What role does an underwater robot play in a lifting?

The lifting method of water machinery and equipment is divided into two kinds. Large and medium-sized underwater structures exceeding 300 tons must use large and medium-sized crane vessels. The crane lifting rope of this type of ship is long enough to immediately put the structural parts into the deep sea, many have the effect of lifting compensation, which can complete the landing of the structure. In addition, you can also use door hanging blowout preventer and other equipment immediately sent to the deep sea. For smaller structures, such as those below 250 tons, general marine engineering vessels can be used for lifting. However, when such vessels are working at deep water, due to the insufficient length of the lifting rope, the structure (machine equipment) must first be hoisted under the outboard into the splash area below, and then replaced with a lift winch to put the machinery and equipment under the deep sea. No matter what kind of lifting method is chosen, ROV must be used to carry out a full line inspection, and its guide cable and lifting hook buckle unspoken.

In the whole process of hoisting, the underwater structure is accurately positioned with a long reference line. The acoustic material sensor, mobile phone gyroscope, and depth gauge are installed in the overall package for precise positioning, which can be easily retrieved by the underwater robot. In the whole process here, the underwater robot can assist in the precise positioning of the lifting structure and estimate whether the structure is aligned at both ends and level. Underwater robots can also be used to install overflow valves, multi-component watt-hour meters, and water pressure regulating valve boxes, and use flying heads to detect tight working pressures.

The installation of fixed anchors must be assisted by underwater robots, and then the laying of pipe cables has just begun. It can also be used to extend the J-tube and I-tube into position. In the whole process of all normal pipelines and the delivery of the fetal umbilical cable, the contact address is generally continuously monitored by an underwater robot. Flying cables and jumper connections must be used in the middle of the underwater production system, oil output pipeline, underwater equipment, Christmas tree, manifold, and pipeline terminal equipment.

The flying cable can be accurately positioned with the ROV towing belt immediately, and the cross-docking must be hoisted in the ship, and then the precise positioning connection is carried out with the help of the underwater robot.

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