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‘There We Go’ – Lifting 25,000 tonnes in 9 seconds | Brent Bravo Lift - YouTube
Channel: Shell
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forty years ago no one really thought
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about how they were going to be
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dismantled after decades of service the
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for Brent field platforms are being
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decommissioned we got Nassif to come and
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give us a hug
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and they were blown away with what we
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were doing we needed to be able to lift
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the platform up for underneath it was
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never designed to be listed in that
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manner
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in 2017 she'll set a world record when
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Brent Delta was lifted intact and taken
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away for recycling shelves ID which was
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the right idea just bring it in the
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whole lot as it stands now it's Bravo's
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turn
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you've done it once how are you gonna do
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it again and how are you gonna do it
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better and that's the challenge that we
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accept the team so how do you turn
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twenty five thousand tonnes of steel
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into this in a remote area of the North
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Sea engineering history is being made
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the discovery of the Brent oil and
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natural gas field in the 1970s had a
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crucial impact on Britain's economy
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now Brent field has come to the end of
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its life shell is rising to a new
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challenge safely dismantling its four
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huge platforms there's three main
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elements of decommissioning one is
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isolating the reservoir and we do that
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what's called plug-in abandonment so so
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we basically seal all of the wells so
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that at no point can the hydrocarbons
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come out of the reservoir to surface the
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next element is we have to get everyone
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off the platforms
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the final stage is dismantling and the
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decision was made not to attempt this on
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site but to remove the entire upper
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platform the topsides has one unit we
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lift the top sides and we transport them
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to shore and there we dismantle and then
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as much as possible to try and recycle
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so Delta for instance we're managing to
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recycle over 97 percent
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[Applause]
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the whole Bravo lived has been
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streamlined to give us 70 percent
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reduction in preparation work we look
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back on doubt sure and said okay
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it was success but how can we do it even
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better so that then when we come to do
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it for Bravo there was less work
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offshore so it was safer it was more
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efficient and it really meant that the
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overall removals part of the project was
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you know a step change
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[Music]
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we learned so much from how we lifted
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the Delta and when we came to the Bravo
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we changed tax lately we went for a
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slightly different method that before it
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was better safer Bravo is firmly fixed
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to its 150 meter high base a new method
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was developed to cut it free without
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installing the steel bracing used in
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Delta to maintain both like the strength
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and stability of the platform shell and
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their partners came up with the idea of
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putting in share keys so this was done
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by poor drilling into the concrete walls
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of the legs this core was then removed
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and a 300 kilogram steel shear key was
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put in its place once these were all in
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place a diamond wire cutter was then put
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in between each key and this then cut
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through the concrete wall
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Chickie's play a vital role in securing
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the platform we've got the gravity
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downwards force that holds us but the
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shear Keys also help us from a sideways
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perspective if we have any large waves
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that come through here in the height of
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the winter around the spring and those
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Shakey's hold us in position and stop
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any sideways or lateral force
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six reinforced lifting points are also
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installed we learned a lot from dela
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there was a lot of welding involved
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without kind of project on Bravo we did
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the concrete left points so this reduce
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a lot of the welding under deck and yeah
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reduce the man-hours - so a lot less
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risk of someone getting into it during
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the work unwanted equipment is cleared
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away we've been going around the whole
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platform bit by bit and as you can see
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that the platform is looking quite bare
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now and lots of things have been back
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loaded by vessel on going back to shore
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the crew prepares to leave or down man
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the Dayman process over the next week is
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all about making the platform safe and
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tidy in preparation for the left and so
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we get to a point where we have the what
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we call the golden chopper which is the
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final chopper that leaves the platform
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as the chopper arised rule TPS which is
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to all platforms shotgun so be in their
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control room push the final button and
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then walk up to the chopper and get on
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the chopper
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that's awesome when people get on that
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final chopper and it flies away
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that's quite an emotional thing we are
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saying goodbye to an iconic platform
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here
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[Music]
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[Music]
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the world's largest construction vessel
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the pioneering spirit arrives at Brent
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field its unique twin hull design went
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hand-in-hand with the development of
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shells single lift concept so as we
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approach the field we slow down and Emma
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were balancing down at the same time so
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going deeper into the water because
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we've got to fit underneath the platform
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positioning the giant ship takes four
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hours my job is to ensure that
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procedures are all followed and then I
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give the go-ahead for the next stage of
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the procedure to commence from now we're
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on a standoff position outside the
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500-meter zone the next step is to move
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in the close proximity around the
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platform go underneath the platform
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mister the bowels of the ship connect
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all of the lift points and then the next
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stop will be ready to fast lift
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[Music]
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this whole operation requires very close
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coordination between a number of
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different departments so one is the
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marine department so the people who
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drive the vessel if you like one is
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dynamic position in department so the
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people that control the thrusters that
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keep the vessel and steady and then we
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have the ballasting Department so these
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these are the people who manage and
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ensure that the ship's weight stays
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constant or according to plan so it
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doesn't go left to right up or down and
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and then we've got the people who manage
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the topside lift system itself so the
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coordination of those four departments
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is absolutely key in this and that's why
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they're all in the one big area on the
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bridge that's a very large bridge but
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it's actually four different departments
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working together pinpoint accuracy is
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needed to avoid coming into contact with
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Bravo's legs but all weather conditions
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that we plan to do the lift we don't
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want the ship to move by more than plus
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or minus half a meter which comes for
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the wind waves wave direction so that's
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all caused into the limitation of doing
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the lift
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pioneering spirit deploys cutting-edge
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technology to connect its lifting arms
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to Bravo the innovation of the dynamic
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position in the active cave conversation
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which allows a ship that's moving in the
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world to connect to something that's
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fixed it's impressive
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within now for me
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most people coming down the stairs so
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it's gonna happen soon here we go
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[Music]
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twenty-five thousand tons is lifted in
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just nine seconds there we go
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absolutely brilliant when years of work
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fell together and everything works at
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the time when it tested the final stage
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of Bravo's journey is about to begin
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once we've lifted the top sights that's
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the point of no return but she can't put
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the topsides back down again so
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basically we have a clock that starts to
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tick we have to say fasten the top
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sights or it's stable as we transport
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and then we'll turn around and install
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the leg cups with the navigational aids
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that has to be done including the 32 I
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will travel wind or fall within a 72
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hour period a 700 kilometer voyage lies
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ahead but the giant pioneering spirit
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won't be taking Bravo all the way the
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pioneering spirit sails down from the
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Brent fjord to Ward's Hartlepool and
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there we carry out a transfer operation
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where the Iron Lady which is a enormous
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barge in itself comes and essentially
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docks within the pioneering spirit
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structure and the two vessels work
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together so that the brim for a vote
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oxides will be landed on top of the Iron
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Lady
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the Bravo is loaded onto the Iron Lady
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by pumping out thousands of gallons of
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water ballast from the pioneering spirit
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reducing the ship's height by as much as
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18 meters
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then all C's need to tow in the Iron
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Lady barge through the seats and channel
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towards the able facility now the barge
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doesn't have its own propulsion so we
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need four tugs to basically maneuver it
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down this channel safely with the
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topside sitting on top of it at the
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right title condition so that we can
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sell all the way in in one operation and
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then all seas will maneuver in and more
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alongside the key our table
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the barge is just coming in and we're
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trying to line up in the middle of the
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barge with that yellow stick so the
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gentleman standing with the radial green
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hat blue coveralls
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he's the barge master he's in control
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the only guy that's communicating to the
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four tugs and a moment with her
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maneuvering into the right place we have
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to get this very accurate because we're
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going to install the bridges to bring
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the whole lot down it takes 10 hours to
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push the Bravo ashore
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so that recycling can begin she'll want
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to do things right let's recycle it
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let's dispose them correctly that's what
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they've done they've come variable and
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we promised them 98% the Brenna fields
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been obviously part of oil and gas
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history for 40 years and now it's
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amazing to see it both first we'll come
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onshore and then the way that it's been
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processed and essentially sent away
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again in smaller pieces to be recycled
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is already pretty impressive so
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recycling of history and just being part
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of that journey the final part of brand
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for me is like a massive like owner
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responsibility to take it apart to do
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that successfully and to show the
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industry that we can do a single lift
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and dismantlement
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