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Subsea Engineer | Subsea Structures Installation & Commissioning | Subsea Fields IMR | Subsea Projects & Operations Interface | SPS FAT, SRT & SIT | Subsea Toolings | Subsea Fields Development

Heave-Compensated Landing System The heave-compensated landing system (HCLS) used by Delmar consists of the following equipment: a compensating buoy system, compensating belly chain, and pendant wire. Figure below shows an example of the HCLS installation of subsea structure with an anchor handling vessel (AHV) The buoyancy system suspends the subsea structure, keeping the system close to a neutrally buoyant condition in the vertical direction. The subsea contracture is lowered to the seafloor in a controlled manner by paying out wire from the AHV, which transfers more chain and thus more weight to the buoyancy system. As more chain is added, the added weight overrides the buoyant forces, causing the subsea structure to slowly sink. The length and configuration of the chain are the compensating portion of the system. HCLS has a very good heave compensation effect, but it is difficult and complicated to get the subsea equipment overboard from the barge. #subsea #offshore #saipem #subsea7

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