Source： Review：2055
The plan to dismantle these four enormous oil rigs in the North Sea, kicking off a one of the vastest and controversial decommissioning project ever in history。Brent is not the first North Sea field to be taken out of commission but it is one of the biggest and best known
After a decade of planning and consultation, removal of Brent field rigs built in 1970s could take up to 10 years to take out of the sea。Shell says the lift takes about 10 seconds
The estimates the cost of dismantling Brent oil rig alone will be in single digit billions of Dollars This platform is called Brent Delta, and it is in the North Sea England; One of the biggest oil rigs that has shut down and will be removed, under Shell’s plans, I have done many years of diving in these waters working on the Brent oil rigs, they are big and very impressive a lot of steel and concrete down there.
The Brent field rigs were built in the 1970s and produced around a tenth of the UK’s North Sea oil. But three of the four – Alpha, Bravo and Delta – have now shut down, and this summer the company will embark on a multibillion-pound eight- to 10-year project to remove the vast drilling and accommodation structures.
After the Brent Delta platform is decommissioned, only its 174m high legs will remain
Brent oil rig started pumping in 1976, is not the first field to be decommissioned in the North Sea, more than 100 miles north of Shetland in deep, hostile waters – together with the unusual concrete construction of three of the rigs pose a unique challenge.
The answer for this decommissioning job, is a vast ship currently moored in Rotterdam, Europe which will attempt to lift the entire 24,000-tonne topside of the Delta platform
To prepare the rig for lift-off around 1,500 people were working to reinforce the Delta platform, welding steel to strengthen it,
This vast ship is called Pioneering Spirit is the largest construction vessel ever built.
That has been a change in the industry. In the past platforms have been removed a small piece at a time,” Removing platforms in a single lift is a “large swing”,The platform will then be taken by ship to a former shipyard in Hartlepool England where most of the steel will be recycled and sold off.
Some people think Shell should leave the entire rig structures to be swallowed up by the waters. That the platforms should just be left, to one day become a reef for marine life, on
Over the next 30 years, almost all the 470 offshore installations, such as platforms, in the North Sea’s UK continental shelf will need to be decommissioned。
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