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Operation & Monitoring of Trans-Alaska Pipeline Wes Tonkins Engineering Advisor Alyeska Pipeline Service Company

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Page 1: Operation & Monitoring of Trans-Alaska Pipeline · Alyeska Pipeline Service Company. Operation n Operating Gradients n Minimum Required Pressure ... • Sleeve to Maintain MOP •

Operation & Monitoring ofTrans-Alaska Pipeline

Wes TonkinsEngineering Advisor

Alyeska Pipeline Service Company

Page 2: Operation & Monitoring of Trans-Alaska Pipeline · Alyeska Pipeline Service Company. Operation n Operating Gradients n Minimum Required Pressure ... • Sleeve to Maintain MOP •

Operation

n Operating Gradientsn Minimum Required Pressure Criteria

(MOP)

Page 3: Operation & Monitoring of Trans-Alaska Pipeline · Alyeska Pipeline Service Company. Operation n Operating Gradients n Minimum Required Pressure ... • Sleeve to Maintain MOP •
Page 4: Operation & Monitoring of Trans-Alaska Pipeline · Alyeska Pipeline Service Company. Operation n Operating Gradients n Minimum Required Pressure ... • Sleeve to Maintain MOP •
Page 5: Operation & Monitoring of Trans-Alaska Pipeline · Alyeska Pipeline Service Company. Operation n Operating Gradients n Minimum Required Pressure ... • Sleeve to Maintain MOP •
Page 6: Operation & Monitoring of Trans-Alaska Pipeline · Alyeska Pipeline Service Company. Operation n Operating Gradients n Minimum Required Pressure ... • Sleeve to Maintain MOP •
Page 7: Operation & Monitoring of Trans-Alaska Pipeline · Alyeska Pipeline Service Company. Operation n Operating Gradients n Minimum Required Pressure ... • Sleeve to Maintain MOP •
Page 8: Operation & Monitoring of Trans-Alaska Pipeline · Alyeska Pipeline Service Company. Operation n Operating Gradients n Minimum Required Pressure ... • Sleeve to Maintain MOP •

Monitoring

n Settlementn Corrosionn Data Analysis

Page 9: Operation & Monitoring of Trans-Alaska Pipeline · Alyeska Pipeline Service Company. Operation n Operating Gradients n Minimum Required Pressure ... • Sleeve to Maintain MOP •

Monitoring

n Settlement• Curvature Pig

Page 10: Operation & Monitoring of Trans-Alaska Pipeline · Alyeska Pipeline Service Company. Operation n Operating Gradients n Minimum Required Pressure ... • Sleeve to Maintain MOP •
Page 11: Operation & Monitoring of Trans-Alaska Pipeline · Alyeska Pipeline Service Company. Operation n Operating Gradients n Minimum Required Pressure ... • Sleeve to Maintain MOP •

Monitoring

n Settlement• Curvature Pig• Deformation Pig

Page 12: Operation & Monitoring of Trans-Alaska Pipeline · Alyeska Pipeline Service Company. Operation n Operating Gradients n Minimum Required Pressure ... • Sleeve to Maintain MOP •
Page 13: Operation & Monitoring of Trans-Alaska Pipeline · Alyeska Pipeline Service Company. Operation n Operating Gradients n Minimum Required Pressure ... • Sleeve to Maintain MOP •

Monitoring

n Settlement• Curvature Pig• Deformation Pig

• Monitoring Rods

• Thermistors

Page 14: Operation & Monitoring of Trans-Alaska Pipeline · Alyeska Pipeline Service Company. Operation n Operating Gradients n Minimum Required Pressure ... • Sleeve to Maintain MOP •

Monitoring

n Corrosion• Ultrasonic Pig

– Prioritize Digs & Visual Inspection

Page 15: Operation & Monitoring of Trans-Alaska Pipeline · Alyeska Pipeline Service Company. Operation n Operating Gradients n Minimum Required Pressure ... • Sleeve to Maintain MOP •
Page 16: Operation & Monitoring of Trans-Alaska Pipeline · Alyeska Pipeline Service Company. Operation n Operating Gradients n Minimum Required Pressure ... • Sleeve to Maintain MOP •

Monitoring

n Corrosion• Ultrasonic Pig

– Prioritize Digs & Visual Inspection

• Cathodic Protection (CP) Readings• Corrosion Coupons

Page 17: Operation & Monitoring of Trans-Alaska Pipeline · Alyeska Pipeline Service Company. Operation n Operating Gradients n Minimum Required Pressure ... • Sleeve to Maintain MOP •

Monitoring

n Data Evaluation• Pressure De-rates (Rstreng)

– Rstreng Analysis of Visual Inspection

• Sleeve to Maintain MOP• Buckling Analysis

– Curvature / Corrosion - SAFE Program

Page 18: Operation & Monitoring of Trans-Alaska Pipeline · Alyeska Pipeline Service Company. Operation n Operating Gradients n Minimum Required Pressure ... • Sleeve to Maintain MOP •

Summary

n State of the Art monitoring toolscombined with data evaluation byexperienced personnel ensure that theMOP requirements are maintained forall operating scenarios of the Trans-Alaska Pipeline