At the frontiers of subsea survey technology

The company has designed a next generation auto-drop piston corer which is expected to dramatically reduce the amount of time needed for subsea geotechnical surveying, increasing safety and efficiency, whilst also reducing costs.

“The new auto-drop piston corer technology represents a step change in precision and efficiency,” said Rob Ferris, managing director of Feritech Global.

”We estimate that this new product will enable seabed samples to be collected up to ten times faster than with traditional piston corers.”

Bespoke system

A piston corer is a long, heavy tube plunged into the seafloor to extract samples of soft sediment.

Analysis of these samples provides vital information for developers who want to build installations out at sea, such as wind turbines, oil and gas pipelines, or undersea cables.

The new bespoke system has been developed for Oceaneering with their project team involved in its development, providing feedback at each stage.

Using sophisticated software, the auto-drop piston corer can be programmed, lowered to pre-set sea depth and then automatically released. This provides much greater precision and faster speeds than traditional piston corers, which are launched manually by a trigger mechanism. 

In addition, the Launch and Recovery System (LARS) and the winch can be operated remotely, through a control panel which is integrated into a lightweight wearable pack.

As a result, piston corer operations can be carried out safely by only one person, whereas previously at least two staff would have been needed to operate all the equipment required.

The upgraded LARS system also includes a new, strengthened barrier rail, which can withstand pressures of up to 2 tonnes.