Apparatus, system and method for joining elongated elements in a body of water

1. An apparatus comprising:

a frame;

a strap feeding device;

two arms, each arm configured to move with respect to the frame and configured to guide a strap around elongated elements in a body of water;

a clamping device configured to retain an end portion of the strap;

a driving device configured to advance the strap and tighten the strap around the elongated elements;

a junction device configured to join two overlapping portions of the strap to close the strap around the elongated elements; and

a cutting device configured to separate the strap upstream of the joined portions of the strap.

2. The apparatus of claim 1 , wherein the two arms are hinged to the frame and configured to move to an open position to enable the two arms to be arranged relative to the elongated elements and to a closed position in which the two arms and the frame form a closed ring around the elongated elements.

3. The apparatus of claim 1 , wherein each arm comprises a guide configured to enable the strap to advance along that arm.

4. The apparatus of claim 3 , wherein each guide is bounded by facing fins mounted on the arm, the facing fins are shaped to define a guide channel for the strap, and have a stiffness to enable the facing fins to be opened for the strap to be pulled out of the guide when the strap is tightened around the elongated elements.

5. The apparatus of claim 1 , further comprising a plurality of actuators to operate the two arms and operable with an emergency device configured to decouple the apparatus from the elongated elements.

6. A system comprising:

an apparatus comprising:

a frame;

a strap feeding device;

two arms, each arm being moveable with respect to the frame and configured to guide a strap around elongated elements in a body of water;

a clamping device configured to retain an end portion of the strap;

a driving device configured to advance the strap and tighten the strap around the elongated elements;

a junction device configured to join two overlapping portions of the strap to close the strap around the elongated elements; and

a cutting device configured to separate the strap upstream of the joined portions of the strap;

an underwater vehicle; and

an articulated arm connected to the underwater vehicle and to the apparatus, the articulated arm configured to control a position of the apparatus.

7. The system of claim 6 , wherein the underwater vehicle comprises a remote operated vehicle.

8. The system of claim 6 , further comprising:

a surface station connected to the underwater vehicle by an umbilical, and

a control device comprising a control unit located at the surface station and configured to control the underwater vehicle, the apparatus and the articulated arm.

9. The system of claim 8 , wherein the control device comprises a sensor coupled to one of the two arms and configured to at least one of: monitor the position of the apparatus with respect to the elongated elements, and monitor a relative position of each of the two arms.

10. The system of claim 8 , wherein:

the control device comprises a sensor coupled to the frame and configured to monitor a presence of the strap in a designated position, and

the junction device is controllable based on a signal provided by the sensor.

11. The system of claim 6 , wherein the umbilical is configured to supply electrical power to the underwater vehicle and to exchange a signal with the underwater vehicle.

12. The system of claim 6 , further comprising a further underwater vehicle configured to at least one of: check an operation of the apparatus and intervene responsive to an emergency.

13. The system of claim 6 , wherein the articulated arm comprises:

a plurality of elements articulatable with each other, and

a plurality of hydraulic actuators configured to control a position of each of the elements with respect to each other, with respect to the underwater vehicle and with respect to the apparatus.

14. A method for joining elongated elements in a body of water, the method comprising:

placing an apparatus in the body of water at a designated zone of the elongated elements;

coupling the apparatus to the elongated elements by an underwater vehicle and an articulated arm placed between the underwater vehicle and the apparatus at the designated zone;

guiding, by two arms of the apparatus, a strap around the elongated elements;

tightening, by a driving device of the apparatus, the strap around the elongated elements; and

joining, by a junction device of the apparatus, two overlapping portions of the strap such that the strap is closed around the elongated elements.

15. The method of claim 14 , further comprising monitoring a position of the apparatus with respect to the elongated elements by a sensor.

16. The method of claim 14 , further comprising detecting a presence of the strap at a designated position by a sensor.

17. The method of claim 14 , further comprising remotely controlling a position of the apparatus.

18. The method of claim 14 , further comprising:

placing the apparatus in the body of water at a further specified zone of the elongated elements that is a specified distance from the designated zone; and

applying a further strap around the elongated elements at the further specified zone.