kim thye lee - subsea uk thye lee... · • no cost or risk of coating removal ... discovery image...
TRANSCRIPT
Knowing the Unknown:
DiscoveryTM Computed Tomography Scans Allow
Pipeline Integrity and Contents to be Visualised
Kim Thye Lee
Tracerco
Tracerco is part of Johnson Matthey (FTSE 100) Oil & Gas
A world leading technology company providing unique and specialised detection
and measurement solutions to our customers
Subsea services - Knowing the Unknown
• Integrity Inspection
• Pipelines
• Flooded Member
• Mid-water Arches &
Buoyancy Tank
• Flow Assurance Inspection
• Deposition Studies
• Stuck Pig Location
• PIG Tracking / Detection
• Density Profiler
• Radiation Monitoring
Product intro
video (26s)
Merge to live
footage (20s)
Applications
1. Pipeline Integrity
2. Flow Assurance
3. Pipeline Life Extension
4. Decommissioning
Pipeline Integrity - Unpiggable line
• 360-degree
wall thickness
map
Pipeline Integrity
wall thickness map
– multiple steps
over a 1-metre
section
Pipeline Integrity - Coated Pipeline
• 360-degree wall thickness map
• No cost or risk of coating removal
• Ovality of pipeline under coating
• Condition of coating and rebars
Pipeline Integrity - Coated Pipeline
• Void within asphalt/mastic field joint
coating
• Extends over full length of field joint
• No evidence of associated
external corrosion (yet)
Pipeline Integrity – Pipe-in-Pipe
• Outer pipe wall thickness
• Inner pipe wall thickness
• Inner pipe concentricity
• Annulus integrity
Pipeline Integrity – type of defect
Pipeline Integrity – type of defect
Pipeline Integrity – pipe bundles
• Outer carrier wall
thickness
• Wall thickness and
contents of each
inner pipe
• Deposition build-up
5-layer PP
insulated pipe
Pipeline Integrity – Piggyback Inspections
with piggyback
line
• Workscope was inspection of the main export line for
lifetime extension purposes
• Inspection of the piggyback line was not part of the
workscope
• ‘You don’t know what you don’t know’ – water lay-
down was detected in sections of the gas lift line.
Pipeline Integrity – piggyback inspections
Four steps to cost effective remediation
1. Locate deposits: Use ExplorerTM to identify the position – know WHERE it is
Flow Assurance Applications – Case Study
Four steps to cost effective remediation
1. Locate deposits: Use ExplorerTM to identify the position – know WHERE it is
Flow Assurance Applications – Case Study
Asphaltene @1.2g/ccDiscovery image of a clean PiP line
Four steps to cost effective remediation
2. Quantify and characterise it: use DiscoveryTM to identify the type and nature of
the deposition – know WHAT it is
Flow Assurance Applications – Case Study
Scale @2.3g/ccAsphaltene @1.2g/cc
Gas pockets
Four steps to cost effective remediation
2. Quantify and characterise it: use DiscoveryTM to identify the type and nature of
the deposition – know WHAT it is
Flow Assurance Applications – Case Study
Choose the correct remediation method and plan the
campaign with confidence
Four steps to cost effective remediation
3. Remediate efficiently and cost-effectively
Flow Assurance Applications – Case Study
Hydrate Formation
(borescope image)
Four steps to cost effective remediation
4. Use DiscoveryTM to monitor and optimise the effectiveness of the Remediation
Flow Assurance Applications – Case Study
Static – Water/Oil/Gas Flowing Conditions
Flow Assurance Applications – Case Study
Four steps to cost effective remediation
4. Use DiscoveryTM to monitor and optimise the effectiveness of the Remediation
Hydrate Blockage Hydrate Dissociation Hydrate Removed
Flow Assurance Applications – Case Study
Four steps to cost effective remediation
4. Use DiscoveryTM to monitor and optimise the effectiveness of the Remediation
Important to correctly target any remediation:
• Want to treat the actual problem
• Poorly targeted remediation can be worse than none!
• $10M
• Operator’s estimated cost to shutdown and chemically treat a
complex flow assurance issue
Case Study - Shell
Case Study - Hess
Delivering Value through Technology: Offshore Inspection Campaign Leverages
Subsea CT Scanning Technology
31Source: http://www.hess.com/docs/default-source/pdfs/summary-of-an-offshore-
inspection-campaign-with-subsea-ct-scanning-technology-for-hess.pdf?sfvrsn=2
Summary
• Obtain detailed integrity data of all types of pipe walls and complex pipelines
• Eliminate the cost and risk of removing coatings subsea
• Eliminate interruption to production and normal pipeline operations
• Visualise flow assurance issues online and non-intrusively, and characterise
the type of deposit
• Reduce costs on remediation campaigns by knowing the exact amount,
structure and type of deposits
• Endorsed by multiple industry awards in 2015