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


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


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


CALIPER SENSING DEVICE

Slide 5

Caliper armswith processing boardand embedded sensor


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


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


TEST IMPLEMENTATION

Slide 8


FIELD TEST EXECUTION – Pig Launching

Slide 9

8 km 12” pipeline, inspected also with commercial conventional caliper


FIELD TEST EXECUTION – Pig Receiving

Slide 10


FIELD TEST EXECUTION – Data visualization

Slide 11


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


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

SPE 171986 A novel fully plastic caliper pig for low-risk pipeline inspection Design,...

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