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www.woodgroupodl.com
Dimensional Control Survey Team
“Zero Failures to Fit”
Presented by
Stewart Buchanan Global Head of Sales & Marketing

2 www.woodgroupodl.com
 Dimensional control surveying is the technique and science whereby 3-dimensional spaces are
accurately measured to determine the area between points, creating digitally mapped distances
and angles.
 Dimensional control can be defined as the process of acquiring extremely accurate dimensional
documentation that is spatially referenced to a known or established benchmark. Using the
latest survey technology, Surveyors can measure and produce 3d Cad models from single pipe
spool replacements to full FPSO/Jacket construction surveys.
 The captured data can be transformed to a clients preferred format, offering quick and easy
data evaluation and problem checking. As we offer a full draughting service, we can provide full
3D models using Micro-station, 2D drawings or Point Cloud data from our Laser Scanners.
What are Dimensional Control Surveys?

 Your Challenges- Lack of knowledge of installation, clear visibility, little or no accurate data
 The Benefits - Preventing failures to fit, clash free installations, client owned reusable data,
asset integrity, familiarisation, HSE, accurate repairs, upgrades and maintenance etc.
 Reduce Costs – cost effective, multi use data, such as construction planning, reduce “hot-
work”, increase in safety, reduce on site material handling, “Zero failures to fit”. Reduce the
number of offshore visits
 Dimensional Control can meet these challenges and help ensure "clash-free" design and
installation of projects involving piping, structural and equipment that must integrate and “fit first
time”.
 Fabric & Maintenance, HSE, Familiarisation & Induction, Training, Emergency Response
Why use Dimensional Control Surveys?

Who are we?
• Global Leaders in Dimensional Control
• Providing High-Quality, Cutting Edge Surveys to Suit Every Client's Unique
Requirements
• Zero Failures to Fit

Introduction
 Wood Group ODL Dimensional Control Surveys provide cost effective dimensional control
services to the Oil & Gas Industry:
 A Global team of experienced surveyors – using proven technology
 Considerable experience of surveying offshore platforms and onshore installations for the oil
and gas industry
 Precision survey data to fabricate items that fit when installed, without clashes

Why are we the best choice?
• Access to surveyors by BG project teams
• Ease of sharing data
• Communication and responsiveness
• Leading technologies on the market
• Highly qualified team of surveyors
• Output customized to customer needs

How do we capture the data?
Laser scanner – uses
controlled steering of laser
beams followed by a
distance measurement at
every pointing direction, to
capture the shape of
objects, buildings and
landscapes. Captures large
amount of spatial data in
short period of time.
Total station – a theodolite
integrated with an
electronic distance meter to
read distances from the
instrument to a particular
point with the highest
accuracy. Used for small,
high accuracy tasks (e.g.
tie point surveys)
Camera with a fisheye lens
on a panoramic bracket –
used to capture a complete
panoramic view from each
scan position. The image
can be integrated with laser
scans. Used to produce
highest quality Truviews.

What do we offer?
• Clear, high-resolution pictures of as-built
installations
• Accurate measurements to plan and design tie-
ins
• Visualization of potential clashes
• Re-usable surveys
• Flexibility to change scope
• Truview panoramas, available for everyone as
freeware
• Integration with PDMS, AutoCAD, Microstation
and Navisworks

Complete installations surveys
A laser scanner can produce 3D point cloud models that can be used for multiple purposes:
• New design planning
• Clash detection
• Tie point information
• Decommissioning

Whole-life Asset Support
Government Negotiations Seismic Assessment Exploration / Appraisal Drilling Development Project Operation (Production) Downstream Decommissioning Relinquish License
LogisticsProduction FacilitiesDrillingWells / Drilling ManagementReservoir and Production
Development Project Operations Maintenance Modifications Downstream Decommissioning
Operating Profit
Development Costs
Brownfield Activity
Wood Group PSN Core Services
Supporting your asset throughout its life – from fabrication to decommissioning

Our Services include
Laser
scanning
Total
Station
surveys
Redline mark-ups of
isometric drawings
Plant Design Management System
(PDMS) compatible coloured point
clouds
TruViews
(freeware that enables 3D
colour images to be viewed
and shared over the
internet)
Clash
checking
CAD
Modelling
Navisworks ready
data

Why Wood Group ODL?
The Wood Group ODL approach adds value to our clients:
• Experienced and Competent team (Fully qualified surveyors,
whether single or two man projects)
• Good Track Record/Customer Satisfaction
• Growing team to meet client needs, increase availability and
reduce response time
• Internal structured training and development programme
• Continual upgrade of software and techniques
• Wide range of tailored survey types
• (from total station measurement of single spools to full colour laser scans)
• Multitude of Applications
• (walk through, design, asset integrity, site training, briefings before mobilisation etc.)
• Dual benefit - Photos taken when scanning can also be used to
produce high-resolution 360 degree panoramas, adding value
and eliminating duplication of efforts, and the use of two
providers!
• Level of Design Accuracy (1-2mm)
• No failure to fit
• Competitive pricing

Innovation and Development of New Services
• Close links with industry:
• Test latest technology
• Only adopt if it provides additional benefits
• Manage scan data from all sources
• Enable project team, ops, construction etc to
have access to most recent scan data
• Asset management
• Use scan data as portal for:
• Maintenance information
• Asset integrity
• Web-based to allow widespread access
• Condition monitoring
• Respond to customer requirements

Laser Scanning and It’s Benefits
• Scanning is used to measure surfaces and record spatial relationships
• Requires line of sight, but you can perform and combine multiple scans to record subjects
more fully
• Laser Scanners create three dimensional point clouds representing an object’s surface,
automatically, systematically and at high speed

• 3D measurements of distances and volumes
• Clash detection
• Design visualisations
Manipulation of the Point Cloud

What level of detail can we capture? What accuracy?

How do we do that?

Design visualization

Project example: Lifeboats Replacement
• Client looking to procure new, larger lifeboats
• Davits surveyed offshore
• Lifeboat surveyed onshore
• Survey data overlaid and checked for clashes
• Proposed lifeboat is too large – client now able to look
for an alternative solution

Repair Order – Red line Mark ups/New Isometrics

SULLOM VOE MEOR HS2 MODS PROJECT
Topographical Surveys

Truview Example

Truview: access to scans for everyone
Truview is a panoramic view of the scene, which can be used by anyone who has Internet
Explorer. A plugin which enables this functionality is available for free. No extra software or training
is required in order to view the data.

Truview: access to scans for everyone
The image is enhanced so that basic measurements can be taken directly on the screen:

How do we work?
The scheme below shows the usual workflow of a typical project:
Survey
request
from Client
Surveyor
allocated to
job
Surveyor
discusses
requirement
s with Client
Finalise scope
of work,
survey method
and
deliverables
Prepare kit
for air freight
or despatch
by boat
Mobilise.
Complete site
inductions and
obtain permit
to work
Perform the
survey
Return to
office,
process data
Final scans,
models and
drawings
delivered to
Client

Contacts
Stewart Buchanan: Wood Group ODL
+44 07738 405529
stewart.buchanan@woodgroup.com

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Wood Group ODL Dimensional Control

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