High-resolution integrity inspection of a 24-year-old water injection pipeline

15-11-2018
Accurate wall thickness measurements through coating and internal scale deposits
artemis video screenshot1

Challenge


A major North Sea operator required accurate, high-resolution wall-thickness data to determine the integrity of a 24-year-old water injection pipeline. The measurements would enable the operator to assess corrosion growth to inform a risk-based inspection strategy. However, there were several barriers to conventional inspection techniques. The pipeline, was 20mm thick making electromagnetic methods challenging. 

To remove the three-layers of various thicknesses of polypropylene and polyethylene coating which would have been necessary for conventional ultrasonic testing would have been prohibitively expensive. There were also scale deposits of various thicknesses and compositions which would have required extensive cleaning runs to remove them and enable a conventional, ultrasonic-testing pigging inspection.
 

Solution


Halfwave’s ARTEMIS inspection tool integrates with a remotely operated vehicle and provides 360° wall-thickness data for areas of interest which have been identified from existing pigging data. Unlike conventional methods ARTEMIS can provide accurate and high-resolution data and record the wall thickness regardless of its type or the thickness of coating or scale.

The operator wanted to ensure that Halfwave’s ARTEMIS was able to deliver the promised performance and a test was conducted on a sample pipe with axial grooving and pit defects. ARTEMIS passed with flying colours detecting the location and magnitude of all the defects with high accuracy and repeatability and without any loss of accuracy through the external coating.
 

Result


The tool was deployed by the operator and collected accurate, high-resolution data quickly and efficiently. It integrated smoothly with the remotely operated vehicle system. There was no operational downtime, and the work was completed on schedule and within the budget.

The wall thickness measurements have enabled reliable assessments of corrosion growth, which are informing a risk-based inspection strategy that will help the operator to ensure the integrity of its asset.

View the ARTEMIS technology video below.

scan subsea
 

Halfwave AS

(897 067 382)

Bergen Workshop and Office
Glasskaret 1
5106 Øvre Ervik
Hordaland, Norway

mail@halfwave.com
Phone: +47 47 66 68 00
Oslo Office
O.H Bangsvei 70
1363 Høvik
Oslo, Norway

Halfwave LLC

(82-3961362)

US Workshop and Office
6329 Guhn Road,
Houston TX
77040 USA
Tel +1 281 595 8208
Copyright © 2018 Halfwave AS. All rights reserved. This web site, and the information which it contains, is the property of Halfwave and its affiliates and licensors, and is protected from unauthorized copying and dissemination by Norwegian copyright law, trademark law, international conventions and other intellectual property laws. Except as permitted by the applicable copyright law, you may not reproduce or communicate any of the content on this website, including files downloadable from this website without the prior written permission from Halfwave. Halfwave is a trademark or a registered trademark of Halfwave AS in the Kingdom of Norway and certain other countries. All Halfwave product names and logos are trademarks or registered trademarks of Halfwave

Halfwave

(897 067 382)

Bergen Workshop and Office
Glasskaret 1
5106 Øvre Ervik
Hordaland, Norway

mail@halfwave.com
Phone: +47 47 66 68 00
OSLO OFFICE
O.H BANGSVEI 70
1363 HØVIK
OSLO, NORWAY

Halfwave LLC

(82-3961362)

US Workshop and Office
6329 Guhn Road,
Houston TX
77040 USA
Tel +1 281 595 8208
Copyright © 2018 Halfwave AS. All rights reserved. This web site, and the information which it contains, is the property of Halfwave and its affiliates and licensors, and is protected from unauthorized copying and dissemination by Norwegian copyright law, trademark law, international conventions and other intellectual property laws. Except as permitted by the applicable copyright law, you may not reproduce or communicate any of the content on this website, including files downloadable from this website without the prior written permission from Halfwave. Halfwave is a trademark or a registered trademark of Halfwave AS in the Kingdom of Norway and certain other countries. All Halfwave product names and logos are trademarks or registered trademarks of Halfwave