Device and method for installing and handling a module of a subsea treatment station

A device for installing and handling a module of a subsea processing station, comprising a frame intended to be fixed to a module, and a hydraulic system intended to ensure a shock-absorption and a controlled-lowering of the module on the base of the station, the hydraulic system comprising a plurality of hydraulic cylinders each intended to be connected to a foot able to come into contact with a base of the subsea processing station, each hydraulic cylinder comprising:

• a cylinder body secured to the frame;
• and
• a piston intended to be put into contact with a foot and movable in translation inside the cylinder body between a first mechanical abutment corresponding to a deployed position of the piston and a second mechanical abutment corresponding to a retracted position of the piston, the piston dividing the internal volume of the cylinder body into a first chamber and a second chamber which are sealed relative to each other;
• the first chamber of each hydraulic cylinder being supplied with hydraulic fluid by two independent hydraulic circuits comprising a shock-absorbing circuit able to move the piston between its deployed position and an intermediate position located between the deployed position and the retracted position and defined by a hydraulic abutment, and a controlled-lowering circuit able to move the piston between the intermediate position and its retracted position.