Customer challenges
- Expro’s client had the requirement for a subsea safety system to provide well barriers and disconnect capability during a subsea well abandonment campaign in the UK North Sea
- This abandonment campaign was to be carried out by a mobile offshore drilling unit already contracted to client
- Our client required three different designs of Tubing Hanger Running Tools (THRT) across the campaign. Two of these designs being mechanical so it required detailed planning on the string rotation/SSTTA umbilical management
Expro Excellence
- Expro supported our client with the provision of a primary and back SSTTA system along with landing string tubulars and a Surface Tree
- Three different types of interface adaptors were designed, manufactured, and certified by Expro to ensure full capability across all THRT designs
- Previous operational experience working on assigned MODU proved invaluable throughout the planning and execution of this project
- Our equipment was In-hole for 720 hours with zero NPT attributed to Expro equipment or personnel across the campaign
- Expro SSTTA reliability was demonstrated with the system being unlatched and successfully reconnected twice during the campaign
- Excellent onshore support ensuring delivery of equipment and personnel was managed to an extremely high standard through the entire campaign
Value to client
- Expro’s expertise ensured all THRT’s were seamlessly interfaced with and safely changed out between wells across the campaign, ensuring no downtime, safety or environmental issues encountered
- Un-interrupted operations in the face of everchanging operational challenges
- Landing string disconnected and re-connected on two occasions at SSTTA, ensuring safe and efficient operations
