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• W2023892584 abstract "Abstract Chevron s Gulf of Mexico Business Unit faced unprecedented challenges following Hurricanes Katrina and Rita. Storm surge and high winds toppled 13 platforms and 11 caissons as well as damaging six other platforms to the point of condemnation. Associated pipelines totaling 73 miles were also impacted. In addition, 132 active and inactive wells associated with the toppled platforms and caissons needed to be plugged and abandoned. None of the wells were in their customary upright condition. Traditional abandonment practices in such a situation would be extremely diver intensive and extremely hazardous. Safety and completing the work incident free was a priority. Extensive planning efforts were undertaken to minimize diver exposure. Unique challenges were posed by the toppled structures, and their associated debris fields, as the mechanical configuration of the structure, as well as the nature and extent of the debris field, was needed to develop an effective removal plan. Another problem was potential energy stored in bent or deformed structural members and pipes. Therefore, innovative approaches were developed and new technology applied to reduce the safety exposure and improve efficiency in removing toppled structures and debris. 3-D modeling technology was used to aid in site assessment and work planning, new hydraulic shear technology was developed for cutting structural members and conductors, high pressure abrasive cutting technology was adapted from the North Sea, and a pipeline strong back was developed to control stored energy in pipelines. The tools were designed to be placed in position by a diver but operated from the surface, keeping the diver out of the line of fire. The tools and practices developed contributed to a relatively low on the job injury rate. An additional benefit was that many of the tools and practices can be used in routine abandonment operations to reduce diver exposure and improve efficiency. Introduction Chevron s Gulf of Mexico Business Unit (GOMBU) had several toppled production platforms and damaged wells as a result of Hurricane s Katrina and Rita in August and September 2005. The extent of the damage was13 platforms and 11 well caissons toppled6 platforms damaged to the point of condemnation73 miles of associated pipelines132 active and inactive wells associated with the toppled/damaged platforms and caissons requiring plugging and abandonment (P&A)66 temporarily abandoned (TA) wells required surface casing and conductors severed and pulled Large debris fields were associated with the toppled and damaged structures. This debris included decks and structural members as well as the material and equipment on the decks. In addition, a few wells were leaking hydrocarbons to the waters of the Gulf of Mexico." @default.
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• W2023892584 date "2008-04-15" @default.
• W2023892584 modified "2023-09-26" @default.
• W2023892584 title "Technology and Innovations Contribute to Safety and Efficiency in Storm Disaster Recovery" @default.
• W2023892584 doi "https://doi.org/10.2118/111563-ms" @default.
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