Cold flow system based on heat flow and material flow matching
A cold flow and logistics technology, used in pipeline systems, gas/liquid distribution and storage, mechanical equipment, etc., can solve the problems of high cost and many underwater devices, and achieve low cost, good environmental performance, and reduced wax deposition. effect of risk
Inactive Publication Date: 2012-11-28
XI AN JIAOTONG UNIV
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[0004] U.S. Patent US6774276 proposes a technology for the stable transportation of water-containing hydrocarbons in pipelines based on the SINTEF-BP cold flow idea, which comprehensively considers flow safety issues in various situations, but uses many underwater devices and relatively low cost high
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[0017] The present invention will be described in further detail below in conjunction with the accompanying drawings.
[0018] see figure 1 , if the oil well is far away from other wells, single well transportation can be considered. Including the wellbore 3 arranged in the oil (gas) well 1, the oil pipe 2 connected with the wellhead 4 is arranged in the wellbore 3, the wellhead 4 is connected with the cold flow system 5 through the oil pipeline, and the cold flow system passes through the oil pipeline 5- 9 links to each other with collecting device 6. The oil pipe 2 extends along the wellbore 3 in the oil (gas) well 1, lifts the oil (gas) from the bottom of the well to the wellhead 4, and the fluid output from the wellhead 4 directly enters the cold flow system 5 to form a stable multiphase fluid to ensure Flow safety in subsea production systems. During the flow of the fluid treated by the cold flow system 5, the temperature and pressure of the fluid do not change much, h...
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The invention relates to a cold flow system based on the matching of physical flow and heat flow. Multiphase fluid stably flows in a pipeline by the combination of the matching of multiwell gas and liquid flow rate, the control of fluid temperature, pressure and components, and cold flow technology. Fluid extracted from an oil (gas) well sequentially passes through a matching system, the cold flow system and is conveyed to an oil (gas) pipeline. The matching system matches the physical flow and the heat flow of various wells to achieve the optimal flow rate distribution. The cold flow system makes water in the multiphase fluid completely form hydrate, so that no hydrate is formed in subsequent flowing. The combination of the matching system and the cold flow system prevents the formation and deposition of the hydrate from blocking the pipeline, and ensures that the multiphase fluid stably flows in the pipeline. The cold flow system has the advantages of less dosage of chemical agents,good environmental performance, low cost and small risk in pipeline blockage and corrosion, and is suitable for long-distance conveying.
Description
technical field [0001] The invention relates to a flow safety assurance technology, specifically designing a cold flow system based on hot flow flow matching. It can be applied to the subsea production system of deep sea oilfield to ensure the flow safety of the oil and gas mixed pipeline from the subsea wellhead to the platform, and it is also suitable for the land production system. Background technique [0002] With the continuous growth of the world's energy demand, while increasing the development of existing resources, it is the main task to open up the field of deep sea oil and gas exploration and development to seek new resources. The deep sea has two notable characteristics: high hydrostatic pressure and low ambient temperature. Low ambient temperature will reduce the fluid temperature below the critical point of wax deposition and gas hydrate formation, and solid substances will precipitate and condense on the pipe wall, which will eventually lead to blockage of t...
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IPC IPC(8): F17D1/00F17D3/01
Inventor 白博峰吕孝飞
Owner XI AN JIAOTONG UNIV