SUBSEA SERVICES

Multi-string conductor cutting

Specialist cutting solutions for the most challenging multi-string well configurations.

01.
What we do

Our operational benefits

Our patent-pending cutting technology combines a unique cutting motion with a precision abrasive waterjet, enabling controlled single-pass cutting through up to four casing strings in the most complex well configurations. Even when annuli are filled with seawater. 

★ PATENT PENDING

Unique cutting head developed and designed by SUBMAR.

★ SINGLE CUT SEQUENCE

Cutting of four strings in one sequence.

No airpockets needed.

 

★ 4-6 HOUR CUTTING TIME

Typical operation time compared to 12-24 hours with conventional methods.

★ REDUCED OFFSHORE COSTS

Less vessel time.
Less offshore exposure.
Lower project costs.


 

02.
HOW WE DO IT

The engineering behind it

Our patent-pending cutting technology combines a unique cutting motion with a precision abrasive waterjet, enabling controlled single-pass cutting through up to four casing strings in the most complex well configurations.

THE CHALLENGE

Jet stability
Conventional cutting methods struggle to maintain a concentrated abrasive waterjet while cutting multiple casing strings.

Controlled erosion
Efficient cutting depends on directing the erosion process precisely through every casing layer.

 

OUR INNOVATION

Patent pending cutting head

SUBMAR has developed and designed a cutting head (patent pending) and tool that combines an innovative cutting motion with precise abrasive waterjet control. This enables controlled cutting through up to four casing strings in a single cutting sequence, even in the most challenging well configurations.

SUBMAR’s technology

How SUBMAR does it

How others do it

Proven under realistic conditions

Extensively tested under representative offshore conditions, including multi-string well configurations and realistic water column simulations, validating cutting performance before field deployment.


 

03.
Where we work

Our worksites

ENGINEERED IN BELGIUM – DEPLOYED WORLDWIDE

SUBSEA & PLATFORM WELLS

Supporting offshore operators and decommissioning contractors with specialist multi-string conductor cutting solutions for subsea and platform wells. Our patent-pending technology enables safe and efficient cutting of the most challenging well configurations.


 

04.
What’s next

Technology developments

Our patent-pending Multi-String Conductor Cutting technology is currently progressing through the final stages of development and qualification. Extensive testing has demonstrated the capability to safely cut through up to four casing strings in a single cutting sequence, paving the way for future offshore deployment.

As field projects become available, this section will showcase real-world applications and project highlights demonstrating the performance of our technology in offshore well decommissioning.

Interested in learning more?

Whether you’re an operator, EPC contractor or decommissioning specialist, we’d be pleased to discuss your project and explore how our patent-pending technology can support your next well decommissioning campaign.

SUBMAR Showcases Innovative Multistring Cutting Technology at SPE Well Decommissioning Conference 2026

On 3 and 4 June 2026, SUBMAR attended the SPE Well Decommissioning Conference at P&J Live in Aberdeen, bringing together leading operators, contractors, service providers, and industry experts from across the well decommissioning sector. The conference provided an...

Multistring Conductor cutting highlighted by CODA

Our Abrasive Waterjet Cutting Technology Featured in CODA’s Decommissioning Innovation & Technology Roadmap We are proud to announce that our innovative abrasive waterjet cutting technology for multistring conductors has been featured by the Centre of...

Abrasive Waterjet Cutting for Multistring Conductors (patent pending)

Abrasive waterjet cutting for MultiString Conductors (patent pending)And we couldn’t be prouder. This achievement is the result of more than eight years of research, development, and rigorous testing. The outcome: a cutting head capable of slicing through the most...

SUBMAR breaking barriers in offshore well decommissioning

Breaking barriers in offshore well decommissioningWhat once took half a day, we now achieve in just 4 hours or less. SUBMAR has reached a true breakthrough in waterjet cutting of multistring conductors — and we can prove it. Backed by rigorous testing, our innovation...

View all projects →

WHY CLIENTS TRUST SUBMAR

Delivering engineered underwater solutions through experience, innovation and uncompromising safety.

 

EXPERIENCED SPECIALISTS


Hands-on experience in subsea projects

 

TAILOR-MADE ENGINEERING


Every challenge is different. We design and engineer customised solutions to meet your project’s specific requirements.

PROVEN TECHNOLOGIES


Industry-leading Hydrodemolition and Abrasive Waterjet Cutting for safe, efficient and precise execution.

SAFETY & RELIABILITY


Certified procedures, highly trained employees and a commitment to delivering quality on every project.

WHY CLIENTS TRUST SUBMAR

Delivering engineered underwater solutions through experience, innovation and uncompromising safety.

 

Experience specialists


 

Tailormade engineering


 

Proven technologies


 

Safety & reliability


 

Contact

Address
Leo Baekelandlaan 1,
B – 8400 Zandvoorde (Oostende)

Contact
info@submar.be
+32 50 65 84 30

VAT
BE 0719 519 571