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Oil rig underwater welding
In this article, you will learn more about oil rig underwater welding. At Odin Diving, we are experts in repairing and maintaining rigs under extreme conditions.
What is oil rig underwater welding?
Offshore structures such as oil rigs are exposed to constant wear from saltwater, strong currents, and extreme weather conditions, leading to potential structural damage. Underwater welding is essential for maintaining these structures, preventing corrosion-related failures and ensuring operational reliability.
At Odin Diving, we have the expertise to handle welding tasks in challenging offshore conditions. In these environments, having the right equipment, specialized knowledge, and precise techniques is crucial to delivering safe and durable results.
In the harsh marine environment, regular maintenance is important for minimizing structural degradation. We help extend their lifespan, reduce downtime, and prevent costly repairs.
Class-approved welding
At Odin Diving A/S, we use a variety of oil rig underwater welding methods, depending on the specific requirements of the task, the depth, and the environmental conditions.
Wet welding:
This method is performed directly in the water using specialized waterproof electrodes. Wet welding is often chosen for quick repairs, as it allows divers to weld without the need for a sealed chamber. It is a cost-effective solution that provides fast and accessible maintenance.
Some of the techniques employed in wet welding include:
- Shielded Metal Arc Welding (SMAW)
- Flux-cored Arc Welding (FCAW)
- Friction Welding (FW)
Dry (hyperbaric) welding:
Hyperbaric welding takes place inside a sealed, pressurized chamber that creates a dry environment around the welding area. This method is preferred for critical structural repairs, as it provides higher welder quality and greater durability. Some of the most technologically challenging tasks at greater depths require hyperbaric welding. These include, for example:
- Repair and maintenance of pipelines
- Repair of damaged structures
- Maintenance and repairs of various components
The quality of our welding work is always a top priority at Odin Diving A/S. We always perform class-approved welding. This means that our work always complies with strict international standards set by, for example, DNV, ABS, and Lloyd’s Register. Our professional divers and welders are all certified according to these standards, ensuring that our welding meets the highest requirements for safety and durability.
Professional team of divers
At Odin Diving A/S, we have been providing professional underwater repair and maintenance since 2008. Our team consists of highly trained and experienced divers, dedicated to delivering top-quality solutions in the most challenging offshore environments.
We are ISO 9001:2015 certified, ensuring that our management system is built to train, maintain, and attract expert personnel of the highest caliber.
We invest in our divers’ expertise through specialized courses in underwater repair, equipping them with the skills needed to handle ship and rig repairs with precision and efficiency. Our passion for the sea is matched by our commitment to providing our divers with the best tools and training for underwater inspection, repair, and maintenance.
Contact information
Many offshore rigs require regular maintenance and repairs to remain operational. At Odin Diving A/S, we specialize in offshore underwater repairs and rig maintenance, including oil rig underwater welding.
Our expertise covers inspections, maintenance, repairs, minor constructions, and decommissioning, all performed with precision, safety, and efficiency.
If you need professional underwater services, don’t hesitate to contact us today:
- Telephone: (+45) 98 15 30 30
- Email: INFO@ODINDIVING.DK
Our main services
Discover the core services we offer to support the maritime and offshore industries. From inspections to repairs, our experienced team ensures your ships and rigs remain safe, efficient, and operational.

Inspection
Comprehensive inspections for ships and rigs, including IWS, UWILDs, and structural surveys.

Maintenance
Hull cleaning, propeller polishing, and corrosion prevention to optimise performance.

Underwater Repair
Reliable underwater welding and repairs for ships and rigs to minimize downtime.

Non-destructive testing
Certified personnel at levels 1 and 2 for planning, execution, and documentation of NDT.

Class approved welding
We have approved welding procedures for fillet weldings in all positions.
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Oil rig underwater welding
Diving Certificates
Non-destructive testing (NDT)
Rig maintenance & repair
Contact Odin Diving A/S
Reach out to us for inquiries, project collaborations, or to learn more about how our expertise can support your operations.
Send us an email with your questions or project details, and we’ll get back to you promptly.
PIER 6-4, 9900 Frederikshavn
Visit us at our headquarters or find us at the dock in Frederikshavn.