HOUSTON -- OceanWorks International has successfully designed, built, and delivered the first of five passive heave compensation systems for an operator in the Gulf of Mexico.
The unit mitigates the vessel's oscillatory motion induced load on the tether management system during submerged operations in high sea states. This first unit has a safe working load capacity of up to 43,000 lbs (21.5 tons).
The heave compensator pays out or pays in the umbilical cable without active controls in a range of ± 9 ft (2.7 m).
For ease of transportation, it is designed to fit in a 20-ft (6-m) open top container, and is fitted with four lift points (DNV lift certificate). The unit's flexibility allows for customized sheaves to cover various sizes of umbilical.
The design allows for options including remote panel location, stainless steel tubing for better corrosion resistance, and customization for larger or smaller applications, according to OceanWorks.