Bespoke subsea system for BP's Quad 204 development

Subsea Well Access

Bespoke subsea system for BP’s Quad 204 development

Customer challenges

To deliver a suitable landing string for BP's Quad 204 development in the North Sea
This was a technically challenging scope of work due to the rig BOP configuration/orientation as well unique completion/installation methods and bespoke SPS interface- this was to suit BP's rig of convenience which was a new semi-submersible was being used that had been optimised for drilling operations and harsh environments
A dual bore vertical xmas tree (VXT) solution was selected by BP

Expro Excellence

Expro's long -standing relationship and track record using similar technology, allowed the Subsea team to use previous experience and lessons learnt to ensure complete compliance with the customer's expectations for the project
Engineering work was undertaken to provide a landing string that fitted the BOP without compromising our customer's specific project requirements, nor reducing the landing string functionality
Re-engineering work resulted in the creation of a combined Integral Slick Joint (ISJ) and Tubing Hanger Running Tool Adapter (THRTA), reducing the overall landing string assembly length so to accommodate the rig BOP dimensions and configuration
Production and annulus access requirements, along with full helix orientation, BOP and SPS interface challenges highlighted the unique features within Expro's bespoke landing string
Engineering analysis for FMECAs, stress analysis and multiple GRAs to account for various scenarios were undertaken

Value to client

Cost efficiencies due to a reduction in equipment complexity:

Monobore landing String
Integral Slick Joint
No requirement for dual bore riser due to Expro's technical solution, single completion string deployment, full well control inclusive with THOJ/orientation helix arrangement
Accelerated timeline achieved within nine months, in line with rig delivery

Expro added value with a dual bore VXT configuration that allowed:
Orientation helix of BOP alignment included in the system (full well control and disconnect features were not compromised)
Deployment with monobore tubing, eliminating the need for a dual bore riser
Primary barriers allowing well flow clean-ups prior to the installation of the dual bore xmas tree
Provision of dual bore access for manuipulation of the annulus and mechancial access for intervention

Customer challenges

To deliver a suitable landing string for BP's Quad 204 development in the North Sea
This was a technically challenging scope of work due to the rig BOP configuration/orientation as well unique completion/installation methods and bespoke SPS interface- this was to suit BP's rig of convenience which was a new semi-submersible was being used that had been optimised for drilling operations and harsh environments
A dual bore vertical xmas tree (VXT) solution was selected by BP

Expro Excellence

Expro's long -standing relationship and track record using similar technology, allowed the Subsea team to use previous experience and lessons learnt to ensure complete compliance with the customer's expectations for the project
Engineering work was undertaken to provide a landing string that fitted the BOP without compromising our customer's specific project requirements, nor reducing the landing string functionality
Re-engineering work resulted in the creation of a combined Integral Slick Joint (ISJ) and Tubing Hanger Running Tool Adapter (THRTA), reducing the overall landing string assembly length so to accommodate the rig BOP dimensions and configuration
Production and annulus access requirements, along with full helix orientation, BOP and SPS interface challenges highlighted the unique features within Expro's bespoke landing string
Engineering analysis for FMECAs, stress analysis and multiple GRAs to account for various scenarios were undertaken

Value to client

Cost efficiencies due to a reduction in equipment complexity:

Monobore landing String
Integral Slick Joint
No requirement for dual bore riser due to Expro's technical solution, single completion string deployment, full well control inclusive with THOJ/orientation helix arrangement
Accelerated timeline achieved within nine months, in line with rig delivery

Expro added value with a dual bore VXT configuration that allowed:
Orientation helix of BOP alignment included in the system (full well control and disconnect features were not compromised)
Deployment with monobore tubing, eliminating the need for a dual bore riser
Primary barriers allowing well flow clean-ups prior to the installation of the dual bore xmas tree
Provision of dual bore access for manuipulation of the annulus and mechancial access for intervention

Contact

For further information, please contact: