With increased production of hydrocarbons delivered through subsea wells, more demand is placed on bringing new technologies to the market that can ensure the safe development and intervention of these wells, located in thousands of meters of water.
When planning to complete any type of subsea well intervention to improve production, repair and remediate, or carry out abandonment activities, it is crucial that the appropriate well access system is identified based on capability and efficiency, while ensuring safety is paramount.
Expro provide a complete planning and delivery package across the lifecycle of the well, for in-riser and open water operations, that allows operators to maximise the value of their assets through three established methods for subsea well access:
Subsea Test Tree Assembly (SSTTA)
The Subsea Test Tree Assembly minimises risk in subsea completion, intervention workover and exploration and appraisal operations for new and existing wells by providing the capability to control tubing pressure with dual barrier isolation. Deployed with a rig marine riser and safety system, it can rapidly shut-in and disconnect safely achieving secure well status in any event.
Intervention Riser System (IRS)
For improved production or abandonment activities, the subsea Intervention Riser System will safely establish and maintain well access throughout operations. The package provides a dual barrier through tubing well access system with coil tubing cutting and disconnect capability which is deployed quickly through water with tubing from a rig or vessel.
Riserless Well Intervention System (RWIS)
Deployed through water from a dynamically positioned monohull vessel, the Riserless Well Intervention System provides a reliable wire through water solution for carrying out cost effective intervention and abandonment operations on all types of subsea wells.