Underwater self-floating waterproof tank and method of use thereof

Abstract

The invention discloses an underwater self-floating water insulation tank and a using method thereof. The underwater self-floating water insulation tank comprises a tank body and a partition plate, wherein one side of the tank body is open, and the partition plate is arranged inside the tank body. The side edges of the periphery of the partition plate are connected with the inner wall face of the tank body in a sealed mode, so that the internal space of the tank body is divided into two cavities. One cavity is communicated with the open side of the tank body, so that an isolation cavity corresponding to an outer plate of a ship body is formed. The other cavity is located on the inner side of the isolation cavity, so that a sealed cavity used for providing buoyancy after the tank body enters the water is formed. The underwater self-floating water insulation tank is suitable for welding operation of the outer plate of a ship body under the waterline; the outer plate of the ship body is isolated from seawater, backwater welding is avoided, and the welding quality is improved; in addition, the buoyancy counteracts the gravity of the isolation cavity when the isolation cavity is underwater, installation operation by a diver is facilitated, and the diving construction efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of underwater operations, in particular to an underwater self-floating waterproof tank and a method for using the same. Background technique [0002] Most of my country's offshore oilfields adopt the mining mode of FPSO (Floating Production Storage and Offloadingvessel) combined with the platform. FPSO has been operating in the oilfield to ensure the continuous production of the oilfield. In 1986, my country began to introduce FPSO for oilfield mining and production operations. For nearly 30 years, due to long-time offshore operations, regular maintenance of FPSOs is essential, but welding operations involving offshore hull plates have always been a difficult problem. [0003] FPSO works in the oil field uninterruptedly, the internal structure of the hull has been corroded by oil gas and chemicals for a long time, and the main stress structure inside the hull is obviously damaged, especially the underwater pa...

AI Technical Summary

Problems solved by technology

The longitudinals and frames that need to be replaced are all structures on the outer plate, and the outside is sea water. If the cutting and welding operations are directly performed inside the hull, the backwater welding and cutting will damage the performance of the hull outer plate. Although the backwater welding process is constantly improving Improvements are perfect, but there are still flaws

Images