ELSA-HD System
ELSA® HD (Expro landing string assemblies) are engineered for reliability in the most challenging subsea environments. Designed to withstand highly erosive solids and deepwater conditions, they provide dependable solutions for horizontal and vertical subsea xmas tree well completions and interventions.
High-Reliability Landing String Assemblies
The ELSA® HD includes a full suite of valve assemblies, lubricator valve, retainer valve, and subsea test tree, delivering critical well intervention, pressure control, and disconnection functions during completion, workover, or intervention operations in harsh environments.
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
