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
- Expro's modular/flexible subsea system allowed use of a rig of convenience
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 subsea.enquiries@expro.com.
