CN106430412B - Axial flow type underwater three-stage separation method and control system thereof - Google Patents

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

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CN106430412B
CN106430412B CN201610953048.3A CN201610953048A CN106430412B CN 106430412 B CN106430412 B CN 106430412B CN 201610953048 A CN201610953048 A CN 201610953048A CN 106430412 B CN106430412 B CN 106430412B
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oil
stage
separation
underwater
flow
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CN106430412A (en
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刘新福
王优强
刘春花
肖坚夫
邵晶
尚超
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Qingdao University of Technology
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    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B43/00—Methods or apparatus for obtaining oil, gas, water, soluble or meltable materials or a slurry of minerals from wells
    • E21B43/34—Arrangements for separating materials produced by the well
    • E21B43/36—Underwater separating arrangements
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F1/00—Treatment of water, waste water, or sewage
    • C02F1/40—Devices for separating or removing fatty or oily substances or similar floating material
    • C—CHEMISTRY; METALLURGY
    • C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
    • C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
    • C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Mining & Mineral Resources (AREA)
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  • Environmental & Geological Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Organic Chemistry (AREA)
  • Water Supply & Treatment (AREA)
  • Fluid Mechanics (AREA)
  • Hydrology & Water Resources (AREA)
  • Analytical Chemistry (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Water Treatment By Electricity Or Magnetism (AREA)
  • Pipeline Systems (AREA)

Abstract

The invention provides an axial-flow type underwater three-stage separation method and a control system thereof, which are applied to underwater direct separation of produced liquid of a submarine oil well. According to the underwater separation system, the crude oil and production sewage treatment equipment is moved to the underwater system from the offshore platform block according to the axial-flow three-stage oil-water separation process and the control system thereof, so that the oil-gas gathering and transportation and production sewage treatment processes are simplified, the process operation energy consumption is reduced, and the oil-water high-efficiency separation is finally realized; most of water in oil gas is separated by primary axial-flow type oil-gas water separation treatment, most of oil phase in primary production sewage is removed by secondary axial-flow type rapid separation treatment, and residual oil phase in secondary production sewage is removed by tertiary axial-flow type deep separation treatment; the underwater conveying system directly conveys oil liquid of each stage after pressurizing the oil liquid through the underwater conveying pump, the separation control system remotely and automatically controls underwater separation operation of each stage and regulates and controls the flow of oil well produced liquid and gas-containing crude oil, and instant flowing pressure of the oil liquid of each stage after pressurizing is ensured to be consistent all the time.

Description

The underwater three-level separation method of axial-flow type and its control system
Technical field
The present invention relates to a kind of methods that subsea production system oil well liquid-producing is directly separated under water, more particularly to one Kind underwater axial flow three-level separation control system and its process flow and separation method.
Background technique
Currently, the oil-gas gathering and transportation of offshore oilfield generallys use " high pressure well stream → standpipe → platform manifold → three-phase both at home and abroad Separator → secondary heater → second-stage separator → electricity takes off booster pump → electricity and takes off heater → electric dehydrator → output pump → sea The typical process flow of pipe ".The weight that high-pressure well stream passes through chemical agent and particle water in three phase separator and second-stage separator Oil gas water three phase separation is implemented in power sedimentation, recycles the high voltage electric field of electric dehydrator to carry out demulsification to crude oil and implements further to take off Water, entire crude Treatment process is bulky and treatment effeciency is lower；In addition, high-pressure well flows through piping long distance delivery and each After grade processing system dehydration degassing, the electric energy and thermal energy excess loss of entire gathering and transferring process operation are serious, not only increase platform The electric load of electric power station system, and need to be equipped with special heat stations system and provide heat for the heaters at different levels of crude Treatment.
On the other hand, the dewatered production waste of crude Treatment system due to oil content it is higher, and need to configure special Sewage disposal system generally includes " inclined plate oil expeller → dissolved air floatation machine → walnut shell filter → Water Tank " or " sewage increases The flow processing of press pump → hydrocyclone → compact air bearing → Water Tank " is outer at reinjection into reservoir after qualified purified water or directly Row, while also being needed to configure when production waste reinjection into reservoir and can be only achieved the pressure of reinjection into reservoir after water filling pressure charging system pressurization and want It asks.In addition, being directly separated the research of method both at home and abroad also in starting and test rank for subsea production system oil well liquid-producing Section.
As a result, by develop it is novel be directly separated technique and method under water, by existing offshore platform oil-gas gathering and transportation and Production sewage treatment system is reduced to underwater online oil-water separation system, which includes " high-pressure well Stream → well head manages outer defeated and re-injection in wire separation system → sea ".The underwater online oil-water separation system is by crude oil and production waste Processing equipment moves to submarine system by offshore platform chunking, greatly simplifies crude oil and production sewage treatment process, and make The operation energy consumption of whole flow process is remarkably decreased, final to realize that submarine system grease efficiently separates, and promotes the exploitation in deep water hydrocarbon field Benefit.
Summary of the invention
In order to overcome defect and deficiency existing for existing offshore platform oil-gas gathering and transportation and production sewage treatment method, and improve Subsea production system oil gas is directly separated the present Research that method is still in starting and experimental stage, the object of the present invention is to provide A kind of suitable subsea production system oil well liquid-producing directly carries out the underwater three-level separation method of underwater separatory axial-flow type and its control System processed.The underwater separation system has simplified oil-gas gathering and transportation according to axial-flow type three-level water-oil separating technique and its control system With production sewage treatment process, process flow operation energy consumption is reduced, the features such as grease efficiently separates, remote auto control.
The technical solution adopted by the present invention to solve the technical problems is to develop a kind of underwater three-level separation method of axial-flow type And its control system, mainly by first order separation system, second level separation system, third level separation system, underwater transportation system It is formed with separation control system, implements the work flow of underwater three-level axial-flow type water-oil separating and underwater outer defeated pressurization.
First order separation system uses single layer axis flow tube body, and oil well liquid-producing is converged through each well subsea production tree by subsea manifold Collection implements first order axial flow type oil gas water separating treatment, most water is isolated from oil gas to first order separation system Come.The underwater separating treatment process of first order separation system is inlet first shape of the oil well liquid-producing in first order separation tube body Component stock high-speed rotational beam simultaneously generates vortex after the injection of tube wall tangential tilt, then pushes ahead and flows into first order separation tube body Taper Pipe section in and along tube wall continue axial high speed rotation, main component is the level-one oil liquid of oil-gas two-phase flow along high speed shaft flow field Gradually migrate to the central part of first order separation tube body and be axially advanced into the level-one oil liquid row of first order separation tube body lower part It exports and pressurizes into underwater delivery pump, and the higher level-one production waste of oil content then separates tube body bottom end by the first order Level-one outfall enter second level separation system.
Second level separation system uses the double-deck axis flow tube body, and the higher level-one production of oil content is dirty after first order separating treatment Water enters second level separation system, implements the processing of second level axial-flow type quick separating, isolates most of in level-one production waste Oily phase.The underwater separating treatment process of second level separation system is that level-one production waste is through in second level separation outer layer tube body The entrance in portion enters in the lumen of second level separation outer layer tube body and is sufficiently buffered, and then separates internal layer tube body in the second level Inlet be initially formed layering eddy flow, then be layered the of short duration acceleration of eddy flow after along pipeline section constantly axially promote and gradually converge be Whole stock high speed rotation stream, the flow cross-section of level-one production waste is constantly shunk in high speed shaft flow field, and oil content is lower in water Second level production waste gets rid of the second level being flow on the right side of tube wall from second level separation outer layer tube body to second level separation internal layer tube body and axis Enter third level separation system after outfall, and second level oil liquid is then gradually migrated to the center of second level separation internal layer tube body Position simultaneously reversely rises, and the last axial second level oil liquid outlet being advanced on the left of second level separation outer layer tube body simultaneously enters underwater Delivery pump pressurizes.
Third level separation system uses bundled tube Parallel Axis flow tube body, and oil content is lower in water after the separating treatment of the second level Second level production waste enters third level separation system, implements third level axial-flow type depth separating treatment, removes second level production waste In remaining oil phase.The underwater separating treatment process of third level separation system is that second level production waste separates tube body through the third level The entrance of lower part enters in the lumen of third level separation tube body and is sufficiently buffered, then in pipe in third level separating pipe body Each Parallel Axis flow tube body inlet that beam formula is evenly arranged is initially formed layering eddy flow, is then respectively layered eddy flow along Parallel Axis flow tube It is whole stock high speed rotation stream that the tube wall of body, which accelerates confluence after axial promote, qualified after three-level separation in bundled tube multiaxis flow field Purified water gets rid of the tube wall to each Parallel Axis flow tube body and is adjusted to axial stationary flow, is then collected to third level separation tube body bottom end Purified water outlet and enter during water-supply-pipe converges, and three-level oil liquid is then gradually migrated to the central part of each Parallel Axis flow tube body And reversely rise, the last axial three-level oil liquid outlet for being advanced into third level separation tube body top and enter underwater delivery pump into Row pressurization.
Underwater transportation system is direct after being pressurized the oil liquid at different levels after separating under tertiary effluent under water by underwater delivery pump Defeated outside carrying out, the underwater outer defeated pressurization process of underwater transportation system is level-one oil liquid, second level oil under tertiary effluent after separating treatment The entrance manifold through underwater transportation system enters each underwater booster pump respectively for liquid and three-level oil liquid, under water oil at different levels in delivery pump Liquid is forced into phase cocurrent flow pressure value and reaches outer defeated pressure requirements, then three bursts of high pressure liquid streams by underwater transportation system outlet The live crude of whole stock is converged and comes together in same oil transportation manifold and formed, last live crude passes through oil transportation submarine pipeline together It is outer defeated.
Separation control system realizes the underwater detached job of remote auto control separation systems at different levels and regulates and controls oil well liquid-producing With the flow of live crude, while guaranteeing that the instantaneous stream pressure value of oil liquid at different levels in underwater transportation system outlet manifold is consistent always.
In the separation control system of first order separation, electromagnetic flowmeter is set, and through flow in the subsea manifold at well head The oil well liquid-producing flow signal measured is sent in the integrated flux display instrument of Central Control Room by transmitter, to produce to oil well Liquid carries out accurate measurement；Underwater emergency shutdown valve is additionally provided on subsea manifold simultaneously, high pressure difference signal or at different levels is occurring When separation system breaks down, underwater emergency shutdown valve can be automatically closed and stop the supply of oil well liquid-producing.First order separating pipe Underwater emergency shutdown valve is set at the level-one oil liquid outlet of body, in first order separation system appearance high pressure difference signal or under water When the underwater booster pump of transportation system breaks down, underwater emergency shutdown valve can be automatically closed and stop the supply of level-one oil liquid.
In the separation control system of first order separation, the first order separates level-one outfall and the third level separation of tube body It is provided with pressure transmitter on the tube wall of the purified water outlet of tube body, is arranged by monitoring level-one outfall and purified water Pressure condition in outlet, and successively complete to turn between pressure signal and electric signal through pressure indicating controller (PIC) and pressure converter It changes and data processing, finally by the flow of the subsea control valve auto-control oil well liquid-producing on subsea manifold and guarantees separation at different levels The stabilization of system feed flow.The first order, which separates, is arranged three-way magnetic valve and pneumatic control on the tube wall of the level-one outfall of tube body Valve separates pressure gauge on tube body by the first order and pressure transmitter monitors the pressure condition of its lumen upper and lower part, and The first order is successively separated to through pressure indicating controller (PIC) and pneumatic-to-current converter the pressure signal between tube body lumen upper and lower part It is converted into gas signal, then by the pneumatic amount of three-way magnetic valve Pneumatic automatic-control control valve, and then adjust automatically level-one sewage is arranged The level-one production waste flow of outlet.
In the separation control system of second level separation, Underwater Pressure is provided on the tube wall of second level separation outer layer tube body and is let out Put valve, when there is superpressure operating condition in the lumen of second level separation outer layer tube body and second level separation internal layer tube body, Underwater Pressure is let out Each intraluminal pressure can be discharged automatically by putting valve.The second level separation outer layer tube body secondary sewage outlet at be provided with ball valve, Gate valve and target type meter, and the second level production waste flow signal for arriving target type meter real-time measurement through flow transmitter passes It send to the instantaneous flow display instrument and integrated flux display instrument of Central Control Room, wherein target type meter selects SBL series intelligence Energy target type meter, using power inductosyn as metering and sensitive transmitting element, and in conjunction with modern digital Intelligent treatment Technology solves the flow measurement of high viscosity, low reynolds number second level production waste.
In the separation control system of second level separation, the second level separates outer layer tube body entrance and second level oil liquid outlet and two It is provided with pressure difference transmitter on the tube wall of grade outfall, separates outer layer tube body and second level oil by monitoring the second level respectively Pressure difference situation between liquid outlet and second level separation outer layer tube body and secondary sewage outlet, and successively indicated through pressure difference Controller and differential pneumatic-to-current converter complete conversion and data processing between pressure difference signal and gas signal, automatically control second level oil The pneumatic amount of differential pneumatic control valve on liquid outlet tube wall, and then the flow of adjust automatically second level oil liquid.Secondary sewage row It is additionally provided with three-way magnetic valve and pneumatic control valve on the tube wall of outlet, is supervised by the pressure transmitter at level-one outfall The pressure condition in level-one outfall is surveyed, and pressure signal is converted into gas signal through pneumatic-to-current converter, then be powered by three The pneumatic amount of magnet valve Pneumatic automatic-control control valve, and then the second level production waste stream in adjust automatically secondary sewage outlet Amount.
In the separation control system of third level separation, Underwater Pressure is provided on the tube wall of third level separation tube body and is released When there is superpressure operating condition in the lumen of valve, third level separation tube body and each Parallel Axis flow tube body, Underwater Pressure bleeder valve can be automatic Discharge each intraluminal pressure.Ball valve, gate valve and SBL Series Intelligent are provided at the purified water outlet of third level separation tube body Target type meter, SBL Series Intelligent target type meter are used to solve the flow measurement of high viscosity, low reynolds number purified water, simultaneously The flow of real-time monitoring purified water, and the purification water flow signal measured is sent to the instantaneous of Central Control Room through flow transmitter On flow displaying instrument and integrated flux display instrument.
In the separation control system of third level separation, the third level separates tube body entrance and three-level oil liquid outlet and purified water Be provided with pressure difference transmitter on the tube wall of outlet, by monitor respectively the third level separate tube body and three-level oil liquid outlet with And the pressure difference situation between third level separation tube body and purified water outlet, and successively through pressure difference indication controller and differential gas Electric transducer completes the conversion and data processing between pressure difference signal and gas signal, automatically controls and presses on three-level oil liquid outlet tube wall The pneumatic amount of differential pneumatic control valve, and then the flow of adjust automatically three-level oil liquid.It is also set up on the tube wall of purified water outlet There are three-way magnetic valve and pneumatic control valve, is monitored in secondary sewage outlet by the pressure transmitter at secondary sewage outlet Pressure condition, and pressure signal is converted into gas signal through pneumatic-to-current converter, then by three-way magnetic valve Pneumatic automatic-control control The pneumatic amount of valve processed, and then the purification water flow in adjust automatically purified water outlet.
In the separation control system of underwater outer defeated pressurization, it is provided on the entrance manifold and outlet manifold of underwater transportation system Underwater Pressure bleeder valve, when there is superpressure operating condition between the outlet and entrance of each underwater booster pump, corresponding Underwater Pressure is released Valve can discharge the intracavitary pressure of underwater booster pump automatically.It is provided with pressure transmitter on the entrance manifold of underwater transportation system, The pressure signal of the oil liquid at different levels measured booster pump inlet under water is sent in the instantaneous pressure display instrument of Central Control Room, To grasp the pressure condition of oil liquid at different levels in real time.
In the separation control system of underwater outer defeated pressurization, pressure inverting is provided on the outlet manifold of underwater transportation system Device, the pressure signal of oil liquid at different levels is sent to the instantaneous pressure display instrument of Central Control Room at the underwater booster pump outlet measured On, and the conversion and data processing between the pressurized pressure signal of oil liquid at different levels and electric signal are completed through Multi-way changer, automatically The frequency of each frequency converter, and then the revolving speed of adjust automatically each underwater variable-frequency motor and underwater booster pump are controlled, makes to export in manifold The pressurized instantaneous pressure values of oil liquid at different levels are always consistent.It is provided with pressure difference transmitter on oil transportation manifold, by supervising respectively The pressure difference situation after oil well liquid-producing and purified water and oil well liquid-producing and pressurization between oil liquid at different levels is surveyed, and is successively indicated through pressure difference Controller and differential pneumatic-to-current converter complete conversion and data processing between pressure difference signal and gas signal, automatically control petroleum pipeline The pneumatic amount of differential pneumatic control valve in remittance, and then the flow of adjust automatically live crude and to guarantee that live crude is delivered to defeated The stabilization of oily submarine pipeline liquid measure.
Institute of the invention is attainable to be had the technical effect that, the underwater separation system according to axial-flow type three-level water-oil separating technique and Crude oil and production sewage treatment equipment are moved to submarine system by offshore platform chunking, simplify crude oil and life by its control system Waste water processes are produced, and significantly reduce the operation energy consumption of whole flow process, it is final to realize that submarine system grease efficiently separates；The Level-one separation system uses single layer axis flow tube body, implements first order axial flow type oil gas water separating treatment, by most water from oil It is separated in gas；Second level separation system implements the processing of second level axial-flow type quick separating, separation using the double-deck axis flow tube body Most oil phase in level-one production waste out；Third level separation system uses bundled tube Parallel Axis flow tube body, implements the third level Axial-flow type depth separating treatment removes the remaining oil phase in second level production waste；Underwater transportation system will by underwater delivery pump Directly progress is outer defeated after oil liquid at different levels after separating under tertiary effluent are pressurized under water, and separation control system realizes remote auto control It makes the underwater detached job of separation systems at different levels and regulates and controls the flow of oil well liquid-producing and live crude, while guaranteeing underwater delivery system The instantaneous stream pressure value of oil liquid at different levels is consistent always in system outlet manifold.
Detailed description of the invention
The present invention will be further described below with reference to the drawings, but the invention is not limited to following embodiments.
Fig. 1 is the typical process stream of the underwater three-level separation method of axial-flow type proposed according to the present invention and its control system Cheng Tu.
Fig. 2 is the pipeline of first order separation system and instrument control in the underwater three-level separation method of axial-flow type and its control system Drawing.
Fig. 3 is the pipeline of second level separation system and instrument control in the underwater three-level separation method of axial-flow type and its control system Drawing.
Fig. 4 is the pipeline of third level separation system and instrument control in the underwater three-level separation method of axial-flow type and its control system Drawing.
Fig. 5 is the pipeline of underwater transportation system and instrument control in the underwater three-level separation method of axial-flow type and its control system Figure.
1- subsea manifold in figure, 2- subsea production tree, 3- first order separation system, the underwater transportation system of 4-, 5- The second-order separation system, the underwater pigging transmitter of 6-, 7- separation control system, 8- third level separation system, 9- oil transportation seabed Pipeline, 10- electromagnetic flowmeter, the underwater emergency shutdown valve of 11-, 12- subsea control valve, the 13- first order separate tube body, 14- Level-one oil liquid outlet, 15- level-one outfall, 16- pneumatic control valve, 17- three-way magnetic valve, the differential gas of 18- Dynamic control valve, 19- second level oil liquid outlet, the second level 20- separate outer layer tube body, 21- secondary sewage outlet, 22- water Lower Pressure Relief Valve, 23- target type meter, 24- three-level oil liquid outlet, the 25- third level separate tube body, 26- purified water Outlet, 27- water delivery manifold, 28- entrance manifold, the underwater booster pump of 29-, 30- export manifold, the underwater variable-frequency electric of 31- Machine, 32- frequency converter, 33- local control panel, 34- oil transportation manifold.
Specific embodiment
In Fig. 1, the underwater three-level separation method of axial-flow type and its control system mainly include first order separation system 3, The second-order separation system 5, third level separation system 8, underwater transportation system 4 and separation control system 7.First order separation system 3 Entrance is successively linked together with subsea production tree 2 and subsea manifold 1 by underwater flowmeter and underwater valve etc., the first fraction Level-one outfall from system 3 is connected by the underwater valve such as pneumatic control valve with the entrance of second level separation system 5, The secondary sewage outlet of second level separation system 5 passes through underwater flowmeter and underwater valve etc. and third level separation system 8 Entrance is connected, and the purified water outlet of third level separation system 8 passes through underwater flowmeter and underwater valve etc. and water delivery manifold It is connected, oil liquid outlets at different levels are connected by underwater valve with the entrance manifold of underwater transportation system 4, underwater transportation system 4 underwater booster pump comes together in same oil transportation manifold and by underwater valve and the company of oil transportation submarine pipeline 9 by exporting manifold It is connected together, the oil transportation manifold building of oil transportation submarine pipeline 9 and underwater transportation system 4 is parallel with underwater pigging transmitter 6.
In Fig. 1, the underwater three-level separation method of axial-flow type and its control system are according to axial-flow type three-level water-oil separating technique And its control system, crude oil and production sewage treatment equipment are moved into submarine system by offshore platform chunking, and pass through the first order Separation system 3 implements first order axial flow type oil gas water separating treatment, and most water is separated from oil gas, passes through second Grade separation system 5 implements the processing of second level axial-flow type quick separating, isolates most oil phase in level-one production waste, finally Implement third level axial-flow type depth separating treatment by third level separation system 8, remove the remaining oil phase in second level production waste, To realize that submarine system grease efficiently separates；Simultaneously by each underwater booster pump of underwater transportation system 4 by lower point of tertiary effluent Oil liquid at different levels from after directly carried out after being pressurized under water through oil transportation submarine pipeline 9 it is outer defeated, to realize submarine system oil gas collection It is defeated；Separation control system 7 realizes the underwater detached job of remote auto control separation systems at different levels and guarantees underwater transportation system 4 The instantaneous stream pressure value for exporting oil liquid at different levels in manifold is consistent always, and underwater pigging transmitter 6 is then for periodically carrying out pigging work Industry, cleans out the tampers such as wax, the hydrate deposited during underwater oil-gas gathering and transportation in oil transportation submarine pipeline 9, when pigging operation Need to first pass through the cross over pipe that the underwater valve such as gate valve closes the oil transportation manifold building of oil transportation submarine pipeline 9 and underwater transportation system 4 Road.
In Fig. 2, the underwater separating treatment process of first order separation system 3 is that oil well liquid-producing is followed by submerged production Tree 2 and the water such as subsea manifold 1 and electromagnetic flowmeter 10, underwater emergency shutdown valve 11, ball valve, subsea control valve 12 and check-valves It flows down meter and valve and is collected to first order separation system 3, and it is high in the inlet of first order separation tube body 13 to form share split It is rotated after fast eddy flow beam along tube wall axial high speed, level-one oil liquid is gradually migrated to first order separation tube body 13 in high speed shaft flow field Central part is simultaneously axially advanced into level-one oil liquid outlet 14, and after through underwater emergency shutdown valve 11 enter underwater delivery pump carry out Pressurization, while level-one production waste is by level-one outfall 15 and followed by ball valve, pneumatic control valve 16 and check-valves etc. Underwater valve enters second level separation system 5.
In Fig. 2, the pipeline and instrument control method of first order separation system 3 are that the separation of first order separation controls system System 7 is transmitted by the oil well liquid-producing flow signal that the flow transmitter (FIT) in subsea manifold 1 monitors electromagnetic flowmeter 10 To the integrated flux display instrument (FQI) of Central Control Room, by underwater urgent on subsea manifold 1 and level-one oil liquid outlet 14 Shut-off valve 11 is automatically closed respectively and stops the supply of oil well liquid-producing and level-one oil liquid；Meanwhile it being supervised by pressure transmitter (PIT) The pressure in level-one outfall 15 and 8 purified water outlet of third level separation system is surveyed, through pressure indicating controller (PIC) (PIC) Signal conversion and data processing are completed with pressure converter (PY) and by the subsea control valve 12 auto-control oil on subsea manifold 1 The flow of well production liquid；The pressure gauge (PI) and pressure transmitter (PIT) the first fraction of monitoring on tube body 13 are separated by the first order Pressure from 13 lumen upper and lower part of tube body, through the pressure indicating controller (PIC) (PY) and pneumoelectric turn on level-one outfall 15 Parallel operation (PY) completes signal conversion, then drives pneumatic control valve 16 automatic by the three-way magnetic valve 17 on level-one outfall 15 Adjust the flow of level-one production waste.
In Fig. 3, the underwater separating treatment process of second level separation system 5 is that level-one production waste flows through the water such as ball valve Lower valve, which enters in second level separation outer layer tube body 20, sufficiently to be buffered, then inside second level separation outer layer tube body 20 The inlet that the second level separates internal layer tube body forms layering eddy flow and gradually converges for whole stock high speed rotation stream, in high speed shaft flow field Second level production waste get rid of to the second level separation internal layer tube body tube wall and axis flow to secondary sewage outlet 21, then followed by The underwater flowmeter such as ball valve, gate valve, target type meter 23, pneumatic control valve 16 and check-valves and valve enter third level segregative line System 8, while second level oil liquid gradually migrates to the central part of second level separation internal layer tube body and reversely rises to second level oil liquid row Outlet 19 then enters underwater delivery pump followed by the underwater valve such as ball valve, differential pneumatic control valve 18 and pressurizes.
In Fig. 3, the pipeline and instrument control method of second level separation system 5 are that the separation of second level separation controls system System 7 separates the Underwater Pressure bleeder valve 22 on outer layer tube body 20 by the second level and separates 20 He of outer layer tube body in the release second level automatically The second level separates the intracorporal pressure of inner tube, by the flow transmitter (FIT) on secondary sewage outlet 21 by target-type flow The second level production waste flow signal that meter 23 monitors is sent to the instantaneous flow display instrument (FI) and integrated flux of Central Control Room In display instrument (FQI)；Meanwhile the second level is monitored by pressure difference transmitter (PDIT) and separates outer layer tube body 20 and second level oil liquid row Pressure difference between outlet 19 and second level separation outer layer tube body 20 and secondary sewage outlet 21, through on second level oil liquid outlet 19 Pressure difference indication controller (PDIC) and differential pneumatic-to-current converter (PDY) complete signal conversion and data processing and by differential The flow of 18 adjust automatically second level oil liquid of pneumatic control valve；It is supervised by the pressure transmitter (PIT) on level-one outfall 15 The pressure for surveying level-one outfall 15 completes signal conversion through the pneumatic-to-current converter (PY) on secondary sewage outlet 21, then The flow of 16 adjust automatically second level production waste of pneumatic control valve is driven by the three-way magnetic valve 17 on secondary sewage outlet 21.
In Fig. 4, the underwater separating treatment process of third level separation system 8 is that second level production waste flows through the water such as ball valve Lower valve, which enters in third level separation tube body 25, sufficiently to be buffered, then uniform in bundled tube in third level separation tube body 25 It is whole stock high speed rotation stream that each Parallel Axis flow tube body inlet of arrangement, which forms layering eddy flow and converges, in bundled tube multiaxis flow field Purified water gets rid of the tube wall to each Parallel Axis flow tube body and is collected to purified water outlet 26, then followed by ball valve, gate valve, target The underwater flowmeter such as formula flowmeter 23, pneumatic control valve 16 and check-valves and valve enter in water delivery manifold 27, while three-level oil Liquid gradually migrates to the central part of each Parallel Axis flow tube body and reversely rises to three-level oil liquid outlet 24, then followed by The underwater valve such as ball valve, differential pneumatic control valve 18, check-valves enters underwater delivery pump and pressurizes.
In Fig. 4, the pipeline and instrument control method of third level separation system 8 are that the separation of third level separation controls system System 7 separates the Underwater Pressure bleeder valve 22 on tube body 25 release third level separation tube body 25 and each Parallel Axis automatically by the third level The intracorporal pressure of flow tube is monitored target type meter 23 by the flow transmitter (FIT) on purified water outlet 26 net Change water flow signal to be sent in the instantaneous flow display instrument (FI) and integrated flux display instrument (FQI) of Central Control Room；Meanwhile Third level separation tube body 25, which is monitored, by pressure difference transmitter (PDIT) separates tube body with three-level oil liquid outlet 24 and the third level Pressure difference between 25 and purified water outlet 26, through pressure difference indication controller (PDIC) on three-level oil liquid outlet 24 and differential Pneumatic-to-current converter (PDY) completes signal conversion and data processing and by differential 18 adjust automatically three-level oil liquid of pneumatic control valve Flow；The pressure of secondary sewage outlet 21 is monitored by the pressure transmitter (PIT) on secondary sewage outlet 21, it is purified Pneumatic-to-current converter (PY) on water outlet 26 completes signal conversion, then is driven by the three-way magnetic valve 17 on purified water outlet 26 The flow of dynamic 16 adjust automatically purified water of pneumatic control valve.
In Fig. 5, the underwater outer defeated pressurization process of underwater transportation system 4 is level-one oil liquid, second level oil liquid and three-level oil liquid Enter respectively via the entrance manifold 28 that the underwater valve such as ball valve, pressure gauge, pressure transmitter and instrument are constituted respectively corresponding Underwater booster pump 29, three bursts of high pressure liquid streams are forced into after phase cocurrent flow pressure in booster pump 29 under water respectively via pressure gauge, pressure Outlet manifold 30 that the underwater instrument such as power transmitter, check-valves, gate valve, ball valve and valve are constituted and come together in same oil transportation manifold 34 live crudes that are interior and forming whole stock, last live crude is followed by the ball valve on oil transportation manifold 34, differential pneumatic control The underwater valve such as valve 18 processed, check-valves enters oil transportation submarine pipeline 9 and directly outer defeated.
In Fig. 5, the pipeline and instrument control method of underwater transportation system 4 are that the separation of underwater outer defeated pressurization controls system System 7 discharges the pressure in underwater booster pump 29 by the Underwater Pressure bleeder valve 22 on entrance manifold 28 and outlet manifold 30 automatically The pressure signal of underwater 29 entrance of booster pump is sent to Central Control Room by the pressure transmitter (PIT) on entrance manifold 28 by power Instantaneous pressure display instrument (PI) on；Meanwhile by exporting the pressure transmitter (PIT) on manifold 30 for underwater booster pump 29 The pressure signal of outlet is sent in the instantaneous pressure display instrument (PI) of Central Control Room, and through multidirectional turn on local control panel 33 Parallel operation (HS) completes signal conversion and data processing, to automatically control the frequency of each frequency converter 32 and each underwater change of adjust automatically The revolving speed of frequency motor 31 and underwater booster pump 29, it is final to guarantee the oil liquid pressurized instantaneous pressure value beginnings at different levels in outlet manifold 30 It is consistent eventually；And by the pressure difference transmitter (PDIT) on oil transportation manifold 34 monitor oil well liquid-producing and purified water and oil well liquid-producing with Pressure difference after pressurization between oil liquid at different levels, through the pressure difference indication controller (PDIC) and differential pneumatic-to-current converter on oil transportation manifold 34 (PDY) signal conversion and data processing are completed and by the flow of differential 18 adjust automatically live crude of pneumatic control valve.
The various embodiments described above are merely to illustrate the present invention, wherein the connection type, control method etc. between each system are all can With what is be varied, all equivalents and improvement carried out based on the technical solution of the present invention should not be excluded at this Except invention protection scope.

Claims (9)

1.一种轴流式水下三级分离方法及其控制系统，主要由第一级分离系统、第二级分离系统、第三级分离系统、水下输送系统和分离控制系统组成，实施水下三级轴流式油水分离和水下外输增压的作业流程，其特征在于：1. An axial flow underwater three-stage separation method and its control system, which are mainly composed of a first-stage separation system, a second-stage separation system, a third-stage separation system, an underwater conveying system and a separation control system. The operation process of the lower three-stage axial flow oil-water separation and underwater external transport pressurization is characterized in that: 一第一级分离系统；所述第一级分离系统采用单层轴流管体，油井产液经各井水下采油树由水下管汇而汇集至第一级分离系统，实施第一级轴流式油气水分离处理，将大部分的水从油气中分离出来；油井产液在第一级分离管体内形成分股高速旋流束并沿管壁轴向高速旋转，高速轴流场中一级油液经一级油液排出口进入水下输送泵进行加压，而一级生产污水则由一级污水排出口进入第二级分离系统；A first-stage separation system; the first-stage separation system adopts a single-layer axial flow pipe body, and the oil production liquid is collected to the first-stage separation system through the underwater manifold through the subsea Christmas tree of each well, and the first-stage separation system is implemented. Axial-flow oil-gas-water separation treatment separates most of the water from oil and gas; oil well production fluid forms high-speed swirl beams in the first-stage separation tube and rotates at high speed along the axis of the tube wall. In the high-speed axial flow field The first-stage oil enters the underwater pump for pressurization through the first-stage oil discharge port, while the first-stage production sewage enters the second-stage separation system through the first-stage sewage discharge port; 一第二级分离系统；所述第二级分离系统采用双层轴流管体，第一级分离处理后含油量较高的一级生产污水进入第二级分离系统，实施第二级轴流式快速分离处理，分离出一级生产污水中大部分的油相；一级生产污水进入第二级分离外层管体充分缓冲，而后在第二级分离内层管体形成分层旋流并逐步汇流为整股高速旋转流，高速轴流场中二级生产污水经二级污水排出口进入第三级分离系统，二级油液则经二级油液排出口进入水下输送泵进行加压；A second-stage separation system; the second-stage separation system adopts a double-layer axial flow pipe body, and the first-stage production sewage with higher oil content after the first-stage separation treatment enters the second-stage separation system to implement the second-stage axial flow The first-stage production sewage enters the second-stage separation outer pipe body to be fully buffered, and then the second-stage separation inner pipe body forms a stratified cyclone and The gradual confluence is the whole high-speed rotating flow. The secondary production sewage in the high-speed axial flow field enters the third-stage separation system through the secondary sewage discharge port, and the secondary oil enters the underwater transfer pump through the secondary oil discharge port for addition. pressure; 一第三级分离系统；所述第三级分离系统采用管束式并联轴流管体，第二级分离处理后水中含油量较低的二级生产污水进入第三级分离系统，实施第三级轴流式深度分离处理，脱除二级生产污水中的剩余油相；二级生产污水进入第三级分离管体进行充分缓冲，而后在第三级分离管体内呈管束式均匀布置的各并联轴流管体内形成分层旋流并汇流为整股高速旋转流，管束式多轴流场中净化水经净化水排出口进入输水管汇中，三级油液则经三级油液排出口进入水下输送泵进行加压；A third-stage separation system; the third-stage separation system adopts a tube bundle type parallel axial flow tube body, and the second-stage production sewage with low oil content in the water after the second-stage separation treatment enters the third-stage separation system to implement the third-stage separation system. Axial-flow deep separation treatment removes the remaining oil phase in the secondary production sewage; the secondary production sewage enters the third-stage separation tube body for sufficient buffering, and then in the third-stage separation tube body, each parallel tube is evenly arranged in a tube bundle. The layered swirling flow is formed in the axial flow tube and the confluence is a whole high-speed swirling flow. The purified water in the tube bundle multi-axial flow field enters the water delivery manifold through the purified water discharge port, and the tertiary oil flows through the tertiary oil liquid discharge port. Enter the underwater transfer pump for pressurization; 一水下输送系统；所述水下输送系统通过水下输送泵将三级水下分离后的各级油液在水下增压后直接进行外输，一级油液、二级油液和三级油液分别经入口管汇进入各水下增压泵，且加压至相同流压值后由出口管汇汇集于同一输油管汇内并形成整股的含气原油；An underwater conveying system; the underwater conveying system directly transports the oil at all levels after the three-stage underwater separation is pressurized underwater through the underwater conveying pump, and the first-stage oil, the second-stage oil and the The three-stage oil enters each subsea booster pump through the inlet manifold, and is pressurized to the same flow pressure value and then collected in the same oil pipeline manifold by the outlet manifold to form a whole stock of gas-bearing crude oil; 一分离控制系统；所述分离控制系统通过各水下压力泄放阀自动释放第二级分离外层管体和第二级分离内层管体、第三级分离管体和各并联轴流管体以及各水下增压泵内的压力，并通过靶式流量计和流量变送器实时测量二级生产污水和净化水的流量，靶式流量计选用SBL系列智能靶式流量计，采用力感应式传感器作为计量和敏感传递元件；第一级分离的分离控制系统通过电磁流量计对油井产液进行精确计量，通过水下紧急关断阀自动关闭并停止油井产液和一级油液的供给，同时通过压力变送器、压力转换器和水下控制阀自动调控油井产液的流量，并通过压力变送器、气电转换器、三通电磁阀和气动控制阀自动调整一级生产污水的流量；第二级分离的分离控制系统通过压差变送器、压差式气电转换器和压差式气动控制阀自动调整二级油液的流量，同时通过压力变送器、气电转换器、三通电磁阀和气动控制阀自动调整二级生产污水的流量；第三级分离的分离控制系统通过压差变送器、压差式气电转换器和压差式气动控制阀自动调整三级油液的流量，同时通过压力变送器、气电转换器、三通电磁阀和气动控制阀自动调整净化水的流量；水下外输增压的分离控制系统通过压力变送器实时掌握各级油液的压力状况，同时通过压力变送器和多向转换器自动控制各变频器的频率以及各水下变频电机和水下增压泵的转速，使各级油液增压后的瞬时压力值始终保持一致，并通过压差变送器、压差式气电转换器和压差式气动控制阀自动调整含气原油的流量。A separation control system; the separation control system automatically releases the second-stage separation outer tube body and the second-stage separation inner tube body, the third-stage separation tube body and each parallel axial flow tube through each underwater pressure relief valve The pressure in the body and each underwater booster pump, and the flow rate of the secondary production sewage and purified water is measured in real time through the target flowmeter and flow transmitter. The target flowmeter uses the SBL series intelligent target flowmeter. The inductive sensor is used as a metering and sensitive transmission element; the separation control system of the first-stage separation accurately measures the oil production fluid through the electromagnetic flowmeter, and automatically closes and stops the oil well production and first-stage oil production through the underwater emergency shut-off valve. Supply, and at the same time automatically adjust the flow of oil well production fluid through pressure transmitters, pressure converters and subsea control valves, and automatically adjust primary production through pressure transmitters, gas-electric converters, three-way solenoid valves and pneumatic control valves The flow of sewage; the separation control system of the second-stage separation automatically adjusts the flow of the second-stage oil through the differential pressure transmitter, the differential pressure gas-electric converter and the differential pressure pneumatic control valve. Electric converter, three-way solenoid valve and pneumatic control valve automatically adjust the flow of secondary production sewage; the separation control system of the third-stage separation adopts differential pressure transmitter, differential pressure gas-electric converter and differential pressure pneumatic control valve Automatically adjust the flow of the three-stage oil, and at the same time automatically adjust the flow of purified water through pressure transmitters, gas-electric converters, three-way solenoid valves and pneumatic control valves; the separation control system for underwater pressure transfer is transmitted through pressure At the same time, the pressure transmitter and multi-directional converter automatically control the frequency of each frequency converter and the rotational speed of each underwater frequency conversion motor and underwater booster pump, so that the oil at all levels increases. The instantaneous pressure value after pressure is always consistent, and the flow rate of gas-containing crude oil is automatically adjusted through a differential pressure transmitter, a differential pressure gas-electric converter and a differential pressure pneumatic control valve. 2.根据权利要求1所述的轴流式水下三级分离方法及其控制系统，其特征在于：所述第一级分离系统的水下分离处理流程为，油井产液在第一级分离管体的入口处首先形成分股高速旋流束并沿管壁切向倾斜射出后产生涡流，然后向前推进流入第一级分离管体的锥管段内并沿管壁继续轴向高速旋转，高速轴流场中主要成分为油气两相流的一级油液逐渐运移至第一级分离管体的中央部位并轴向推进至第一级分离管体下部的一级油液排出口且进入水下输送泵进行加压，而含油量较高的一级生产污水则由第一级分离管体底端的一级污水排出口进入第二级分离系统。2. The axial flow underwater three-stage separation method and control system thereof according to claim 1, wherein: the underwater separation processing flow of the first-stage separation system is that oil well production liquid is separated in the first stage At the entrance of the tube body, a split high-speed swirl beam is first formed and slanted along the tube wall, and then a vortex is generated. Then, it advances forward and flows into the conical tube section of the first-stage separation tube body and continues to rotate at high speed along the tube wall in the axial direction. In the high-speed axial flow field, the primary oil whose main component is two-phase flow of oil and gas gradually migrates to the central part of the first-stage separation tube body and axially advances to the primary oil discharge outlet at the lower part of the first-stage separation tube body. The first-stage production sewage with higher oil content enters the second-stage separation system from the first-stage sewage discharge port at the bottom of the first-stage separation pipe body. 3.根据权利要求1所述的轴流式水下三级分离方法及其控制系统，其特征在于：所述第二级分离系统的水下分离处理流程为，一级生产污水经第二级分离外层管体中部的入口进入第二级分离外层管体的管腔内并进行充分缓冲，然后在第二级分离内层管体的入口处首先形成分层旋流，接着分层旋流短暂加速后沿管段不断轴向推进并逐步汇流为整股高速旋转流，在高速轴流场中一级生产污水的液流截面不断收缩，水中含油量较低的二级生产污水甩向第二级分离内层管体的管壁并轴流至第二级分离外层管体右侧的二级污水排出口后进入第三级分离系统，而二级油液则逐步运移至第二级分离内层管体的中央部位并反向上升，最后轴向推进至第二级分离外层管体左侧的二级油液排出口并进入水下输送泵进行加压。3. The axial-flow underwater three-stage separation method and control system thereof according to claim 1, wherein the underwater separation and treatment process of the second-stage separation system is that the first-stage production sewage passes through the second-stage separation process. The entrance in the middle of the outer tube body of the separation layer enters the lumen of the outer layer tube body of the second stage separation and is fully buffered, and then a stratified swirl flow is formed at the entrance of the inner tube body of the second stage separation, and then the stratified swirl flow is formed. After the flow is accelerated for a short time, it continues to advance axially along the pipe section and gradually converges into a whole high-speed rotating flow. In the high-speed axial flow field, the liquid flow section of the primary production sewage shrinks continuously, and the secondary production wastewater with lower oil content in the water is thrown to the first stage. The second stage separates the tube wall of the inner tube body and flows axially to the second stage sewage discharge port on the right side of the outer tube body of the second stage separation, and then enters the third stage separation system, while the second stage oil gradually migrates to the second stage. The central part of the inner tube body of the stage separation and rise in the opposite direction, and finally axially advance to the secondary oil discharge port on the left side of the outer tube body of the second stage separation and enter the subsea transfer pump for pressurization. 4.根据权利要求1所述的轴流式水下三级分离方法及其控制系统，其特征在于：所述第三级分离系统的水下分离处理流程为，二级生产污水经第三级分离管体下部的入口进入第三级分离管体的管腔内并进行充分缓冲，然后在第三级分离管体内呈管束式均匀布置的各并联轴流管体入口处首先形成分层旋流，接着各分层旋流沿并联轴流管体的管壁加速轴向推进后汇流为整股高速旋转流，在管束式多轴流场中三级分离后合格的净化水甩向各并联轴流管体的管壁并调整为轴向稳定流，然后汇集至第三级分离管体底端的净化水排出口并进入输水管汇中，而三级油液则逐步运移至各并联轴流管体的中央部位并反向上升，最后轴向推进至第三级分离管体顶端的三级油液排出口并进入水下输送泵进行加压。4. The axial-flow underwater three-stage separation method and control system thereof according to claim 1, wherein: the underwater separation and treatment process of the third-stage separation system is that the second-stage production sewage passes through the third-stage process. The inlet of the lower part of the separation tube enters the lumen of the third-stage separation tube and is fully buffered, and then a layered swirling flow is first formed at the inlet of each parallel axial flow tube body uniformly arranged in a tube bundle in the third-stage separation tube. Then, each layered swirling flow is accelerated and axially advanced along the tube wall of the parallel axial flow tube body, and the confluence becomes a whole high-speed swirling flow. The pipe wall of the flow pipe body is adjusted to an axial stable flow, and then collected to the purified water discharge port at the bottom of the third-stage separation pipe body and enters the water conveyance manifold, while the third-stage oil gradually migrates to each parallel axial flow. The central part of the pipe body rises in the opposite direction, and finally axially advances to the third-stage oil discharge port at the top of the third-stage separation pipe body and enters the underwater transfer pump for pressurization. 5.根据权利要求1所述的轴流式水下三级分离方法及其控制系统，其特征在于：所述水下输送系统的水下外输增压流程为，三级水下分离处理后的一级油液、二级油液和三级油液分别经水下输送系统的入口管汇进入各水下增压泵，在水下输送泵中各级油液均加压至相同流压值且达到外输压力要求，然后三股高压液流由水下输送系统的出口管汇而汇集于同一输油管汇内并形成整股的含气原油，最后含气原油通过输油海底管道一起外输。5. Axial-flow underwater three-stage separation method and control system thereof according to claim 1, is characterized in that: the underwater external transport pressurization process of described underwater conveying system is, after three-stage underwater separation processing The first-grade oil, second-grade oil and third-grade oil respectively enter each subsea booster pump through the inlet manifold of the underwater conveying system. In the subsea conveying pump, all levels of oil are pressurized to the same flow pressure Then the three high-pressure liquid flows are collected by the outlet manifold of the underwater conveying system into the same oil pipeline to form a whole strand of gas-bearing crude oil, and finally the gas-bearing crude oil is transported together through the oil submarine pipeline. . 6.根据权利要求1或2所述的轴流式水下三级分离方法及其控制系统，其特征在于：所述第一级分离的分离控制系统中，井口处的水下管汇中设置电磁流量计，并经流量变送器将测量到的油井产液流量信号传送至中控室的累积流量显示仪表上，从而对油井产液进行精确计量；6. The axial flow underwater three-stage separation method and control system thereof according to claim 1 or 2, characterized in that: in the separation control system of the first-stage separation, the underwater manifold at the wellhead is provided with Electromagnetic flowmeter, and transmit the measured oil well production flow signal to the cumulative flow display instrument in the central control room through the flow transmitter, so as to accurately measure the oil well production; 所述第一级分离的分离控制系统中，第一级分离管体的一级污水排出口和第三级分离管体的净化水排出口的管壁上均设置有压力变送器，通过监测一级污水排出口和净化水排出口内的压力状况，并依次经压力指示控制器和压力转换器完成压力信号与电信号间的转换和数据处理，最后由水下管汇上的水下控制阀自动调控油井产液的流量；第一级分离管体的一级污水排出口的管壁上设置三通电磁阀和气动控制阀，通过第一级分离管体上的压力表和压力变送器监测其管腔上部和下部的压力状况，并依次经压力指示控制器和气电转换器将第一级分离管体管腔上部和下部之间的压力信号转换成气信号，再由三通电磁阀自动控制气动控制阀的气动量，进而自动调整一级污水排出口的一级生产污水流量。In the separation control system of the first-stage separation, pressure transmitters are installed on the pipe walls of the first-stage sewage discharge port of the first-stage separation pipe body and the purified water discharge port of the third-stage separation pipe body. The pressure conditions in the first-level sewage outlet and the purified water outlet, and the pressure indicating controller and pressure converter complete the conversion and data processing between the pressure signal and the electrical signal, and finally the underwater control valve on the underwater manifold. The flow rate of oil well production is automatically regulated; a three-way solenoid valve and a pneumatic control valve are set on the pipe wall of the first-stage sewage discharge port of the first-stage separation pipe body, and the pressure gauge and pressure transmitter on the first-stage separation pipe body are passed through. Monitor the pressure conditions of the upper and lower parts of the lumen, and convert the pressure signal between the upper and lower parts of the first-stage separation tube into a gas signal through the pressure indicating controller and the gas-electric converter in turn, and then the three-way solenoid valve. Automatically control the pneumatic volume of the pneumatic control valve, and then automatically adjust the flow rate of the primary production sewage at the primary sewage outlet. 7.根据权利要求1或3所述的轴流式水下三级分离方法及其控制系统，其特征在于：所述第二级分离的分离控制系统中，第二级分离外层管体的二级污水排出口处设置有球阀、闸阀和靶式流量计，并经流量变送器将靶式流量计实时测量到的二级生产污水流量信号传送至中控室的瞬时流量显示仪表和累积流量显示仪表上；7. The axial flow underwater three-stage separation method and control system thereof according to claim 1 or 3, characterized in that: in the separation control system of the second-stage separation, the outer pipe body of the second-stage separation Ball valve, gate valve and target flowmeter are set at the secondary sewage outlet, and the real-time measurement of the secondary production sewage flow signal measured by the target flowmeter is transmitted to the instantaneous flow display instrument and cumulative flow in the central control room through the flow transmitter. display on the instrument; 所述第二级分离的分离控制系统中，第二级分离外层管体入口与二级油液排出口和二级污水排出口的管壁上均设置有压差变送器，通过分别监测第二级分离外层管体与二级油液排出口以及第二级分离外层管体与二级污水排出口之间的压差状况，并依次经压差指示控制器和压差式气电转换器完成压差信号与气信号间的转换和数据处理，自动控制二级油液排出口管壁上压差式气动控制阀的气动量，进而自动调整二级油液的流量；二级污水排出口的管壁上还设置有三通电磁阀和气动控制阀，通过一级污水排出口处的压力变送器监测一级污水排出口内的压力状况，并经气电转换器将压力信号转换成气信号，再由三通电磁阀自动控制气动控制阀的气动量，进而自动调整二级污水排出口内的二级生产污水流量。In the separation control system of the second-stage separation, differential pressure transmitters are installed on the pipe walls of the outer pipe body inlet of the second-stage separation, the secondary oil discharge port and the secondary sewage discharge port. The pressure difference between the second-stage separation outer pipe body and the secondary oil discharge port and the second-stage separation outer pipe body and the second-stage sewage discharge port, and the pressure difference indicator controller and the pressure difference gas The electrical converter completes the conversion and data processing between the differential pressure signal and the gas signal, and automatically controls the pneumatic volume of the differential pressure pneumatic control valve on the wall of the secondary oil discharge outlet, and then automatically adjusts the flow of the secondary oil; The pipe wall of the sewage outlet is also provided with a three-way solenoid valve and a pneumatic control valve. The pressure transmitter at the first-level sewage outlet is used to monitor the pressure in the first-level sewage outlet, and the pressure signal is converted by a gas-electric converter. The gas signal is generated, and then the pneumatic volume of the pneumatic control valve is automatically controlled by the three-way solenoid valve, and then the flow rate of the secondary production sewage in the secondary sewage discharge port is automatically adjusted. 8.根据权利要求1或4所述的轴流式水下三级分离方法及其控制系统，其特征在于：所述第三级分离的分离控制系统中，第三级分离管体的净化水排出口处设置有球阀、闸阀和SBL系列智能靶式流量计，实时监测净化水的流量，并经流量变送器将测量到的净化水流量信号传送至中控室的瞬时流量显示仪表和累积流量显示仪表上；8. The axial flow underwater three-stage separation method and control system thereof according to claim 1 or 4, characterized in that: in the separation control system of the third-stage separation, the purified water of the third-stage separation pipe body Ball valve, gate valve and SBL series intelligent target flowmeter are installed at the discharge port to monitor the flow of purified water in real time, and transmit the measured purified water flow signal to the instantaneous flow display instrument and cumulative flow in the central control room through the flow transmitter. display on the instrument; 所述第三级分离的分离控制系统中，第三级分离管体入口与三级油液排出口和净化水排出口的管壁上均设置有压差变送器，通过分别监测第三级分离管体与三级油液排出口以及第三级分离管体与净化水排出口之间的压差状况，并依次经压差指示控制器和压差式气电转换器完成压差信号与气信号间的转换和数据处理，自动控制三级油液排出口管壁上压差式气动控制阀的气动量，进而自动调整三级油液的流量；净化水排出口的管壁上还设置有三通电磁阀和气动控制阀，通过二级污水排出口处的压力变送器监测二级污水排出口内的压力状况，并经气电转换器将压力信号转换成气信号，再由三通电磁阀自动控制气动控制阀的气动量，进而自动调整净化水排出口内的净化水流量。In the separation control system of the third-stage separation, pressure difference transmitters are installed on the pipe wall of the third-stage separation pipe inlet, the third-stage oil liquid discharge port and the purified water discharge port. The pressure difference between the separation pipe body and the third-stage oil discharge port and the third-stage separation pipe body and the purified water discharge port, and the pressure difference signal and the differential pressure gas-electric converter are completed in turn through the pressure difference indicating controller and the pressure difference gas-electric converter. The conversion and data processing between the gas signals automatically control the pneumatic volume of the differential pressure pneumatic control valve on the pipe wall of the third-stage oil discharge outlet, and then automatically adjust the flow of the third-grade oil; the pipe wall of the purified water discharge port is also set There are three-way solenoid valve and pneumatic control valve. The pressure condition in the secondary sewage discharge port is monitored through the pressure transmitter at the secondary sewage discharge port, and the pressure signal is converted into a gas signal through a gas-electric converter, and then the three-way electromagnetic The valve automatically controls the pneumatic volume of the pneumatic control valve, and then automatically adjusts the purified water flow in the purified water discharge port. 9.根据权利要求1或5所述的轴流式水下三级分离方法及其控制系统，其特征在于：所述水下外输增压的分离控制系统中，水下输送系统的入口管汇上设置有压力变送器，其测量到的各级油液在水下增压泵入口处的压力信号传送至中控室的瞬时压力显示仪表上，从而实时掌握各级油液的压力状况；9. The axial-flow underwater three-stage separation method and control system thereof according to claim 1 or 5, characterized in that: in the separation control system of the underwater external transport pressurization, the inlet pipe of the underwater transport system There is a pressure transmitter on the sink, and the measured pressure signal of each level of oil at the inlet of the underwater booster pump is transmitted to the instantaneous pressure display instrument in the central control room, so as to grasp the pressure status of each level of oil in real time; 所述水下外输增压的分离控制系统中，水下输送系统的出口管汇上设置有压力变送器，其测量到的水下增压泵出口处各级油液的压力信号传送至中控室的瞬时压力显示仪表上，并经多向转换器完成各级油液增压后的压力信号与电信号间的转换和数据处理，自动控制各变频器的频率，进而自动调整各水下变频电机和水下增压泵的转速，使出口管汇中各级油液增压后的瞬时压力值始终保持一致；输油管汇上设置有压差变送器，通过分别监测油井产液与净化水以及油井产液与增压后各级油液之间的压差状况，并依次经压差指示控制器和压差式气电转换器完成压差信号与气信号间的转换和数据处理，自动控制输油管汇上压差式气动控制阀的气动量，进而自动调整含气原油的流量并保证含气原油输送至输油海底管道液量的稳定。In the separation control system of the underwater pressurization, the outlet manifold of the underwater conveying system is provided with a pressure transmitter, and the measured pressure signals of the oil at the outlet of the underwater booster pump are transmitted to the On the instantaneous pressure display instrument in the central control room, the multi-directional converter completes the conversion and data processing between the pressure signal after the pressurization of the oil at all levels and the electrical signal, automatically controls the frequency of each frequency converter, and then automatically adjusts each submersible The rotational speed of the variable frequency motor and the subsea booster pump keeps the instantaneous pressure values of all levels of oil pressurized in the outlet manifold consistent; a differential pressure transmitter is installed on the oil delivery manifold to monitor the oil production and purification of oil wells respectively. The pressure difference between water and oil well production fluid and the oil at all levels after pressurization is completed, and the conversion and data processing between the pressure difference signal and the gas signal are completed by the pressure difference indicating controller and the pressure difference gas-electric converter in turn. Automatically control the pneumatic volume of the differential pressure pneumatic control valve on the oil pipeline, and then automatically adjust the flow of gas-containing crude oil and ensure the stability of the liquid volume of the gas-containing crude oil transported to the oil submarine pipeline.
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NL2024676A (en) * 2019-04-18 2020-10-22 Univ Qingdao Technology Automatic Supply System For Gas-Liquid-Solid Three-Phase Separation Characteristic Test

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CN107269258B (en) * 2017-06-13 2019-03-12 青岛理工大学 Inclined T-shaped pipe multistage high-voltage electric field seabed separation method
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CN114876440B (en) * 2022-07-01 2022-10-04 东营合瑞石油技术有限责任公司 Multi-parameter oil well metering device with cyclone separation function
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CN104801071B (en) * 2015-04-14 2016-06-22 中国石油大学(华东) The online gas-liquid separation device of two-stage axial-flow type submarine pipeline

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