CRAWLER

Diamond Wire Cutter

Available tool for the Crawler

The Diamond Wire Cutter is designed to cut and remove tubulars. It is well suited for
decommissioning jobs as well as the removal of tubular such as caissons, risers etc.
Removal is done safely and controlled; one section at a time.

This Diamond Wire Cutter can be used to remove surplus structures on tubulars.
Further, it will remove appendices from the tubular at a fixed distance leaving a minimal
drag profile and thereby limiting the forces on the structure.

The Robotic Crawler is able to handle the pipe after cutting and bring the pipe to a secure
position on the platform. 

The Vertical Diamond Wire Cutter; from the trials prior to going offshore

The Spider Deck Clean-Up Campaign for Tyra Development

SubC initiated the campaign at Tyra the 18th July 2018, and the last cut was performed
the 18th July 2019 - precisely 1 year later.

The past year the Robotic Crawler has completed 124 complicated cuts in the splash zone:

• 82 vertical cuts on Tyra East (B, C, and E) and Tyra West (B and C)
• 28 circumferential cuts on Tyra East (B and C)
• 14 angle iron cuts on Tyra East C

And not least, we recorded 0 incidents in the harsh environment.

As the Robotic Crawler is based on a topside operated access solution, all 124 cuts were
performed without personnel in the splash zone. 

Read much more about the Spider Deck Clean-Up Campaign for Tyra Redevelopment

Diamond Wire Cutter Light

Available tool for the Crawler

The Diamond Wire Cutter Light is designed to remove surplus steel structures to ensure enough
space for the Crawler to operate. It is lowered from the topside to the splash zone where it grabs,
cuts and removes the steel structure. The removal is done safely and controlled. 

This light version of the Diamond Wire Cutter is often used in combination with our Grabber.

The Grabber is able to handle the structure after cutting and bring it to a secure position on the platform. 

Ultrasonic Thickness Measurement

Available tool for the Crawler

The Ultrasonic Measurement tool will, in combination with the Robotic Crawler, create a
mesh of measurements that allows for structural integrity engineers to assess the actual
strain on old as well as new installations.

The Ultrasonic Measurement tool will effectively clean and prepare the surface before probing.
Mesh size resolution can be varied. Measurements can be done both above and below surface
level as well as in the splash zone.

Thickness measurement video with Total

Close Visual Inspection

Available tool for the Crawler

The Close Visual tool allows for very high-resolution images of specific areas that might be of concern. The tool will clean, light up, and photograph areas of very high resolution. Further, it stores all data with information about location and time for later review.

The tool allows for documentation and review of very small defects and anomalies.

The Crawler video by Total

Abrasive Water Cutting

A new, innovative way of using the Crawler. 

For cut execution, the crawlers will be fitted with Abrasive Water Cutting Nozzles, which will
penetrate the tubular using a mixture of sand and water jetting at ultra-high pressures.
Ultrasonic measurements will verify the completeness of the cuts.

This method improves safety and efficiency since

• the cutting sequence is done without using divers as the operations is controlled from a control container
• an ROV can relocate the crawler within the jacket structure to cut at various locations
• you avoid the risk of a wire being stuck under the weight of a platform while cutting

Read the full case