A leading North Sea operator engaged James Fisher to support the severance and proof pulling of several platform and subsea multi-string wells during 2025. 

Customer challenge 

The customer required reliable, highly-experienced support to decommission 13 wells across three platform-based campaigns and two subsea wells. 

With each well presenting challenges due to age and condition, a comprehensive tooling spread operated by a technical team with experience of these well types was required to overcome both environmental and technical challenges. 

Solution for our customer 

James Fisher's decommissioning specialists designed, built and tested in-house a bespoke proving string for this project. This provided certainty on cut completion prior to mobilising section recovery tooling spread and personnel. 

Multi-string cuts performed on  9-5/8in, 13-3/8in, 20in and 30in arrangements were successfully carried out, achieving an optimal result due to effective methodology and efficient execution. 

Customer impact 

• Enabled safe and efficient severance and proof pulling of conductors from multiple wells
• Adapted decommissioning approach to overcome well condition limitations 
• Deployed bespoke and off the shelf decommissioning solutions to meet customer requirements, including Twin Abrasive Mixing Unit, DCH2 Internal Cutting Tool and a bespoke proving string assembly
• Supported customer to deliver against asset obligations and environmental responsibilities.