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Unformatted text preview: gered in response to high gas levels on the rig was a possible contributing cause of the Deepwater Horizon explosion. 126 The Deepwater Horizon had multiple inspections and surveys that should have included the inspection of the engine overspeed shutdown devices. The panel has been unable to ascertain exactly when each overspeed device was tested. Accordingly, ABS indicated that it inspects 20% each year; however, neither ABS nor Transocean document which devices are tested to ensure that the same device is not tested each year and that all devices get tested within the rotation frequency. The failure of ABS and Transocean to document which devices are tested to ensure all devices are tested is a possible contributing cause of the DWH explosion. The emergency shut‐down response on a DP MODU utilizes a different operating philosophy than employed on moored MODUs. Instead of the single top level shutdown of all engines, the DP MODU rig is designed with an emergency disconnect capability from th...
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This note was uploaded on 01/18/2014 for the course BEPP 305 taught by Professor Nini during the Fall '11 term at UPenn.

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