Daniel Fielder

Design Engineer

FAST INTERVENTION TOOL

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

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

FIT (Fast Intervention Tool)

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.

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https://www.ogauthority.co.uk/data-centre/interactive-maps-and-tools/

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

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.

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.

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

Current Removal Method

Image courtesy of Chevron

Webtool Fast Intervention Tool

Injector

Diver Handles

Crimper

Deployment Shackles

Spiker

Cutter

Crimper

Lifter

Lifter

Accumulator

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

FIT Benefits

A single tool

Easy positioning

No leakage

Quick and easy

Multiple uses

The sealant is non toxic

Different pipe materials

Modular design

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

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.

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

Summary slide

Daniel Fielder, Design Engineer, Allspeeds Ltd (Webtool)

Email: dan.fielder@allspeeds.co.uk

www.allspeeds.co.uk

Any questions?

Thanks for listening Come and visit us at Stand 124