baskets were required to be installed at racking board level on a later generation semi-submersible for racker maintenance.  Owing to the high utilization of the derrick structure, loads had to be distributed through the horizontal girts rather than directly into the leg but due to the derrick taper and congestion, the resulting design was especially unique in order to permit fast and effective installation by the rig crew offshore.