The invention relates to an auxiliary lifting pontoon and a method for lifting an underwater object by using the same. The auxiliary lifting pontoon comprises a pontoon main body with two closed ends, wherein the pontoon main body comprises a cylindrical middle cabin section and two side cabin sections; the two side cabin sections are arranged at the two opposite ends of the middle cabin section; and a cavity of the middle cabin section and cavities of the side cabin sections are partitioned from each other. A first lifting lug and a second lifting lug are respectively arranged on a first side and a second side of the pontoon main body, wherein the first side and the second side are opposite to each other. First ports communicated with the cavities are respectively formed in first sides of the two side cabin sections so that the cavities of the side cabin sections can be inflated and deflated. Second ports communicated with the cavities are respectively formed in the side walls of second sides of the two side cabin sections so that water can flows in or out of the cavities of the side cabin sections. Through an underwater lifting function of the auxiliary lifting pontoon, the underwater object to be lifted, such as a single point mooring system and the like, can be lifted to am appropriate water depth for air downhole maintenance operation; therefore, the operation efficiency can be increased, the influence of wind waves can be reduced, the safety in construction can be enhanced, and offshore construction time and cost can be also reduced.
Auxiliary lifting pontoon and method for lifting underwater object by using the same
2015-10-07
Patent
Electronic Resource
English
IPC: | B63C LAUNCHING, HAULING-OUT, OR DRY-DOCKING OF VESSELS , Zuwasserlassen, Trockenstellen, Docken oder Bergen von Schiffen |