Method and device for continuously laying and burying a flexible submarine conduit

Method for continuously laying and burying an underwater flexible conduit, the flexible conduit being stored on at least one reel, said method comprising the steps of:

• using a self-propelled sea plough remote-controlled via an umbilical cable, said sea plough carrying said at least one reel of flexible conduit,
• controlling said sea plough carrying said reel from a site so as to lay and bury a length of the flexible conduit up to a first predetermined point,
• controlling said sea plough beyond said first predetermined point from another site,
• continuing laying and burying of the flexible conduit as far as a second predetermined point, one of said sites being the land and the other comprising a waterborne vessel, and
• using two separate control units, one on the land and the other on the waterborne vessel.

Method for continuously laying and burying an underwater flexible conduit, the flexible conduit being stored on at least one reel, said method comprising the steps of:

• using a self-propelled sea plough remote-controlled via an umbilical cable, said sea plough carrying said at least one reel of flexible conduit,
• controlling said sea plough carrying said reel from a site so as to lay and bury a length of the flexible conduit up to a first predetermined point,
• controlling said sea plough beyond said first predetermined point from another site,
• continuing laying and burying of the flexible conduit as far as a second predetermined point, one of said sites being the land and the other comprising a waterborne vessel, and
• controlling the sea plough from the land via the umbilical cable and from the waterborne vessel via another umbilical cable, said another umbilical cable being mounted on an underwater robot at an end opposite the waterborne vessel so that the underwater robot can be connected to the sea plough for controlling the sea plough from the waterborne vessel.