Method for preventing and controlling pile foundation washout of offshore oil platform
A technology for offshore oil and pile foundations, applied in infrastructure engineering, protective devices, buildings, etc., can solve problems such as fluid velocity and pressure gradient increase, sediment erosion, pits, etc.
Inactive Publication Date: 2011-03-16
CHINA UNIV OF PETROLEUM (EAST CHINA)
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Problems solved by technology
However, after the oil platform is installed, the jacket legs change the flow field distribution around the platform, and the fluid velocity and pressure gradient in some areas around the legs become larger, which may cause the sediment to start, and then move with waves and tidal currents. , leading to the erosion of sediment at the pile foundation of the jacket, and the occurrence of pits and other phenomena
Method used
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[0010] See attached picture.
[0011] According to the water flow of the pile foundation to be prevented and the production environment conditions, and considering the position of the pipeline around the pile legs, make several parts suitable for installation of the flow blocking device, and connect each part effectively.
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The invention discloses a method for preventing and controlling pile foundation washout of an offshore oil platform, which mainly relates to a method for preventing and controlling pile foundation washout of an offshore oil drilling jacket platform. The invention provides a method for preventing excessive exposure of the pile foundation when sand at the pile foundation of the jacket platform is moved to another place so as to reduce the platform washout detection times and improve the safety and stability of the platform, and further embedding methods for preventing and controlling the pile foundation washout are not needed. The technical scheme is mainly characterized in that: the sand is deposited at the bottom of the pile foundation under the condition of forming ring protection for the pile foundation; and under the condition of forming diversion of a diversion disc, the diversion directly acts on the sand flow at the pile foundation and weakens washout on the sand at the bottom of the pile foundation so as to form protection on the pile foundation and prevent the fluid around the pile foundation from directly acting on the bottom of the pile foundation.
Description
technical field [0001] The invention is used for the scouring control of the pile foundation of the oil platform in the offshore oil and gas exploitation, especially the prevention and control of the silt scouring of the pile foundation of the jacket oil platform. Background technique [0002] At present, land oil and gas resources are becoming more and more scarce, and the development of offshore oil has become an indispensable part of energy in today's world. Various forms of offshore platforms continue to develop, especially for shallow sea oil platforms. Changes in wave and current conditions lead to localized scours of the seabed, threatening the stability of the platform. Shallow sea oil platforms are located in areas with relatively shallow water depths, and the pile foundations are inserted into the sand. Before the platform is installed, the waves and currents on the seabed in a specific sea area are basically the same, and the soil geological conditions are general...
Claims
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IPC IPC(8): E02D31/00E02D27/52E02D27/12
Inventor 陈国明陈养厚林红陈团海
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)