Flexible folding oil and water replacement oil storage system

Abstract

The invention discloses a flexible folding oil and water replacement oil storage system. The flexible folding oil and water replacement oil storage system comprises an oil storage tank shell, a flexible folding oil and water isolation wall and a hard oil and water isolation plate. The hard oil and water isolation plate is horizontally arranged in the oil storage tank shell and can vertically moveup and down in the oil storage tank shell. The flexible folding oil and water isolation wall is perpendicularly suspended at the position, located above the hard oil and water isolation plate, in theoil storage tank shell, the upper end of the flexible folding oil and water isolation wall is in seal connection with the top wall of the oil storage tank shell, and the lower end of the flexible folding oil and water isolation wall is in seal connection with the hard oil and water isolation plate. An oil tank located at the upper portion of the interior of the oil storage tank shell is enclosed by the top wall of the oil storage tank shell, the flexible folding oil and water isolation wall and the hard oil and water isolation plate together. A water tank is formed by the remaining space between the oil storage tank shell and the oil tank, and the oil tank is surrounded by the water tank. An oil injection pipeline and an oil discharge pipeline which communicate with the oil tank are arranged at the top of the oil storage tank shell, and a water injection pipeline and a water discharge pipeline which communicate with the water tank are arranged at the bottom of the oil storage tank shell.

Description

technical field [0001] The invention relates to a flexible foldable oil-water replacement oil storage system, which belongs to the field of offshore oil development. Background technique [0002] Offshore crude oil storage is an important part of offshore oil development, and it can usually be divided into three modes: above-water, surface and underwater oil storage. Among them, the two modes of oil storage on the water and on the water surface are more common, and the technology is more mature. However, oil storage on water will increase the weight and structural force of the upper facilities of the offshore platform, thereby increasing the cost; floating surface oil storage devices, such as FPSO / FSO, are greatly affected by external wind waves, ocean currents, and ice. For some small and medium-sized marginal oil fields, the economics of the above-water and water-surface oil storage modes are poor, while the underwater oil storage mode can improve the economy. Both SPAR a...

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Problems solved by technology

[0007] At present, there are many design methods or schemes for oil-water replacement compartments in which oil-water is not in direct contact or physically isolated, but they all have some defects, which make their practicability, stability or scalability insufficient, so they have not been applied for a long time

[0008] Such as Sinopec Shengli Petroleum Administration Drilling Technology Research Institute has developed an isolated oil-water replacement underwater storage tank (patent number: CN2818385Y), adding a layer of oil-water isolation cloth between crude oil and seawater to solve the problem of seawater pollution; however, Due to the softness of the oil-water isolation cloth, it is difficult to control its shape, and accidents such as damage are prone to occur

The Drilling Technology Research Institute of Shengli Petroleum Administration Bureau of Sinopec has also developed an isolated oil-water replacement underwater oil storage device using an insulating air cushion (patent number: CN2818386Y). The insulating air cushion made of soft and low-elastic airtight material can significantly reduce crude oil. The heat is lost, but the air supply tank and the air supply pipeline must be arranged, the process is relatively complicated, the cost is high, and it is difficult to popularize

The "oil-water isolated underwater oil storage tank" (patent number: CN1030433336B) developed by China University of Petroleum (East China) realizes the physical separation of oil and water through a heat-insulating physical plate and a soft oil-water isolation film around it, and cooperates with a special feeder The oil port achieves oil-water isolation and storage, but it is difficult to control the movement form of the oil-water isolation film in actual operation, and the heat preservation is also poor

The "active oil-water isolation underwater oil storage tank" (patent number: CN103158956A) developed by China University of Petroleum (East China) is divided into outer tank, inner tank and isolation layer, and is driven by hydraulic pressure. higher

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