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Daniel Fielder
Design Engineer
FAST INTERVENTION TOOL
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Webtool hydraulic cutters and systems
Tangye hydraulic jacks and lifting equipment
Millingford sub-surface sucker rod pumps
Kopp speed Variators
Blake Hydram self powered pump
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Webtool specialist projects
Pontoon Bridge decommissioning tool
Cable retrieval tool TALOS energy emergency winch cutter
IWOCS emergency disconnection tool
Sellafield pond decommissioning
Portable Electro-Hydraulic power pack
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FIT (Fast Intervention Tool)
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Rigid Flowline
Offshore wells and Fields
• In the UK alone there are over 12,000 offshore wells.
• The global network of oil fields is in excess of 65,000.
• The largest oil field producing in excess of 30 billion
barrels
• Pipes ranging from 3” to 16” in diameter and many kilometres
long.
• Usually made of carbon steel or high specification alloys with
corrosion resistant coatings.
Imag
e co
urt
esy
of
OG
A a
s o
f 2
01
8
https://www.ogauthority.co.uk/data-centre/interactive-maps-and-tools/
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Decommissioning a Growing Industry
Forecast from Oil & Gas UK
• Oil fields are being abandoned at an increasing rate. Thus the
demand for products that aid the decommissioning process will
rise.
• Different regions have varying regulations on the abandonment
and decommissioning of the fields Image courtesy of OGA as of
2018
https://oilandgasuk.cld.bz/Decommissioning-Insight-2018/26/#zoom=z
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Decommissioning Expenditure
Offshore expenditure in the future
The estimated expenditure for removing subsea pipes and
infrastructure accounts to around 12% of the total cost
decommissioning.
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State of Pipe Once Abandoned
Decommissioning the Pipe
Hazardous live product, residue and scale are the remaining
contaminants left inside the pipe once it has been shut off.
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Decommissioning Preparation
Pigging
This process consists of scraping the insides of the pipe using
a billet/ “pig”. To do this the pig is loaded in one end of the
pipeline, then the pipe is sealed to create a vacuum.
A suitable gas is pumped in behind the pig to project it down
the pipeline and scrape away the residue.
https://www.e-education.psu.edu/marcellus/node/684
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Current Removal Method
Image courtesy of Chevron
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Webtool Fast Intervention Tool
Injector
Diver Handles
Crimper
Deployment Shackles
Spiker
Cutter
Crimper
Lifter
Lifter
Accumulator
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How Does it Seal the Pipe?
The stages for the FIT are as follows:- • The pipe is lifted
from the sea bed • The crimps squeeze the pipe closed to create a
cavity • The spike pierces the pipe between the crimps • The
injector fills the cavity with the sealant • The cutter splits the
pipe, thus creating another crimped point
Crimp Crimp Cut Injection
Sealant Sealant
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FIT Benefits
A single tool
Easy positioning
No leakage
Quick and easy
Multiple uses
The sealant is non toxic
Different pipe materials
Modular design
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Current stage
10/5/19 Sea trails
14/2/19 Ready for
further testing
12/2/19 System
integration test
Complete to final testing
iteration
15/12/18 Test and
Chevron Visit
13/12/18 Complete
manufacture for testing purposes
27/8/18 Design
approval
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Testing
A leak test has been performed up to 75 bar. This is to see if
any water could be forced past the sealant (to resemble sub sea
pressure). The test was a success as there wasn’t a single drop of
water that passed through.
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Future for the FIT
The FIT prototype has been designed to accommodate the X65 -
4.5” pipe. Once all tests have been approved work will begin on:- •
Design and manufacture on the final iteration • Acceptance of
varying sizes of pipe • Separating the modules to for other uses •
Optimisation of the size of the assembly and weight • Automated
control system • Other features • Deeper achievable depths
Offshore trials Q2 2019. Prototype project completion date, June
2019
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Summary slide
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Daniel Fielder, Design Engineer, Allspeeds Ltd (Webtool)
Email: [email protected]
www.allspeeds.co.uk
Any questions?
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Thanks for listening Come and visit us at Stand 124
