Axial-flow underwater three-stage separation method and control system thereof

A three-stage separation and control system technology, applied in separation methods, liquid separation, mining fluids, etc., to achieve the effects of reducing operating energy consumption, efficient separation, and simplified processing procedures

Active Publication Date: 2017-02-22
QINGDAO TECHNOLOGICAL UNIVERSITY
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  • Abstract
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Problems solved by technology

In addition, the research on the direct separation method of oil well production fluid in un

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  • Axial-flow underwater three-stage separation method and control system thereof
  • Axial-flow underwater three-stage separation method and control system thereof
  • Axial-flow underwater three-stage separation method and control system thereof

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Embodiment Construction

[0028] exist figure 1 Among them, the axial-flow underwater three-stage separation method and its control system mainly include a first-stage separation system 3 , a second-stage separation system 5 , a third-stage separation system 8 , an underwater conveyance system 4 and a separation control system 7 . The inlet of the first-stage separation system 3 is sequentially connected to the subsea tree 2 and the subsea manifold 1 through subsea flowmeters and subsea valves, etc., and the first-stage sewage outlet of the first-stage separation system 3 is controlled by pneumatic control. The underwater valves such as valves are connected to the inlet of the second-stage separation system 5, and the secondary sewage discharge outlet of the second-stage separation system 5 is connected to the inlet of the third-stage separation system 8 through underwater flow meters and underwater valves. , the purified water outlet of the third-stage separation system 8 is connected to the water del...

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Abstract

The invention provides an axial-flow underwater three-stage separation method and a control system thereof which are used for underwater direct separation of undersea oil well produced fluids. According to the axial-flow three-stage oil-water separation technique and control system thereof, a crude oil and production sewage treatment facility in the underwater separation system is transferred to the underwater system from the offshore platform, thereby simplifying the oil-gas gathering and transportation process and the production sewage treatment process, lowering the operation energy consumption in the process, and finally implementing oil-water high-efficiency separation. The primary oil-gas-water separation treatment separates out most water in the oil gas, the secondary axial-flow quick separation treatment removes most oil phases in the primary production sewage, and the tertiary axial-flow deep separation treatment removes the residual oil phase in the secondary production sewage. The underwater transfer system is used for pressurizing the oil fluids in all stages by the underwater transfer pump and directly transferring the oil fluids out; and the separation control system automatically controls the underwater separation operations in all stages and regulates the flow rates of the oil well produced fluid and live crude, and ensures the transient flow pressures of the pressurized oil fluids in all stages to be consistent all the time.

Description

technical field [0001] The invention relates to a method for direct underwater separation of oil well production fluid in an underwater production system, in particular to an underwater axial flow three-stage separation control system and its process flow and separation method. Background technique [0002] At present, oil and gas gathering and transportation in offshore oilfields at home and abroad usually adopt "high-pressure well flow→standpipe→platform manifold→three-phase separator→secondary heater→secondary separator→electric booster pump→electric heater→ Typical process flow of electric dehydrator→export pump→sea pipeline”. The high-pressure well flow passes through the three-phase separator and the gravity sedimentation of the chemical agents and water particles in the secondary separator to realize the three-phase separation of oil, gas and water, and then uses the high-voltage electric field of the electric dehydrator to demulsify the crude oil for further dehydrat...

Claims

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Application Information

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IPC IPC(8): C02F1/40E21B43/36
CPCC02F1/40C02F2103/10E21B43/36
Inventor 刘新福王优强刘春花肖坚夫邵晶尚超
Owner QINGDAO TECHNOLOGICAL UNIVERSITY
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