SPE A novel fully plastic caliper pig for low-risk pipeline inspection Design, Characterization and Field Test A. Di Lullo, A. Tasso, eni M. Cocuzza, M. Pirola, Politecnico di Torino G. Canavese, Istituto Italiano di Tecnologia

Paper A novel fully plastic caliper pig for low-risk pipeline inspection Alberto Di Lullo BUSINESS OBJECTIVES Slide 2 Mitigate the risk inherent in pigging by 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 Field tested Patented e-splora™ eni Systems for Pipeline Low Operating Risk Assessment

Paper 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 A novel fully plastic caliper pig for low-risk pipeline inspection Alberto Di Lullo DIFFERENT IMPLEMENTATIONS BASED ON NEEDS Slide 4 Attachment to a conventional polly pig With a bypass to perform chemical analyses Without polly body “skeleton” pig Add-on to an existing pig High velocity or improved corrosion assessment Large liquid volumes unacceptable at the plant

Paper A novel fully plastic caliper pig for low-risk pipeline inspection Alberto Di Lullo CALIPER SENSING DEVICE Slide 5 Caliper arms with processing board and embedded sensor

Paper 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 minutes60 minutes80 minutes Deformation Caliper response Lab device response Invariant response along time

Paper A novel fully plastic caliper pig for low-risk pipeline inspection Alberto Di Lullo TEST IMPLEMENTATION Slide 7 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 A novel fully plastic caliper pig for low-risk pipeline inspection Alberto Di Lullo TEST IMPLEMENTATION Slide 8

Paper 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 A novel fully plastic caliper pig for low-risk pipeline inspection Alberto Di Lullo FIELD TEST EXECUTION – Pig Receiving Slide 10

Paper A novel fully plastic caliper pig for low-risk pipeline inspection Alberto Di Lullo FIELD TEST EXECUTION – Data visualization Slide 11

Paper 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 elements Detected by the commercial 1-channel caliper Detected by the new foam 6-channels caliper Launch / receiving traps22 Valves56 T-junctions44 Horizontal curves (yaw) 10** 19 Vertical curves (pitch)6 Concentric welds6>800 Possible ovalizations02 Pipe elevation changes-4

Paper 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 use Comparatively 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, eni M. Cocuzza, M. Pirola, Politecnico di Torino G. Canavese, Istituto Italiano di Tecnologia

CALIPER SENSING DEVICE – Laboratory test at 5 Hz Slide 15 Deformation Caliper response Lab device response Accurate response of the sensing arms

CALIPER SENSING DEVICE – Laboratory test at 100 Hz Slide 16 Deformation Caliper response Lab device response Some harmonics emerge at high frequency