ELSA-HD System

Applications

• Completion installation, workover, and intervention operations on horizontal and vertical subsea xmas trees from MODUs in water depths up to 10,000 ft (3048 m)
• Drill stem testing, well clean-up, and extended appraisal operations requiring a large flow bore
• Specifically designed for environments with high levels of entrained solids and aggressive media (e.g. reservoir fracturing)
• Batch completion campaigns where minimal redress operations between runs are critical

Benefits

• Provides a dual primary subsea barrier between well and surface during subsea operations
• Enables controlled well operations without requiring BOP function
• Disconnect function allows MODU to unlatch/re-latch safely in adverse conditions
• Mechanical features permit hydraulic fracturing and erosive solids backflow without compromising safety
• High reliability and low maintenance requirements, virtually eliminating rig downtime
• High-integrity ball valve construction protects seal surfaces from debris damage
• Electrical feed-through and wet connectors to facilitate surface readout
• Compatible with EXPRESS subsea control systems or direct hydraulic operation
• Chemical injection capability into production bore
• Pump-through functionality for well equalisation or bull heading

Available configurations include:

• 7 3/8 ELSA® HD 
• 6 ¾ ELSA® HD 
• 6 1/8 ELSA® HD