jess+escandor+-+pipeline+pigging

7/25/2019 Jess+Escandor+-+Pipeline+Pigging

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Gas Speak Colloquium

Pipeline Pigging

Jessica Escandor

13th September 2011


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Overview

Introduction to pigging: a s

Why do we do it?

Licence 8b project


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Pi in What?

In-line inspection of pipelinePIG: Pipeline Inspection Gauge

Different pigs, different objectives, e.g.:

Cleaning Data collection

Pipeline inspection without disrupting gas flow


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Pi in Wh ?

Part of integrity management: Collect data on entire pipeline

= Validate structural integrity

Regular inspections


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Pi in How?

Pushed along by gas flow

Launcher (insert)


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Pi in Run

Normal operation


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Pi in Run

Normal operation


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Pi in Run

Depressurise launching chamber nser p g


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Pi in Run

Pressurise launching chamber repare or aunc


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Pi in Run

Start to Launch Open chamber isolation valve Close bypass valve Gas flows through chamber


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Pi in Run

Launch g eaves c am er


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Pi in Run

Pig is travelling as ow as norma


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Pi in Run

Ready to receive as ow roug c am er


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Pi in Run

Receive g s so a e n e c am er


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Pi in Run

Depressurise chamber e r eve p g


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Licence 8b Pro ect

Pigging operation of Licence 8b pipelineAim: conduct intelligent pigging

Intelligent = can record data

Includes: Pigging runs

Validation digs

Multi-disciplinary team Engineering, Projects, Operations, Response &

Control, Mapping, Commercial, Pigging vendor


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Licence 8b Pi eline

From Hexham to Kooragang Island (NSW)~12km of DN350 pipe

Issues:

Goes through swamp/mangrove and under river Difficulties with access

Supplies the largest gas customer in NSW

Never been pigged before


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Licence 8b - Pi in

Use different pigs: 1s : Foam pig

2nd: Gauge pig

: n e gen p g

e resu ts o t e rst two runs w eterm nethe intelligent pig can be used


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Licence 8b - Pi in

Foam pig: Wrapped polyurethane sections

Designed to disintegrate if there are serious issues


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Licence 8b - Pi in

Gauge pig: Aluminium gauge plate

Designed to deform due to impact with obstructions

o yure ane scs pus con am nan s ou o e p pe

- Cleans pipeline for intelligent pig


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Licence 8b - Pi in

Intelligent pig: XYZ co-ordinates

Corrosion


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Licence 8b - Results

Raw data interpreted by pigging vendor Results returned to Jemena

Validation digs

Expose 2 locations Compare pigging data with reality

Validate results


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Use of Results

Corrosion assessment Assess effect on pressure containment

Predict rate

Integrity Digs Long term program to monitor/repair corrosion

e ects over t me


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Im ortance of i in

Effective way to retrieve data on the entirep pe ne

Part of integrity management

Helps Jemena to ensure safe, continuous supplyof gas


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Thank You

Questions?

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