Geoffrey Maitland: 'Top kill' with heavy fluid could stem the flow

Share
Related Topics

The current solution is the so-called "top kill". Kill is the term used to stop the flow from the well and they're trying to do this by injection of fluids into the top of it.

The "blow out preventers" (BOPs), large valves designed to shut off the top of the wellbore when there's an incident, did not work fully. The plan is to counter the oil and gas pressure by injecting a heavy, high-density fluid into the well. Because the BOPs are partially open, the question is how much of the heavy density fluid will go down and how much is going to come up and flow out of the open BOPs. BP will try to pump enough of this heavy fluid in so that there is eventually a long enough column of fluid that exerts a downward pressure which is greater than that of the oil and gas which is trying to get out.

There's been quite a delay in getting ready for this. They have to take lines down from the drill ship to the sea bed and connect them up to the "kill and choke" lines below the BOPs using remotely operated vehicles. Getting this in place takes some time. They are now doing some small injections of fluid into the BOP to try to monitor at what pressures they need to inject.

If they can pump enough fluid in – and they keep emphasising that this has never been done at 5,000 feet below the sea – they should be able to stem the flow. That fluid will sit there, keeping the oil and gas at bay. They will then be able to displace some of the fluid at the top of the well with cement slurry which will set to create a permanent plug. The chances of creating further leaks with this operation are slim and would only occur if the kill and choke lines couldn't be closed again after the operation and became disconnected from the lines to the drillship. This worst-case scenario might then create another couple of leaks.

Geoffrey Maitland is professor of energy engineering at Imperial College, London

React Now

Latest stories from i100
Have you tried new the Independent Digital Edition apps?
iJobs Job Widget
iJobs General

Year 5 Teacher

£80 - £140 per day: Randstad Education Leeds: Year 5 Teacher KS2 teaching job...

Software Developer

£35000 - £45000 Per Annum Pensions Scheme After 6 Months: Clearwater People So...

Systems Analyst / Business Analyst - Central London

£35000 - £37000 per annum + Benefits: Ashdown Group: Systems Analyst / Busines...

Senior Change Engineer (Network, Cisco, Juniper) £30k

£30000 - £35000 per annum + Benefits: Ampersand Consulting LLP: Senior Change ...

Day In a Page

Read Next
 

i Editor's Letter: A huge step forward in medical science, but we're not all the way there yet

Oliver Duff Oliver Duff
David Cameron has painted a scary picture of what life would be like under a Labour government  

You want constitutional change? Fixed-term parliaments have already done the job

Steve Richards
Oscar Pistorius sentencing: The athlete's wealth and notoriety have provoked a long overdue debate on South African prisons

'They poured water on, then electrified me...'

If Oscar Pistorius is sent to jail, his experience will not be that of other inmates
James Wharton: The former Guard now fighting discrimination against gay soldiers

The former Guard now fighting discrimination against gay soldiers

Life after the Army has brought new battles for the LGBT activist James Wharton
Ebola in the US: Panic over the virus threatens to infect President Obama's midterms

Panic over Ebola threatens to infect the midterms

Just one person has died, yet November's elections may be affected by what Republicans call 'Obama's Katrina', says Rupert Cornwell
Premier League coaches join the RSC to swap the tricks of their trades

Darling, you were fabulous! But offside...

Premier League coaches are joining the RSC to learn acting skills, and in turn they will teach its actors to play football. Nick Clark finds out why
How to dress with authority: Kirsty Wark and Camila Batmanghelidjh discuss the changing role of fashion in women's workwear

How to dress with authority

Kirsty Wark and Camila Batmanghelidjh discuss the changing role of fashion in women's workwear
New book on Joy Division's Ian Curtis sheds new light on the life of the late singer

New book on Ian Curtis sheds fresh light on the life of the late singer

'Joy Division were making art... Ian was for real' says author Jon Savage
Sean Harris: A rare interview with British acting's secret weapon

Sean Harris: A rare interview with British acting's secret weapon

The Bafta-winner talks Hollywood, being branded a psycho, and how Barbra Streisand is his true inspiration
Tim Minchin, interview: The musician, comedian and world's favourite ginger is on scorching form

Tim Minchin interview

For a no-holds-barred comedian who is scathing about woolly thinking and oppressive religiosity, he is surprisingly gentle in person
Boris Johnson's boozing won't win the puritan vote

Boris's boozing won't win the puritan vote

Many of us Brits still disapprove of conspicuous consumption – it's the way we were raised, says DJ Taylor
Ash frontman Tim Wheeler reveals how he came to terms with his father's dementia

Tim Wheeler: Alzheimer's, memories and my dad

Wheeler's dad suffered from Alzheimer's for three years. When he died, there was only one way the Ash frontman knew how to respond: with a heartfelt solo album
Hugh Bonneville & Peter James: 'Peter loves his classic cars; I've always pootled along fine with a Mini Metro. I think I lack his panache'

How We Met: Hugh Bonneville & Peter James

'Peter loves his classic cars; I've always pootled along fine with a Mini Metro. I think I lack his panache'
Bill Granger recipes: Our chef's heavenly crab dishes don't need hours of preparation

Bill Granger's heavenly crab recipes

Scared off by the strain of shelling a crab? Let a fishmonger do the hard work so you can focus on getting the flavours right
Radamel Falcao: How faith and love drive the Colombian to glory

Radamel Falcao: How faith and love drive the Colombian to glory

After a remarkable conversion from reckless defender to prolific striker, Monaco's ace says he wants to make his loan deal at Old Trafford permanent
Terry Venables: Premier League managers must not be allowed to dictate who plays and who does not play for England

Terry Venables column

Premier League managers must not be allowed to dictate who plays and who does not play for England
The Inside Word: Brendan Rodgers looks to the future while Roy Hodgson is ghost of seasons past

Michael Calvin's Inside Word

Brendan Rodgers looks to the future while Roy Hodgson is ghost of seasons past