Standard Passive Heave Compensation

We remove dynamics in order to increase safety and efficiency of marine operations

In general

Standard Passive Heave Compensation units are rugged, easy to implement and very easy to use. It offers excellent performance for topside and subsea applications where the dynamic challenges can be reduced significantly by shock absorption, constant tension or overload protection.

PHC units are hydropneumatic units containing nitrogen gas and oil. These elements give the unit its spring and damping characteristics which are carefully designed to meet our client’s needs for a variety of applications. Standard units normally provide excellent performance for topside and subsea applications where the functionality of shock absorption and/or overload protection is required.

Contact Us
Safelink Standard Passive Heave Compensator

Standard Passive Heave Compensation

Shock absoption

Safe deployment through the splash zone

  • Remove the risk of slack slings and/or snap loads
  • Reduce dynamic load variations

Overload Protection

Overload protection in case estimated  max load is exceeded

  • Extend to compensate if e.g active heave compensation fails
  • Absorbs potentially damaging peak loads

Quick lift-off function

Increase the lift-off velocity on transfer lifts by including a Safelink PHC solution with the functionality of high pressure actuated retraction of the piston rod.

  • Remove the risk of re-entry for offshore cranes with low hoisting speed

Subsea retrieval

  • Extend and retract to compensate for the dynamic load variations caused by topside movement
  • Extend to compensate if pull out forces exceeds estimated values
  • Controlled retraction when the subsea structure is released from the seabed

Strenghts

Excellent performance for topside applications including the Splash Zone
Excellent performance for singular challenge application – the characteristics will be perfectly adjusted prior to the lift
Good performance for subsea retrieval

Limitations

Limited ability to significantly reduce landing velocity during subsea installations
Limited ability to avoid resonance
Limited ability to target both topside and subsea challenges with one unit during the same operation.

Our standard passive heave compensators increase the weather window for your marine operations