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Started By
Message
re: Proposal for making the cofferdam effective
Posted on 5/14/10 at 12:38 pm to Sid in Lakeshore
Posted on 5/14/10 at 12:38 pm to Sid in Lakeshore
quote:
Before they "wet parked" the coffer damn, they had rov's scraping the methane hydrates off the structure so that it would not go mobile as it had basically achieved neutral buoyancy
excuse the interruption, there were enough methane gas bubbles on the 200,000 Lbs metal cover to make it float?
1
Posted on 5/14/10 at 2:48 pm to Tommy Patel
Not float
the hydrate deposition made it unstable due to increased buoyancy in the cofferdam's head space
so when they tried to set it they were unable to hold it steady and fit the side cut out over riser laying down
they were afraid they would drop the box on the riser and rupture it even further making an even larger hole in the riser
the hydrate deposition made it unstable due to increased buoyancy in the cofferdam's head space
so when they tried to set it they were unable to hold it steady and fit the side cut out over riser laying down
they were afraid they would drop the box on the riser and rupture it even further making an even larger hole in the riser
Posted on 5/22/10 at 5:22 pm to TigerFred
reply from them:
quote:
Thank you so much for taking the time to think about and submit your proposed solution regarding the Horizon incident. Your submission has been reviewed for its technical merits. A similar approach has already been considered or planned for possible implementation. All of us on the Horizon Support Team appreciate your thoughts and efforts.
Sincerely yours,
Horizon Support Team
Posted on 5/22/10 at 6:50 pm to supatigah
Why did they try such a RIGID dome?
Why not something like an upside-down funnel shaped tent made of flexible material (Kevlar?) anchored down by really heavy weights around its perimeter?
Why not something like an upside-down funnel shaped tent made of flexible material (Kevlar?) anchored down by really heavy weights around its perimeter?
Posted on 5/22/10 at 10:21 pm to Rex
dunno Rex
we cant figure out why the cofferdam had a rigid top. Why didnt it have a swing lid or at least a large hatch at the top for the cofferdam to slide through the hydrates. Then when they got it set they could start pumping and close the hatch
we cant figure out why the cofferdam had a rigid top. Why didnt it have a swing lid or at least a large hatch at the top for the cofferdam to slide through the hydrates. Then when they got it set they could start pumping and close the hatch
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