SPE 171986 A novel fully plastic caliper pig for low-risk pipeline inspection Design,...
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Transcript of SPE 171986 A novel fully plastic caliper pig for low-risk pipeline inspection Design,...
SPE 171986
A novel fully plastic caliper pig forlow-risk pipeline inspection
Design, Characterization and Field Test
A. Di Lullo, A. Tasso, eniM. Cocuzza, M. Pirola, Politecnico di TorinoG. Canavese, Istituto Italiano di Tecnologia
Paper 171986 • A novel fully plastic caliper pig for low-risk pipeline inspection • Alberto Di Lullo
BUSINESS OBJECTIVES
Slide 2
Mitigate the risk inherent in piggingby transforming low-risk pigs into inspection tools
Detect major restrictions before pigging
Detect and localize changes of average ID(e.g. due to deposits or pipe deformations)
Detect and localize pipe deformations (“caliper”)and estimate inner wall roughness
Measure pipeline thickness(basic MFL functionality)
Ready
Ready
Fieldtested
Patented
e-splora™eni Systems for Pipeline Low Operating Risk Assessment
Paper 171986 • A novel fully plastic caliper pig for low-risk pipeline inspection • Alberto Di Lullo
LOW-RISK PIGGING ROAD-MAP
Slide 3
Line never pigged e-splora™ ILI (if appropriate)
Foam Pigs normally pose very low risk due to:
Negligible capability to displace solids
Capability to negotiate restricted pipeline regions
If blocked, can be broken by small pressure differences
Even foam pigs may be risky or pose operational problems
Presence of almost complete restrictions pre-pig inspection
Displacement of huge amounts of liquids “skeleton” implementation
Paper 171986 • A novel fully plastic caliper pig for low-risk pipeline inspection • Alberto Di Lullo
DIFFERENT IMPLEMENTATIONS BASED ON NEEDS
Slide 4
Attachmentto a conventional
polly pig
With a bypassto perform chemical
analyses
Without polly body“skeleton”
pig
Add-on to anexisting pig
High velocityor improved
corrosion assessment
Large liquid volumesunacceptableat the plant
Paper 171986 • A novel fully plastic caliper pig for low-risk pipeline inspection • Alberto Di Lullo
CALIPER SENSING DEVICE
Slide 5
Caliper armswith processing boardand embedded sensor
Paper 171986 • A novel fully plastic caliper pig for low-risk pipeline inspection • Alberto Di Lullo
CALIPER SENSING DEVICE – Fatigue test at 20 Hz (example)
Slide 6
beginning 20 minutes 60 minutes 80 minutes
Deformation Caliper response Lab device response
Invariant response along time
Paper 171986 • A novel fully plastic caliper pig for low-risk pipeline inspection • Alberto Di Lullo
TEST IMPLEMENTATION
Slide 7
1 3 2 4 5
Two systems:
(1) Polly pig vector
(2) Buried Anchor disc (*)
(3) Connector
(4) PCB enclosure
(5) Sensing arms
(*) for the test, the plastic components had to be the mechanically weakest section to assess their robustness
Paper 171986 • A novel fully plastic caliper pig for low-risk pipeline inspection • Alberto Di Lullo
TEST IMPLEMENTATION
Slide 8
Paper 171986 • A novel fully plastic caliper pig for low-risk pipeline inspection • Alberto Di Lullo
FIELD TEST EXECUTION – Pig Launching
Slide 9
8 km 12” pipeline, inspected also with commercial conventional caliper
Paper 171986 • A novel fully plastic caliper pig for low-risk pipeline inspection • Alberto Di Lullo
FIELD TEST EXECUTION – Pig Receiving
Slide 10
Paper 171986 • A novel fully plastic caliper pig for low-risk pipeline inspection • Alberto Di Lullo
FIELD TEST EXECUTION – Data visualization
Slide 11
Paper 171986 • A novel fully plastic caliper pig for low-risk pipeline inspection • Alberto Di Lullo
FIELD TEST EXECUTION – Data processing
Slide 12
** the single channel commercial caliper cannot provide this information
Pipeline elementsDetected by the
commercial1-channel caliper
Detected by the new foam
6-channels caliper
Launch / receiving traps 2 2
Valves 5 6
T-junctions 4 4
Horizontal curves (yaw)10**
19
Vertical curves (pitch) 6
Concentric welds 6 >800
Possible ovalizations 0 2
Pipe elevation changes - 4
Paper 171986 • A novel fully plastic caliper pig for low-risk pipeline inspection • Alberto Di Lullo
CONCLUSIONS
Slide 13
• Design and prototype of a new low-cost and low-risk plastic caliper pig
• Potential to detect, locate and measure inner diameter changes, roughness changes and chemical properties (salinity and pH)
• Compatible with operationally flexible and frequent useComparatively cheap and easy replacement of damaged parts
• Laboratory test of the new sensing elements with good results
• Field test in a 12”, 8km pipeline in Italy and comparison with a single-channel commercial caliper pig
• The field test demonstrated the effectiveness and potential of the new Caliper Smart Foam Pig
Thank You for your kind attention
Any question ?
Slide 14
A. Di Lullo, A. Tasso, eniM. Cocuzza, M. Pirola, Politecnico di TorinoG. Canavese, Istituto Italiano di Tecnologia