If you require high accurate measurements under water we have the solution for you.
Our system adds high accuracy, reliability, ease of use, and cost efficiency to your offshore operations. And it reduced HSE hazards by reducing the number of personnel required offshore.
Close-range photogrammetry is an ingenious technique for retrieving spatial data such as the size and position of objects from two-dimensional images. Using specialized software, the images are processed into a 3D model. From this model, information such as dimensions, angles, and surfaces can be extracted.
The technique is very accurate, delivering results correctly to within 1/20,000 of the object size; that is, an object 100 meters long can be measured with an accuracy of ± 5 millimeters (field proven).
Since the year 2000, we have developed a Single Camera System (SCS) for the oil and gas industry and have been involved in more than 500 metrologies.
The SCS has some issues that we have addressed with our new Multi Camera System (MCS) development.
We define multicamera systems as systems using three or more cameras installed in the same housing. We consider two camera systems as stereo systems. Recording using three or more cameras at the same time will enable better control with regard to accuracy and precision.
For each point surveyed on an object:
- Two cameras give one possible intersection.
- Three cameras give three possible intersections.
- Four cameras give six possible intersections.
The more intersections to the surveyed points on the object, the better the chances are for an accurate and precise position of the point relative to the other points within one single recording. Given that the system is correctly calibrated.
Multi Camera System
Reliable and Accurate results every time
Using our multi-camera system, you can have a 3D model within a few seconds after recording.
- 3D model for every recording
- Several recordings can be combined for larger areas
- System and survey objects can move during recording. I.e. for chain survey and structure installation
- Less or no marking of the surveyed object
- Reliable
- High accuracy
- Area coverage
Examples of information that can be extracted
- distances
- angles
- area
- volume
- tracking moving objects like subsea structures under installations
- wear and tear like anchor chains
- pipeline and flange details
- and more
Some milestones
Single camera system
2000
We introduced Close Range Photogrammetry as a tool within Oil&Gas using single camera system.
2000
Our first project.
Vertical anchor support, 1 by 2 meters.
Position of 10 boltholes.
Accuracy +/-0.25mm
2006
Jacket installation in Baku.
70 by 90 meters between piles. Including diagonal and template areas. Surveyed length is 450 meters.
Required pile distance accuracy +/-50mm
Achieved accuracy: +/- 10mm
2007
Spool metrology.
Over 80 spools have been surveyed since 2007.
Up to 90 meters in length.
Accuracy between 1 in 5 000 and 1 in 20 000.
2013
Jacket modification.
Accuracy 1 to 10 000
Over 20 000 images acquired.
Multi camera system
The multicamera camera system development was started in 2016.
2016
Our Multi-camera system is proven to deliver accuracy and reliability.
Measurements can be performed while the system and objects are moving.
One example of moving objects is fish. Anchor chain and module installation are other.
2020
Object recognition and tracking.
Track objects in real time.
As seen here, tracking fisk. Or for instance tracking sections during installation offshore.
2022
experience using the single camera system
In the Year 2000, we did our first underwater metrology. The accuracy requirement was +/- 0.2-millimeter. Within an area of 1 by 2 meters. It was a success.
Since then we have participated in over 150 projects consisting of more than 500 metrologies.
We have optimized the process to reduce cost, preparation and offshore time, in addition to processing and reporting time.
Accuracy, on the other hand, has increased. When we started the accuracy was 1mm in 5 000mm. Now we can achieve 1mm in 20 000mm or better.
Our first project
The year 2000
Norway
Client: Stolt Offshore now Acergy
End user: Statoil, now Equinor
Our first job was to acquire the position of 10 boltholes on vertical anchor support. The 10 bolt holes had to be positioned within +/- 0.25 mm accuracy relative to the given theoretical position.
This was a challenge that our client could not solve using the tools available at the time.
We solved it.
And the riser was installed successfully.
Largest in length
The year 2006
Azerbaijan
Client: Fugro Survey Ltd Caspian
End user: BP
This is our largest project in terms of distance surveyed.
The jacket has buckets at each corner that shall fit in piles when it is installed on the seafloor.
The distance between the piles was 70 by 90 meters. Accuracy required +/- 50mm
We solved it.
And the jacket was installed successfully.
Largest number images
The year 2013
Denmark
Client: Boskalis
End user: Maersk Oil & Gas
This is our largest project in terms of images acquired.
The jacket was to undertake a major update. 16 nodes should be reinforced using steel clamps and the conductor area reconstructed.
We solved it.
And all elements were installed successfully .
Click on section for Boskalis report