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Acoustic Pipeline Inspection

Mind The Gap

Mike Liddell

Chief Surveyor, Fugro Survey Limited

UUVS @ Oceanology 2012

13th March 2012

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Contents Menu

Introduction to Pipeline Inspection

The Current Toolkit

ROV & ROTV

Shallow Water Solutions

ROTV New Capabilities

Deep Water Solutions

AUV Capabilities

Reporting and Processing

Delivery of Results

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Pipeline Inspection

Deployment of the Best Technical Solutions has cemented position as the

provider of pipeline inspection survey services

– Best Technical Solutions

• Best Survey Platforms

• Best Survey Sensors and Hardware

• Optimised Acquisition and Processing Software

• Integrated Data Delivery Tools

• Experienced Inspection Personnel

– Backed up by a commitment to annual training

• Overseen by dedicated Project Management

Two distinct yet complementary offerings

– ROTV based Sonar Inspection (Acoustic Pipeline Inspection)

– ROV based Visual Inspection

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The Current Pipeline Inspection Toolkit

ROTV

Rapid Assessment Tool

Span Determination

Burial Status

Displacement and Debris

140 km per day

Sonar based payload

ROV

In-depth Engineering Tool

Quantitative Measurements

Span Measurements

Depth of Burial

25 km per day

Video, MBES, CP and

Pipetracker

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ROTV Pipeline Inspection Pedigree

The world leaders in Acoustic Pipeline Inspection

Over 100,000 km of ROTV based Pipeline Inspection during last 20 years

Enhanced Reporting Tools to Deliver Results Fast.

Based around High Frequency Side Scan Sonar

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ROV – The Complete Tool

The diverse payload and intervention capabilities of an ROV make it the

ultimate tool for IRM activities.

Interaction between ROV Pilot and Online Inspection Engineer means that

as specific areas of interest are identified vehicle can slow down and in-

depth investigation undertaken.

This ability along side the flexibility to undertake manual intervention

activities, maintenance, CP stabs etc mean that autonomous platforms can

never replace.

However there is significant scope to reduce the GAP between the “acoustic

inspection” tools and the full capability ROV.

– Optimise ROV time.

– Faster Results.

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Filling the GAP

ROTV

New Payload

AUV

New Generation Vehicle

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The Vessels

Optimum AUV and ROTV Mothership,

The most modern and capable Geophysical Survey Vessels,

Acoustically Quiet, Environmentally Green,

Designed for the Purpose.

Starfix.HP Starfix.G2 POSMV 320 HiPAP 500 EM302 EM710 EA600 SBP300 DP

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The Shallow Water Solution - ROTV

10-200m Water Depth.

Best in Class Side Scan Sonar, Multibeam Echosounder and Inertial

Navigation Solution.

Edgetech 4200HF, Kongsberg EM3002, IXSEA ROVINS

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Adding ROV Capabilities to an ROTV

Improved Navigation - IXSEA ROVINS

– High Quality Attitude Heading Reference System for MBE

– Robust Sub Sea In bottle Inertial Navigation System

– Fully integrated into ROTV

Added Multibeam Echosounder Capability

– EM3002 – Head mounted in “neutrally buoyant” hydrodynamic foam

with carbon fibre outer shell.

– SVS and Survey Depth sensor

– EM2040, Reson, R2SONIC or SAS capable

Upgrades to MacArtney Nexus MK IV Mux

– Dual 1Gbps Ethernet channels

– Plug and Play with a greater range of survey sensors.

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The Deep Water Solution - AUV

10m - 3000m Water Depth

Best in Class Side Scan Sonar, Multibeam Echosounder, Sub Bottom

Profilers, Stills Camera and Inertial Navigation Solution.

Dive duration measured in Days not Hours !!!

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Positioning Solution

Full USBL Aiding INS Solution

– We track the vehicle. We know where it is.

– Most importantly, It knows where it is.

– 1m Accuracy in 1000m WD

Real Time and Post Processed INS Solution

Real Time Examples 1100m Water Depth

4 m altitude camera pass over

grab sample location

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The AUV Inspection Solutions – Side Scan Sonar

Taking the ROTV approach to the 3000m contour

Sophisticated Pipeline Tracking module

USBL seeded navigation solution. No issue if pipeline enters burial and no

pipeline to track. Follow database position

Two day endurance 4-5 knots (350 - 400km production per dive).

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The AUV Inspection Solutions – Multibeam ES

Either based upon sonar pass OR database position

Pipeline Profiling above the pipeline. Trench Profile, Span status and height

AUV dynamically tracking pipeline from a 4m altitude

MBE Coverage of 12m, providing sounding density of 30mm across track

Out of Straightness analysis. INS stabilised.

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The AUV Inspection Solutions – Stills Camera

Based upon real time pipeline tracking with MBES steering AUV

Altitude 4-6m

Stills Images at around 1Hz for full coverage along product

Create Video Slide Show

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Stills Camera – Image Processing Techniques

Images can be rapidly enhanced

using Image Processing

Techniques

Optimised for product and visibility

conditions

Original Invert

Enhance

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High Resolution Images

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AUV Inspection Solutions – Sub Bottom Profiler

Geophysical Tool for profiling the seabed.

Transects over pipeline provide a distinctive hyperbola response from a

pipeline.

From hyperbola depth of burial can be directly measured

Tow fish or Hull mounted sensors historical not very efficient

AUV with rapid manoeuvrability becomes an efficient tool

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Depth of Burial – Coverage Rates

Each Crossing is 25m long line

Objective is 25m interval, Line Turn is 40m curve

Crossing and Line Turn = 65 m @ 4.5 knots

Equates to 128 Crossing Per Hour.

– 3.2km of pipeline per hour

10m crossing Interval. 200 Crossing Per Hour

– 2.0km of pipeline per hour

50m crossing Interval. 80 Crossing Per Hour

– 4.0km of pipeline per hour

MBE data collect across each crossing to provide indication of residual

trench profile

SSS to validate there is no exposure between crossings

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Processing and Reporting

Effectively have three distinct data sets (ROTV, AUV and ROV)

Need a solution that can handle these dataset in both a spatial and

temporal context

Database Driven Solution ( SQL Database)

Facility to IMPORT and EXPORT a multitude of data formats

Support for Video, XTF Sonar and Images

Full customisable Event Codes

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A Universal Pipeline Data Viewer – Starfix.Review

Free utility that is provided to clients with Inspection Report

Provides Survey Data alongside Video, Sonar and Image Data

The Ability for Operator to jump to area of interest. Go to KP xxx

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Event Filtering – Starfix.Review

Tools to enable Integrity Engineer to isolate features of interest

Simple Event Query Builder “Show me SPANS longer the 10m After

KP176”

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Sonar Inspection Data

“Lite” GIS Functions in Plan View ( Load CAD and TIFF Images)

– Side Scan Sonar Mosaic

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Summary

Acoustic Pipeline Inspection complements Visual Inspection (IRM

Campaign)

ROTV ideal shallow water API tool to 200m WD

ROTV offering improved by INS and MBE upgrade

AUV provides a practical tool for API in deep water (3000m WD)

AUV provides a totally new class of pipeline inspection tool

– Engineering Class MBE (Leak Detection)

– High Resolution Stills Camera

– Sub Bottom Profiler ( Depth of Burial)

– High productivity solution (150km + per day)

Integrated Data Processing and Reporting Tools

The Universal Data Viewer

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The New Pipeline Inspection Toolkit

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Thank You