Unique ESV™ units are purpose-built, self-propelled jack-up/vessel hybrids

Remedial Offshore is building two ESV™ hybrid rig/vessels in China, one each at Raffles Yantai Shipyards and Cosco (Nantong) Shipyards. 

Each ESV™ unit functions like a jack-up rig and a self-propelled vessel. Building on the basic foundation of jack-up drilling rig design, each ESV™ unit is equipped with:

1. Industry-Leading Crane Capacity -- Each vessel carries a FAVCO PC300 pedestal crane mounted on an elevated skidding structure or base. This 280MT main crane, similar to those commonly used aboard tender vessels, facilitates heavy-lift operations when the unit is elevated.
2. Large-capacity Support Cranes-- Each ESV unit also carries two smaller, 50 MT pedestal cranes to handle high-capacity lifts (e.g., heavyweight reels for coiled tubing drilling).
3. More Usable Deck Space-- Our modified design increases available deck space compared to typical jack-up rigs. The main crane is elevated, so its footprint combined with open deck yields 1060 m² (11,400 ft² ) of usable rig-up space. The ESV design also offers 370 m² (4,000 ft²) of below-deck storage space.
4. Large Accommodations -- The two-galleyaccommodation block provides housing for up to 120 persons, with ~80 beds available for operating company representatives and third-party contractors.
5. Self-Propelled (DP-1) -- Unlike jack-up rigs, ESV units are self-propelled. Three azimuthing thrusters facilitate in-field moves without the need for anchor handlers, survey vessels and tug-boat support.
6. Self-Elevating -- Jacking-up on legs provides vertical alignment between the ESV deck and well platform, reducing operational and safety risks associated with crane lifts and well intervention operations. Rated for depths of 100 m/325 ft or more in calm waters (90 m/300 ft in harsh sea states), ESV units are ideal for shallow-water oil & gas fields worldwide.
7. “Doubles” Workover Rig (and top-drive) -- The workover rig package facilitates heavy well intervention and other remedial operations to increase production. The rig can be deployed in lift-off or cantilever mode.
8. Multi-Band Sonar -- Each ESV unit is equipped with multi-band "bottom-mapping" sonar technology.  This allows precision leg placement to avoid pipelines, "can holes" and other subsea hazards while positioning the vessel in close proximity to a well platform.