Tethered Inspection Platform for Large Diameter Pressure Pipelines Trenchless Technology Roadshow 2014 Cameron White, Pure Technologies, Bsc Eng Pipe Assessment Options Lower • Resolution • Reliability • Cost Desktop Study Soil Survey Test Pits External Leak Detection External Acoustic Pipe Wall Assessment Inline Leak Detection and CCTV Inline Acoustic Pipe Wall Assessment Inline Stress Pipe Wall Assessment Near Field Electromagnetic Higher • Resolution • Reliability • Cost Broadband Electromagnetic Remote Field Electromagnetic Magnetic Flux Leakage Sahara® Tethered Inspection Platform Sahara I vs Sahara II Copper Cable Fiber Optic Cable 1 Sensor Multiple Sensor Large Moving Box Truck Cargo Van Acoustic Pipe Wall Assessment Speed of Sound In a Fluid Filled Pipe V pipe 1 Structural Stiffness V pipe 2 Region of Peel ‐ 300 mm DIP Insertion Location Flow • Insert Picture of Control Centre CCTV Screen Shots Acoustic PWA Data Insertion P14 P9 P6 Validation Process Validation Results Acoustic PWA Conclusions Collected data was repeatable Joints are clearly seen No large defects were missed (good condition) • Largest Anomaly by area (Pipe 9) correlated with field verification • Other 2 anomalies caused by something other than wall loss. Stress Pipe Wall Assessment Relative Stress Changes Wall Loss Cracks Severe Bending and Compressive Forces Joints Pipeline Features Texas – 600 mm CI Overview • • • • • 2.6 km 3 insertions Pressure 90 psi Flow 2.2 ft/s 2 Leaks Debris Gate Vale Staining Metal Object Stress PWA Data Stress PWA Data Stress PWA Results Stress PWA Analysis was performed on 1.28 km (1 run) Repeatable Data Pipe Joints – 240 Individual Pipes 35 PWA Anomalies Identified eld Trials with validations are required to continue the development of the PWA technologies Thank You Trenchless Technology Roadshow Cameron White, Pure Technologies, Bsc Eng
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