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Method for removing rudder blades of floating production

A technology of unloading device and floating production, which is applied in the direction of warships, etc., can solve the problems of long docking period and high cost, and achieve the effect of saving docking cost, simple method and simple process

Active Publication Date: 2021-04-09
COSCO DALIAN SHIPYARD
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the gradual development of deep-sea oil fields in the world, the demand for FPSO vessels and other marine products in the international market continues to increase. FPSO vessels are generally transformed from large ships without self-propelled systems, so During the refitting process, the original rudder blade of the floating production storage and unloading device needs to be removed, but when the rudder blade is removed, the ship needs to be driven into dry dock or floating dock for disassembly, which takes a long time and costs a lot

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  • Method for removing rudder blades of floating production
  • Method for removing rudder blades of floating production
  • Method for removing rudder blades of floating production

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Embodiment Construction

[0016] Such as Figure 1 to Figure 4 As shown, the floating production, storage and unloading device rudder blade removal method in water, the rudder blade 9 is located at the tail of the floating production, storage and unloading device ship 11, and is submerged 4.7m below the water surface in the ship's own floating state. The entire installation process is on the water Carry out, the specific dismantling method includes the following steps: A. First, prepare four 100-ton main suspension lugs 1 to respectively weld the FPSO ship stern 11 on the upper side of the outer plate and the designated positions on both sides of the rudder blade 9, and place one 100-ton hoist Transport lifting lug 2 is welded at the specified position on the upper end of rudder blade 9, and then prepare four 20-ton rear adjustment lifting lugs 4, respectively weld the lower side of the outer plate of the stern 11 of the floating production, storage and unloading device, and the specified position on th...

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Abstract

The invention discloses a method for removing rudder blades of a floating production, storage and unloading device on water, which comprises the following steps: A, mounting main suspension lifting lugs on the upper side of a ship tail outer plate and two sides of the rudder blades, mounting lifting lugs at the upper ends of the rudder blades, and mounting rear-side adjusting lifting lugs on the lower side of the ship tail outer plate and the upper ends of the rudder blades, arranging front-side adjusting lifting lugs at the tail part of the ship and the middle part of the rudder blade; B, connecting and tensioning a pneumatic hoist and a main suspension lifting lug, connecting and tensioning a chain block and a rear side adjusting lifting lug, and connecting a sea crane and a hoisting lifting lug together; C, cutting off the rudder stock and the rudder blade, keeping the sea crane at a fixed height, releasing the lengths of the chain block and the pneumatic hoist, enabling the rudder blade to rotate gradually, and transferring the weight gradually to the sea crane from the pneumatic hoist; and D, after rotating in place, removing the connection between the chain block and the rudder blade, and removing the connection between the chain block and the rudder blade. The dismantling method is simple, concise in process, low in material cost, wide in application range and high in operability and repeatability.

Description

technical field [0001] The invention relates to a method for removing rudder blades of a floating production, storage and unloading device on water. Background technique [0002] With the gradual development of deep-sea oil fields in the world, the demand for FPSO vessels and other marine products in the international market continues to increase. FPSO vessels are generally transformed from large ships without self-propelled systems, so During the conversion process, the original rudder blade of the floating production storage and unloading device needs to be removed. However, when removing the rudder blade, the ship needs to be driven into dry dock or floating dock for disassembly, which takes a long time and costs a lot. Contents of the invention [0003] The purpose of the present invention is to provide a method for dismantling the rudder blade of a floating production storage and unloading device on water, which can reduce the dismantling cost and improve the conversi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B63B85/00
CPCB63B85/00
Inventor 张平
Owner COSCO DALIAN SHIPYARD
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