Using saturation diving support vessel crane dual riser installation method

Utilizing saturation diving supporting method riser board double lift installation, characterized in that: the following installation steps: a, transmission operator to the barge; Second, the installation section of the riser rigging; three by two crane again hanging riser lower section; Fourth, the operator returns; five by two crane riser lower lift, the ship is removed; six, two crane riser lower section secured to the ship; VII decentralized riser lower into the water , and maintain the vertical riser lower section in the water; eight main crane relief; nine, underwater diving robot; ten, the lower section of the riser riser clamp fixed insert; XI, repeating the above steps until the entire riser installation complete. The present invention requires saturation diving support vessel + self-propelled barge can be installed deepwater risers, not only greatly reduce the resources may require the ship, but also improve work efficiency and economic benefits.