Device for handling hoses of a working well for a drilling rig

A manipulator device arranged to move a hose manifold as one or more hoses is/are being connected to and disconnected from pipelines arranged on a marine riser, the manipulator being fixed to an undercarriage which is movable relative to a working well, wherein the undercarriage is a carriage arranged on a deck bordering on the working well, and wherein the manipulator has three translatory degrees of freedom, first and second degrees of freedom being assigned to a manipulator arm and a third degree of freedom being assigned to the undercarriage by horizontal displacement of the undercarriage.