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Northern Pipelining: Challenges, Successes & Practical Maintenance Presentation

This presentation covers Enbridge's NW pipeline system overview, challenges, successes, maintenance, monitoring, inspection, integrity management, and the people behind it. The focus is on the 869km pipeline constructed from 1983-1985 with key features, design pressure, and throughput. The unique challenges of the "Northern" pipeline, including capital cost, geography, and permafrost, are discussed, along with Enbridge's experience applied to future development. Successes in Norman Wells, dealing with ice, permafrost challenges, and slope stabilization, are highlighted. Topics also include maintenance, monitoring activities, and the importance of field personnel contributing to community life.

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Northern Pipelining: Challenges, Successes & Practical Maintenance Presentation

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Presentation Transcript

  1. Northern Pipelining & Practical Experience Presentation to: APEGGA April 21, 2005 Calgary

  2. Topics • Enbridge (NW) Pipeline System Overview • “Northern” Pipeline Challenges and Successes • Maintenance and Monitoring • Inspection and Integrity Management • Reporting • The people that make it possible

  3. Constructed: 1983 – 1985 Diameter: 323.8 mm Length: 869 km Design: Limit States Features: 140 defined water crossings 2 major rivers 150 significant slopes ambient temperature pipeline Design Pressure: 9930 kPa Inuvik Norman Wells Wrigley Ft. Simpson Zama Quick Facts Enbridge (NW) Pipeline System

  4. Throughput: 30,000 BPD (4,800 m3/d) One shipper from Norman Wells to KP 839.2 Two shippers from there to KP 869 (Zama) Three (3) Pump Stations: 1 natural gas powered (NW) 2 diesel powered (WG & MC) Crude Characteristics: Density = 827 kg/m3 Pour Point = -50° Celsius RVP < = 103 kPag Viscosity = 2.0 cSt. Remote Operations from Edmonton Quick Facts Enbridge (NW) Pipeline System Aerial View of Norman Wells

  5. Inuvik Norman Wells Wrigley Ft. Simpson Zama “Northern” Pipeline Challenges Unique “Northern” P/L Issues • Capital Cost • Geography and Remote Access • Permafrost Enbridge Experience Applied to Future Development • Proven sub-surface construction in permafrost • Proven methods of monitoring pipeline integrity

  6. Norman Wells Successes: Design Innovation • Operating temperatures • Limit States Design • lower cost • strain limit 0.5% • Integrity monitoring

  7. Norman Wells Successes: Permafrost Challenges Met • Design • Environmental/ Geotechnical • Right of Way • trenching Ice Rich

  8. Norman Wells Successes: Slopes – Then and Now 1984 1997 • Design • Environmental/ Geotechnical • Right of Way • trenching • slope stabilization

  9. Conventional pipeline design and construction Region requiring design consideration for permafrost Experience:Permafrost Area of sporadic permafrost that requires minimal pipeline design and construction considerations for permafrost Map and Diagram from Geological Survey of Canada website

  10. Norman Wells Successes:Dealing with Ice • Design • Environmental/ Geotechnical • Right of Way • trenching • slope stabilization • thaw settlement / frost heave Ice lens

  11. Inertial Inspection Runs – GEOPIG

  12. Integrity Management inPermafrost • Geo-Pig

  13. Maintenance Activity – Pipe Replacement

  14. Maintenance Activities

  15. Maintenance Activities to Present

  16. Monitoring Activities

  17. Annual Reports Operations & Maintenance Activities Condition of Pipeline Terrain Monitoring Slope Monitoring and Performance Operations & Monitoring Program Right-of-way Assessment Reporting to Regulators

  18. Pipeline Maintenance • Hauling propane to remote area valve sites.

  19. Field Personnel • Employees are permanent residents of the communities of Norman Wells and Ft. Simpson. • They provide significant contributions to the quality of life in the communities through their volunteer activities. • Successful and enduring positive northern relationships are built and maintained on the basis of mutual honesty, respect and trust.

  20. Questions

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