CN106430412A - Axial-flow underwater three-stage separation method and control system thereof - Google Patents
Axial-flow underwater three-stage separation method and control system thereof Download PDFInfo
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- CN106430412A CN106430412A CN201610953048.3A CN201610953048A CN106430412A CN 106430412 A CN106430412 A CN 106430412A CN 201610953048 A CN201610953048 A CN 201610953048A CN 106430412 A CN106430412 A CN 106430412A
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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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
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
The present invention relates to a kind of subsea production system oil well liquid-producing directly carries out detached method under water, more particularly to one
Plant underwater axial flow three-level separation control system and its technological process and separation method.
Background technology
At present, the oil-gas gathering and transportation of domestic and international offshore oilfield generally adopts " high pressure well stream → standpipe → platform manifold → three-phase
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 ".High-pressure well stream is by the weight of the chemical agent in three phase separator and second-stage separator and particle water
Power sedimentation is implemented oil gas water three phase and is separated, and recycles the high voltage electric field of electric dehydrator that crude oil is carried out with breakdown of emulsion and implements to take off further
Water, whole crude Treatment flow process is bulky and treatment effeciency is relatively low；In addition, high-pressure well flows through piping long distance delivery and each
After level processing system dehydration degassing, the electric energy that whole gathering and transferring process runs and heat energy excess loss are serious, not only increase platform
The electric load of electric power station system, and need to be equipped with the heaters offer heats at different levels for crude Treatment for the special heat stations system.
On the other hand, the production waste after the dehydration of crude Treatment system is higher due to oil content, and needs to configure special
Sewage disposal system, generally includes " swash plate oil expeller → dissolved air floatation machine → walnut shell filter → Water Tank " or " sewage increases
The flow processing of press pump → hydrocyclone → compact air supporting → Water Tank " becomes reinjection into reservoir or directly outer after qualified purified water
Row, the pressure that can be only achieved reinjection into reservoir after simultaneously also needing to during production waste reinjection into reservoir configure the supercharging of water filling pressure charging system will
Ask.Additionally, being directly separated the research of method both at home and abroad all also in starting and test rank for subsea production system oil well liquid-producing
Section.
Thus, by develop new be directly separated technique and method under water, by existing offshore platform oil-gas gathering and transportation and
Production wastewater treatment system is reduced to online oil-water separation system under water, this under water online water-oil separating flow process include " high-pressure well
Stream → well head ON-LINE SEPARATION system → outer defeated and the re-injection of sea pipe ".This under water online oil-water separation system by crude oil and production waste
Processing equipment moves to submarine system by offshore platform chunk, greatly simplifies crude oil and production wastewater treatment flow process, and makes
The operation power consumption of whole flow process is remarkably decreased, and finally realizes submarine system profit and efficiently separates, the exploitation in lifting deep water hydrocarbon field
Benefit.
Content of the invention
In order to overcome defect and the deficiency of existing offshore platform oil-gas gathering and transportation and the presence of production wastewater treatment method, and improve
Subsea production system oil gas is directly separated the present Research that method is still in starting and experimental stage, it is an object of the invention to provide
A kind of suitable subsea production system oil well liquid-producing directly carries out separatory axial-flow type three-level separation method and its control under water under water
System processed.This under water piece-rate system according to axial-flow type three-level water-oil separating technique and its control system, possess simplification oil-gas gathering and transportation
With production wastewater treatment flow process, reduce process flow operation power consumption, profit efficiently separates, the features such as remote auto control.
The technical solution adopted for the present invention to solve the technical problems is a kind of exploitation axial-flow type three-level separation method under water
And its control system, mainly by first order piece-rate system, second level piece-rate system, third level piece-rate system, under water induction system
With separation control system composition, implement three-level axial-flow type water-oil separating under water and the work flow of outer defeated supercharging under water.
First order piece-rate system adopts individual layer axle flow tube body, and oil well liquid-producing is converged by subsea manifold through each well subsea production tree
Collect to first order piece-rate system, implement first order axial flow type oil gas water separating treatment, most water is isolated from oil gas
Come.The flow process of separating treatment under water of first order piece-rate system is that oil well liquid-producing is in the porch shape first of first order separation body
Component stock high-speed rotational bundle simultaneously produces vortex along after the injection of tube wall tangential tilt, then pushes ahead inflow first order separation body
Taper Pipe section in and along tube wall continue axial high speed rotation, in high speed shaft flow field main component be oil-gas two-phase flow one-level fluid
Gradually migrate to the central part of first order separation body and the axial one-level fluid being advanced into first order separation body bottom is arranged
Export and enter delivery pump under water to be pressurizeed, and the higher one-level production waste of oil content is then by first order separation body bottom
One-level outfall enter second level piece-rate system.
Second level piece-rate system produces dirty using double-deck axle flow tube body, the one-level that after first order separating treatment, oil content is higher
Water enters second level piece-rate system, implements second level axial-flow type quick separating and processes, and isolates most of in one-level production waste
Oil phase.The flow process of separating treatment under water of second level piece-rate system is that one-level production waste is through in second level separation outer layer body
The entrance in portion enters in the tube chamber of second level separation outer layer body and is fully buffered, then in second level separation internal layer body
Porch be initially formed layering eddy flow, then layering eddy flow of short duration accelerate after along pipeline section constantly axially advance and progressively conflux for
Whole stock high-speed rotation stream, in high speed shaft flow field, the flow cross-section of one-level production waste constantly shrinks, and in water, oil content is relatively low
Two grades of production wastes get rid of the tube wall to second level separation internal layer body and axle flow to two grades on the right side of second level separation outer layer body
Enter third level piece-rate system after outfall, and two grades of fluid are then progressively migrated to the central authorities of second level separation internal layer body
Position simultaneously reversely rises, and is finally axially advanced into two grades of fluid outlets on the left of second level separation outer layer body and enters under water
Delivery pump is pressurizeed.
Third level piece-rate system adopts bundled tube Parallel Axis flow tube body, and in water after the separating treatment of the second level, oil content is relatively low
Two grades of production wastes enter third level piece-rate system, implement third level axial-flow type depth separating treatment, remove two grades of production wastes
In remaining oil phase.The flow process of separating treatment under water of third level piece-rate system is that two grades of production wastes separate body through the third level
The entrance of bottom enters the third level and separates in the tube chamber of body and fully buffered, and is then in pipe in third level separating pipe body
Each Parallel Axis flow tube body porch that bundle formula is evenly arranged is initially formed layering eddy flow, is then respectively layered eddy flow along Parallel Axis flow tube
The tube wall of body confluxes for whole stock high-speed rotation stream after accelerating axially to advance, in bundled tube multiaxis flow field, three-level is qualified after separating
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 the third level and separates body bottom
Purified water outlet and enter during water-supply-pipe converges, and three-level fluid is then progressively migrated to the central part of each Parallel Axis flow tube body
And reversely rise, finally axially it is advanced into the third level and separate the three-level fluid outlet on body top and enter delivery pump under water and enter
Row pressurization.
Induction system is direct after the fluid at different levels after separating under tertiary effluent are pressurized by delivery pump under water under water under water
Carry out outer defeated, the outer under water defeated supercharging flow process of induction system is under water, the one-level fluid after separating treatment under tertiary effluent, two grades of oil
The entrance manifold through induction system under water enters each booster pump under water, oil at different levels in delivery pump under water respectively for liquid and three-level fluid
Liquid is all forced into same stream pressure value and reaches outer defeated pressure requirements, and then three bursts of high pressure liquid stream are by the outlet of induction system under water
Converge and come together in same oil transportation manifold and formed the live crude of whole stock, last live crude passes through oil transportation submarine pipeline together
Defeated outward.
Separation control system is realized the detached job under water of remote auto control piece-rate system at different levels and is regulated and controled oil well liquid-producing
With the flow of live crude, ensure that the instantaneous stream pressure value of fluid at different levels in the manifold of induction system outlet under water is consistent all the time simultaneously.
The first order, under water in detached separation control system, arranges electromagnetic flowmeter in the subsea manifold at well head, and warp
The oil well liquid-producing measuring flow signal is sent in the integrated flux display instrument of Central Control Room flow transmitter, thus to oil
Well produces liquid and carries out accurate measurement；Emergency shutdown valve under water is additionally provided with subsea manifold simultaneously, occur high pressure difference signal or
When piece-rate systems at different levels break down, emergency shutdown valve can be automatically switched off and stop the supply of oil well liquid-producing under water.First fraction
Setting emergency shutdown valve under water away from the one-level fluid outlet of body, first order piece-rate system occur high pressure difference signal or
When booster pump breaks down under water of induction system under water, under water emergency shutdown valve can be automatically switched off and stop the confession of one-level fluid
Give.
The first order is under water in detached separation control system, the one-level outfall of first order separation body and the third level
It is provided with pressure transmitter, by monitoring one-level outfall and purification on the tube wall of purified water outlet separating body
Pressure condition in water outlet, and complete between pressure signal and electric signal through pressure indicating controller (PIC) and pressure converter successively
Conversion data process, finally by the flow of the subsea control valve auto-control oil well liquid-producing on subsea manifold and ensure at different levels
The stablizing of piece-rate system feed flow.Setting three-way magnetic valve and pneumatic on the tube wall of one-level outfall of first order separation body
Control valve, monitors the pressure shape of its tube chamber upper and lower by the pressure gauge on first order separation body and pressure transmitter
Condition, and successively through pressure indicating controller (PIC) and pneumatic-to-current converter by the pressure between first order separation body tube chamber upper and lower
Signal is converted into gas signal, the more pneumatic amount by three-way magnetic valve Pneumatic automatic-control control valve, and then adjust automatically one-level is dirty
The one-level production waste flow of water outlet.
The second level, under water in detached separation control system, the tube wall of second level separation outer layer body is provided with and presses under water
Power bleeder valve, separation outer layer body in the second level separates with the second level when superpressure operating mode in the tube chamber of internal layer body, presses under water
Power bleeder valve can be automatically releasable each intraluminal pressure.It is provided with ball at the B-grade sewage outlet of second level separation outer layer body
Valve, gate valve and target type meter, and two grades of production waste flow letters target type meter being measured in real time through flow transmitter
Number it is sent in the instantaneous delivery display instrument and integrated flux display instrument of Central Control Room, wherein SBL system selected by target type meter
The intelligent target type meter of row, using power inductosyn as metering and sensitive transmitting element, and combines modern digital intelligence
Treatment technology, solves high viscosity, the flow measurement of two grades of production wastes of low reynolds number.
The second level is under water in detached separation control system, second level separation outer layer body entrance and two grades of fluid outlets
It is provided with pressure difference transmitter with the tube wall of B-grade sewage outlet, by monitoring second level separation outer layer body and two respectively
Pressure reduction situation between level fluid outlet and second level separation outer layer body and B-grade sewage outlet, and successively through pressure reduction
Indicate the conversion data process that controller and differential pneumatic-to-current converter complete between pressure difference signal and gas signal, automatically control two
The pneumatic amount of differential pneumatic control valve on level fluid outlet tube wall, and then the flow of two grades of fluid of adjust automatically.Two grades of dirts
Three-way magnetic valve and pneumatic control valve are additionally provided with the tube wall of water outlet, by the pressure inverting at one-level outfall
The pressure condition in one-level outfall monitored by device, and through pneumatic-to-current converter, pressure signal is converted into gas signal, then by three
Two grades of production wastes in the pneumatic amount of three-way electromagnetic valve Pneumatic automatic-control control valve, and then adjust automatically B-grade sewage outlet
Flow.
The third level, under water in detached separation control system, the tube wall of third level separation body is provided with Underwater Pressure and lets out
Put valve, the third level separates when superpressure operating mode in body and the tube chamber of each Parallel Axis flow tube body, and Underwater Pressure bleeder valve can be certainly
The each intraluminal pressure of dynamic release.The third level separates and is provided with ball valve, gate valve and SBL series intelligence at the purified water outlet of body
Energy target type meter, SBL Series Intelligent target type meter is used for solving high viscosity, the flow measurement of low reynolds number purified water, with
When real-time monitoring purified water flow, and through flow transmitter, the water flow signal that purifies measuring is sent to wink of Central Control Room
When flow displaying instrument and integrated flux display instrument on.
The third level is under water in detached separation control system, and the third level separates body entrance and three-level fluid outlet and only
It is provided with pressure difference transmitter on the tube wall changing water outlet, separate body and the discharge of three-level fluid by monitoring the third level respectively
Pressure reduction situation between mouth and third level separation body and purified water outlet, and successively through pressure difference indication controller and pressure reduction
The conversion data that formula pneumatic-to-current converter completes between pressure difference signal and gas signal is processed, and automatically controls three-level fluid outlet tube wall
The pneumatic amount of upper differential pneumatic control valve, and then the flow of adjust automatically three-level fluid.On the tube wall of purified water outlet also
It is provided with three-way magnetic valve and pneumatic control valve, B-grade sewage is monitored by the pressure transmitter at B-grade sewage outlet and discharges
Pressure condition in mouthful, and through pneumatic-to-current converter, pressure signal is converted into gas signal, then gas is automatically controlled by three-way magnetic valve
Purification discharge in the pneumatic amount of dynamic control valve, and then adjust automatically purified water outlet.
Under water in the separation control system of outer defeated supercharging, it is provided with the entrance manifold of induction system and outlet manifold under water
Underwater Pressure bleeder valve, when respectively superpressure operating mode between the outlet of booster pump and entrance under water, corresponding Underwater Pressure is released
Valve can be automatically releasable the pressure being pressurized in pump chamber under water.It is provided with pressure transmitter under water on the entrance manifold of induction system, its
The pressure signal of the fluid at different levels measuring booster pump porch under water is sent in the instantaneous pressure display instrument of Central Control Room,
Thus grasping the pressure condition of fluid at different levels in real time.
Under water in the separation control system of outer defeated supercharging, it is provided with pressure inverting on the outlet manifold of induction system under water
Device, at its booster pump outlet under water measuring, the pressure signal of fluid at different levels is sent to the instantaneous pressure display instrument of Central Control Room
On, and complete the pressure signal after fluid superchargings at different levels and the conversion data process between electric signal through Multi-way changer, automatically
Control the frequency of each frequency converter, and then the rotating speed of each variable-frequency motor under water of adjust automatically and booster pump under water, make in outlet manifold
Instantaneous pressure value after fluid superchargings at different levels is always consistent.It is provided with pressure difference transmitter, by supervising respectively on oil transportation manifold
Pressure reduction situation between fluid at different levels after survey oil well liquid-producing and purified water and oil well liquid-producing and supercharging, and indicate through pressure reduction successively
The conversion data that controller and differential pneumatic-to-current converter complete between pressure difference signal and gas signal is processed, and automatically controls petroleum pipeline
The pneumatic amount of differential pneumatic control valve in remittance, and then the flow of adjust automatically live crude to ensure that live crude is delivered to defeated
The stablizing of oily submarine pipeline liquid measure.
What the present invention can reach has the technical effect that, this under water piece-rate system according to axial-flow type three-level water-oil separating technique and
Its control system, crude oil and production wastewater treatment equipment is moved to submarine system by offshore platform chunk, simplifies crude oil and life
Produce waste water processes, and significantly reduce the operation of whole flow process and consume energy, finally realize submarine system profit and efficiently separate；The
One-level piece-rate system adopts individual layer axle flow tube body, implements first order axial flow type oil gas water separating treatment, by most water from oil
Separate in gas；Second level piece-rate system, using double-deck axle flow tube body, is implemented second level axial-flow type quick separating and is processed, separate
Go out most oil phase in one-level production waste；Third level piece-rate system adopts bundled tube Parallel Axis flow tube body, implements the third level
Axial-flow type depth separating treatment, the remaining oil phase in two grades of production wastes of removing；Induction system will by delivery pump under water under water
Fluid at different levels after separating under tertiary effluent directly carry out outer defeated after being pressurized under water, and separation control system realizes remote auto control
Make the detached job under water of piece-rate systems at different levels and regulate and control the flow of oil well liquid-producing and live crude, ensure delivery system under water simultaneously
In system outlet manifold, the instantaneous stream pressure value of fluid at different levels is consistent all the time.
Brief description
The present invention is further illustrated below in conjunction with the accompanying drawings, but the invention is not limited in following examples.
Fig. 1 is the typical process stream according to axial-flow type proposed by the invention three-level separation method and its control system under water
Cheng Tu.
Fig. 2 is the axial-flow type pipeline of first order piece-rate system and instrument control in three-level separation method and its control system under water
Drawing.
Fig. 3 is the axial-flow type pipeline of second level piece-rate system and instrument control in three-level separation method and its control system under water
Drawing.
Fig. 4 is the axial-flow type pipeline of third level piece-rate system and instrument control in three-level separation method and its control system under water
Drawing.
Fig. 5 is that the pipeline of induction system and instrument control axial-flow type under water in three-level separation method and its control system under water
Figure.
In figure 1- subsea manifold, 2- subsea production tree, 3- first order piece-rate system, 4- induction system under water, 5-
The second-order separation system, 6- pigging transmitter under water, 7- separation control system, 8- third level piece-rate system, 9- oil transportation seabed
Pipeline, 10- electromagnetic flowmeter, 11- emergency shutdown valve under water, 12- subsea control valve, 13- first order separation body, 14-
One-level fluid outlet, 15- one-level outfall, 16- pneumatic control valve, 17- three-way magnetic valve, the differential gas of 18-
Dynamic control valve, bis- grades of fluid outlets of 19-, 20- second level separation outer layer body, 21- B-grade sewage outlet, 22- water
Lower Pressure Relief Valve, 23- target type meter, 24- three-level fluid outlet, the 25- third level separates body, 26- purified water
Outlet, 27- water delivery manifold, 28- entrance manifold, 29- booster pump under water, 30- exports manifold, 31- variable-frequency electric under water
Machine, 32- frequency converter, 33- local control panel, 34- oil transportation manifold.
Specific embodiment
In FIG, axial-flow type under water three-level separation method and its control system mainly include first order piece-rate system 3,
The second-order separation system 5, third level piece-rate system 8, under water induction system 4 and separation control system 7.First order piece-rate system 3
Entrance is linked together with subsea production tree 2 and subsea manifold 1 successively by flowmeter under water and under water valve etc., the first fraction
From the one-level outfall of system 3, by pneumatic control valve etc., valve is connected with the entrance of second level piece-rate system 5 under water,
The B-grade sewage outlet of second level piece-rate system 5 passes through flowmeter and under water valve etc. and third level piece-rate system 8 under water
Entrance is connected, and the purified water outlet of third level piece-rate system 8 passes through flowmeter and under water valve etc. and water delivery manifold under water
It is connected, fluid outlets at different levels are connected with the entrance manifold of induction system 4 under water by valve under water, induction system under water
4 booster pump under water is come together in same oil transportation manifold and is connected with oil transportation submarine pipeline 9 by valve under water by exporting manifold
It is connected together, oil transportation submarine pipeline 9 is parallel with pigging transmitter 6 under water with the oil transportation manifold building of induction system 4 under water.
In FIG, axial-flow type three-level separation method and its control system foundation axial-flow type three-level water-oil separating technique under water
And its control system, crude oil and production wastewater treatment equipment are moved to submarine system by offshore platform chunk, and passes through the first order
Piece-rate system 3 implements first order axial flow type oil gas water separating treatment, most water is separated from oil gas, by second
Level piece-rate system 5 is implemented second level axial-flow type quick separating and is processed, and isolates most oil phase in one-level production waste, finally
Third level axial-flow type depth separating treatment is implemented by third level piece-rate system 8, removes the remaining oil phase in two grades of production wastes,
Thus realize submarine system profit efficiently separating；The each booster pump under water simultaneously passing through induction system 4 under water is by lower for tertiary effluent point
From after fluid at different levels be pressurized under water after directly carry out through oil transportation submarine pipeline 9 outer defeated, thus realizing submarine system oil gas collection
Defeated；Separation control system 7 is realized the detached job under water of remote auto control piece-rate system at different levels and is ensured induction system 4 under water
In outlet manifold, the instantaneous stream pressure value of fluid at different levels is consistent all the time, and pigging transmitter 6 is then used for periodically carrying out pigging work under water
Industry, cleans out the tamper such as the interior wax depositing of oil transportation submarine pipeline 9, hydrate during oil-gas gathering and transportation under water, during pigging operation
Need to first pass through the cross over pipe of the submarine pipeline of valve closing oil transportation under water such as gate valve 9 and the oil transportation manifold building of induction system 4 under water
Road.
In fig. 2, the flow process of separating treatment under water of first order piece-rate system 3 is that oil well liquid-producing flows through submerged production successively
Tree 2 and subsea manifold 1 and electromagnetic flowmeter 10, the under water water such as emergency shutdown valve 11, ball valve, subsea control valve 12 and check-valves
Dirty gauge and valve and be collected to first order piece-rate system 3, and it is high to form share split in the porch of first order separation body 13
Rotate along tube wall axial high speed after fast eddy flow bundle, in high speed shaft flow field, one-level fluid is gradually migrated to first order separation body 13
Central part is simultaneously axially advanced into one-level fluid outlet 14, and after enter delivery pump under water through emergency shutdown valve 11 under water and carry out
Pressurization, simultaneously one-level production waste flow through by one-level outfall 15 and successively ball valve, pneumatic control valve 16 and check-valves etc.
Valve enters second level piece-rate system 5 under water.
In fig. 2, the pipeline of first order piece-rate system 3 and instrument control method are, control under water by detached separation for the first order
System 7 processed passes through the oil well liquid-producing flow signal that electromagnetic flowmeter 10 is monitored by the flow transmitter (FIT) in subsea manifold 1
Be sent in the integrated flux display instrument (FQI) of Central Control Room, by subsea manifold 1 and one-level fluid outlet 14 under water
Emergency shutdown valve 11 is automatically switched off and stops oil well liquid-producing and the supply of one-level fluid respectively；Meanwhile, by pressure transmitter
(PIT) pressure in monitoring one-level outfall 15 and third level piece-rate system 8 purified water outlet, indicates through pressure and controls
Device (PIC) and pressure converter (PY) complete signal change data process and by the subsea control valve 12 on subsea manifold 1 from
The flow of dynamic regulation and control oil well liquid-producing；By the pressure gauge (PI) on first order separation body 13 and pressure transmitter (PIT) monitoring
The pressure of first order separation body 13 tube chamber upper and lower, through the pressure indicating controller (PIC) (PY) on one-level outfall 15
Complete signal conversion with pneumatic-to-current converter (PY), then pneumatic control is driven by the three-way magnetic valve 17 on one-level outfall 15
The flow of valve 16 adjust automatically one-level production waste.
In figure 3, the flow process of separating treatment under water of second level piece-rate system 5 is that one-level production waste flows through the water such as ball valve
Lower valve enters in second level separation outer layer body 20 and is fully buffered, then within second level separation outer layer body 20
The porch of second level separation internal layer body forms layering eddy flow and progressively confluxes for whole stock high-speed rotation stream, in high speed shaft flow field
Two grades of production wastes get rid of the tube wall to second level separation internal layer body and axle flow to B-grade sewage outlet 21, then flow through successively
Flowmeter and valve enter third level segregative line under water for ball valve, gate valve, target type meter 23, pneumatic control valve 16 and check-valves etc.
System 8, simultaneously two grades of fluid progressively migrate to the central part of second level separation internal layer body and reversely rise to two grades of fluid rows
Outlet 19, delivery pump is pressurizeed under water then to flow through the valve entrance under water such as ball valve, differential pneumatic control valve 18 successively.
In figure 3, the pipeline of second level piece-rate system 5 and instrument control method are, detached separation is controlled under water for the second level
The Underwater Pressure bleeder valve 22 that system 7 processed is passed through on second level separation outer layer body 20 is automatically releasable second level separation outer layer body
20 separate the pressure in inner tube body with the second level, by the flow transmitter (FIT) on B-grade sewage outlet 21 by target formula
Two grades of production waste flow signals that flowmeter 23 monitors are sent to instantaneous delivery display instrument (FI) and the accumulation of Central Control Room
On flow displaying instrument (FQI)；Meanwhile, second level separation outer layer body 20 and two grades of oil are monitored by pressure difference transmitter (PDIT)
Pressure reduction between liquid outlet 19 and second level separation outer layer body 20 and B-grade sewage outlet 21, through two grades of fluid outlets
Pressure difference indication controller (PDIC) on 19 and differential pneumatic-to-current converter (PDY) complete signal conversion data and process and by pressing
The flow of differential pneumatic control valve 18 two grades of fluid of adjust automatically；By the pressure transmitter on one-level outfall 15
(PIT) monitor the pressure of one-level outfall 15, complete signal through the pneumatic-to-current converter (PY) on B-grade sewage outlet 21
Conversion, then pneumatic control valve two grades of production wastes of 16 adjust automatically are driven by the three-way magnetic valve 17 on B-grade sewage outlet 21
Flow.
In the diagram, the flow process of separating treatment under water of third level piece-rate system 8 is that two grades of production wastes flow through the water such as ball valve
Lower valve enters in third level separation body 25 and is fully buffered, and then separates uniform in bundled tube in body 25 in the third level
Each Parallel Axis flow tube body porch of arrangement forms layering eddy flow and confluxes for whole stock high-speed rotation stream, 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 flows through ball valve, gate valve, target successively
Flowmeter and valve enter in water delivery manifold 27 under water for formula flowmeter 23, pneumatic control valve 16 and check-valves etc., three-level oil simultaneously
Liquid is progressively migrated to the central part of each Parallel Axis flow tube body and is reversely risen to three-level fluid outlet 24, then flows through successively
Delivery pump is pressurizeed under water for the valve entrance under water such as ball valve, differential pneumatic control valve 18, check-valves.
In the diagram, the pipeline of third level piece-rate system 8 and instrument control method are, control under water by detached separation for the third level
System 7 processed by the Underwater Pressure bleeder valve 22 that the third level separates on body 25 be automatically releasable the third level separate body 25 and each simultaneously
Target type meter 23 is monitored by the pressure in shaft coupling flow tube body by the flow transmitter (FIT) on purified water outlet 26
Purify water flow signal be sent in the instantaneous delivery display instrument (FI) and integrated flux display instrument (FQI) of Central Control Room；
Meanwhile, monitor third level separation body 25 by pressure difference transmitter (PDIT) to separate with three-level fluid outlet 24 and the third level
Pressure reduction between body 25 and purified water outlet 26, through the pressure difference indication controller (PDIC) on three-level fluid outlet 24 and pressure
Differential pneumatic-to-current converter (PDY) completes signal conversion data and processes and by differential pneumatic control valve 18 adjust automatically three-level oil
The flow of liquid；Monitor the pressure of B-grade sewage outlet 21, warp by the pressure transmitter (PIT) on B-grade sewage outlet 21
Pneumatic-to-current converter (PY) on purified water outlet 26 completes signal conversion, then by the three-way magnetic valve on purified water outlet 26
The flow of 17 driving pneumatic control valve 16 adjust automatically purified waters.
In Figure 5, the outer under water defeated supercharging flow process of induction system 4 is under water, one-level fluid, two grades of fluid and three-level fluid
Enter each corresponding respectively via the entrance manifold 28 that valve and instrument are constituted under water such as ball valve, pressure gauge, pressure transmitter
Booster pump 29 under water, be forced in booster pump 29 under water same stream press rear three bursts of high pressure liquid stream respectively via pressure gauge, pressure
The outlet manifold 30 that instrument and valve are constituted under water such as power transmitter, check-valves, gate valve, ball valve and come together in same oil transportation manifold
In 34 and form the live crudes of whole stock, last live crude flows through ball valve on oil transportation manifold 34, differential pneumatic control successively
Valve enters oil transportation submarine pipeline 9 directly defeated outward under water for valve 18 processed, check-valves etc..
In Figure 5, the pipeline of induction system 4 and instrument control method are under water, and the separation of outer defeated supercharging under water controls system
The Underwater Pressure bleeder valves 22 that system 7 passes through on entrance manifold 28 and outlet manifold 30 are automatically releasable the pressure in booster pump 29 under water
The pressure signal of booster pump 29 entrance under water is sent to Central Control Room by the pressure transmitter (PIT) on entrance manifold 28 by power
Instantaneous pressure display instrument (PI) on；Meanwhile, will booster pump 29 under water by exporting the pressure transmitter (PIT) on manifold 30
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 data and processes, thus automatically controlling the frequency of each frequency converter 32 and adjust automatically respectively becomes under water
The rotating speed of frequency motor 31 and under water booster pump 29, the final instantaneous pressure value ensureing after fluid superchargings at different levels in outlet manifold 30 begins
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 reduction between fluid at different levels after supercharging, through the pressure difference indication controller (PDIC) on oil transportation manifold 34 and differential pneumatic-to-current converter
(PDY) complete signal conversion data to process and the flow by differential pneumatic control valve 18 adjust automatically live crude.
The various embodiments described above are merely to illustrate the present invention, and connected mode between wherein each system, control method etc. are all can
Be varied from, every equivalents carrying out on the basis of technical solution of the present invention and improvement, all should not exclude at this
Outside invention protection domain.
Claims (9)
1. a kind of axial-flow type three-level separation method and its control system under water, is mainly separated by first order piece-rate system, the second level
System, third level piece-rate system, under water induction system and separation control system composition, implement three-level axial-flow type water-oil separating under water
The work flow of outer defeated supercharging under water it is characterised in that：
One first order piece-rate system；Described first order piece-rate system adopts individual layer axle flow tube body, and oil well liquid-producing is adopted through under each well water
Oil tree is collected to first order piece-rate system by subsea manifold, implements first order axial flow type oil gas water separating treatment, by major part
Water separate from oil gas；Oil well liquid-producing forms share split high-speed rotational bundle and along tube wall axial direction in first order separating pipe body
High-speed rotation, in high speed shaft flow field, one-level fluid enters delivery pump under water through one-level fluid outlet and is pressurizeed, and one-level life
Produce sewage and then second level piece-rate system is entered by one-level outfall；
One second level piece-rate system；Described second level piece-rate system is using double-deck axle flow tube body, oil-containing after first order separating treatment
Measure higher one-level production waste and enter second level piece-rate system, implement second level axial-flow type quick separating and process, isolate one
Most oil phase in level production waste；One-level production waste enters second level separation outer layer body and fully buffers, then the
The second-order separation inner tube body forms layering eddy flow and progressively confluxes for whole stock high-speed rotation stream, two grades of production dirts in high speed shaft flow field
Water enters third level piece-rate system through B-grade sewage outlet, and two grades of fluid then enter delivery pump under water through two grades of fluid outlets
Pressurizeed；
One third level dehydrator；Described third level piece-rate system adopts bundled tube Parallel Axis flow tube body, after the separating treatment of the second level
In water, two grades of relatively low production wastes of oil content enter third level piece-rate system, implement third level axial-flow type depth separating treatment,
Remaining oil phase in two grades of production wastes of removing；Two grades of production wastes enter third level separation body and are fully buffered, then
Form layering eddy flow in each Parallel Axis flow tube body being evenly arranged in bundled tube in third level separating pipe body and conflux for whole stock
High-speed rotation stream, in bundled tube multiaxis flow field, purified water purified water outlet enters in water delivery manifold, and three-level fluid is then through three
Level fluid outlet enters delivery pump under water and is pressurizeed；
One induction system under water；Fluid at different levels after separating under tertiary effluent are existed by described induction system under water by delivery pump under water
Directly carry out outer defeated after being pressurized under water, one-level fluid, two grades of fluid and three-level fluid enter through entrance manifold respectively and respectively increases under water
Press pump, and come together in same oil transportation manifold and formed the live crude of whole stock by outlet manifold after being forced into same stream pressure value；
One separation control system；Described separation control system is automatically releasable second level separation outer layer by each Underwater Pressure bleeder valve
Body separates the pressure in internal layer body, third level separation body and each Parallel Axis flow tube body and each booster pump under water with the second level
Power, and the flow of two grades of production wastes and purified water, target type meter is measured in real time by target type meter and flow transmitter
From SBL Series Intelligent target type meter, using power inductosyn as metering and sensitive transmitting element；The first order is under water
Detached separation control system carries out accurate measurement by electromagnetic flowmeter to oil well liquid-producing, automatic by emergency shutdown valve under water
Oil well liquid-producing and the supply of one-level fluid closed and stopped, pressure transmitter, pressure converter and subsea control valve passed through simultaneously
The flow of auto-control oil well liquid-producing, and automatic by pressure transmitter, pneumatic-to-current converter, three-way magnetic valve and pneumatic control valve
The flow of adjustment one-level production waste；Detached separation control system passes through pressure difference transmitter, differential pneumoelectric under water for the second level
Converter and the flow of differential two grades of fluid of pneumatic control valve adjust automatically, simultaneously pass through pressure transmitter, pneumatic-to-current converter,
Three-way magnetic valve and the flow of two grades of production wastes of pneumatic control valve adjust automatically；The third level detached separation control system under water
By the flow of pressure difference transmitter, differential pneumatic-to-current converter and differential pneumatic control valve adjust automatically three-level fluid, simultaneously
Flow by pressure transmitter, pneumatic-to-current converter, three-way magnetic valve and pneumatic control valve adjust automatically purified water；Outer defeated under water
The separation control system of supercharging passes through the pressure condition that fluid at different levels grasped in real time by pressure transmitter, passes through pressure transmitter simultaneously
Automatically control the rotating speed of the frequency of each frequency converter and each variable-frequency motor under water and booster pump under water with Multi-way changer, make at different levels
Instantaneous pressure value after fluid supercharging is always consistent, and passes through pressure difference transmitter, differential pneumatic-to-current converter and differential
The flow of pneumatic control valve adjust automatically live crude.
2. axial-flow type according to claim 1 under water three-level separation method and its control system it is characterised in that：Described
The flow process of separating treatment under water of one-level piece-rate system is that oil well liquid-producing is initially formed share split in the porch of first order separation body
High-speed rotational bundle simultaneously produces vortex along after the injection of tube wall tangential tilt, then pushes ahead the Taper Pipe flowing into first order separation body
Continue axial high speed rotation, in high speed shaft flow field, main component is gradually transported for the one-level fluid of oil-gas two-phase flow in section and along tube wall
Move to the central part of first order separation body and be axially advanced into first order separation body bottom one-level fluid outlet and
Enter delivery pump under water to be pressurizeed, and the higher one-level production waste of oil content is then by the one-level of first order separation body bottom
Outfall enters second level piece-rate system.
3. axial-flow type according to claim 1 under water three-level separation method and its control system it is characterised in that：Described
The flow process of separating treatment under water of the second-order separation system is that one-level production waste enters through the entrance in the middle part of second level separation outer layer body
Enter in the tube chamber of second level separation outer layer body and fully buffered, then first in the porch of second level separation internal layer body
It is initially formed layering eddy flow, then constantly axially advance and progressively conflux along pipeline section after the of short duration acceleration of layering eddy flow and revolve at a high speed for whole stock
Turn of tidal stream, in high speed shaft flow field, the flow cross-section of one-level production waste constantly shrinks, and two grades of productions that in water, oil content is relatively low are dirty
Water gets rid of the tube wall to second level separation internal layer body and axle flow to the B-grade sewage outlet on the right side of second level separation outer layer body
Enter third level piece-rate system afterwards, and two grades of fluid is then progressively migrated to the central part reversely of second level separation internal layer body
Rise, be finally axially advanced into two grades of fluid outlets on the left of second level separation outer layer body and enter delivery pump under water and carry out
Pressurization.
4. axial-flow type according to claim 1 under water three-level separation method and its control system it is characterised in that：Described
The flow process of separating treatment under water of three-level piece-rate system is, two grades of production wastes enter the through the entrance that the third level separates body bottom
Buffered in the tube chamber of three-level separation body and fully, be then evenly arranged in bundled tube in third level separating pipe body is each
Parallel Axis flow tube body porch is initially formed layering eddy flow, and the tube wall being then respectively layered eddy flow along Parallel Axis flow tube body accelerates axially
Conflux for whole stock high-speed rotation stream after propulsion, after in bundled tube multiaxis flow field, three-level separates, qualified purified water gets rid of to each parallel connection
The tube wall of axle flow tube body is simultaneously adjusted to axial stationary flow, is then collected to the purified water outlet of third level separation body bottom simultaneously
Enter in water delivery manifold, and three-level fluid is then progressively migrated to the central part of each Parallel Axis flow tube body and reversely risen, finally
Axially it is advanced into the third level to separate the three-level fluid outlet on body top and enter delivery pump under water and pressurizeed.
5. axial-flow type according to claim 1 under water three-level separation method and its control system it is characterised in that：Described water
The outer under water defeated supercharging flow process of lower induction system is, one-level fluid after separating treatment under tertiary effluent, two grades of fluid and three-level oil
Entrance manifold through induction system under water enters each booster pump under water to liquid respectively, and in delivery pump, fluid at different levels are all forced under water
Same stream pressure value and reach outer defeated pressure requirements, then three bursts of high pressure liquid stream are come together in by the outlet manifold of induction system under water
In same oil transportation manifold and form the live crude of whole stock, it is outer defeated together that last live crude passes through oil transportation submarine pipeline.
6. axial-flow type according to claim 1 and 2 under water three-level separation method and its control system it is characterised in that：Institute
State the first order under water in detached separation control system, in the subsea manifold at well head, electromagnetic flowmeter is set, and become through flow
Send device that the oil well liquid-producing measuring flow signal is sent in the integrated flux display instrument of Central Control Room, thus to oil well liquid-producing
Carry out accurate measurement；
The described first order is under water in detached separation control system, the one-level outfall of first order separation body and the third level
It is provided with pressure transmitter, by monitoring one-level outfall and purification on the tube wall of purified water outlet separating body
Pressure condition in water outlet, and complete between pressure signal and electric signal through pressure indicating controller (PIC) and pressure converter successively
Conversion data process, finally by the flow of the subsea control valve auto-control oil well liquid-producing on subsea manifold；First fraction
Setting three-way magnetic valve and pneumatic control valve on the tube wall of the one-level outfall of body, by first order separation body
Pressure gauge and pressure transmitter monitor the pressure condition of its tube chamber upper and lower, and gentle through pressure indicating controller (PIC) successively
Pressure signal between first order separation body tube chamber upper and lower is converted into gas signal by electric transducer, then by threeway electromagnetism
The pneumatic amount of valve Pneumatic automatic-control control valve, and then the one-level production waste flow of adjust automatically one-level outfall.
7. the axial-flow type according to claim 1 or 3 under water three-level separation method and its control system it is characterised in that：Institute
State the second level under water in detached separation control system, at the B-grade sewage outlet of second level separation outer layer body, be provided with ball
Valve, gate valve and target type meter, and two grades of production waste flow letters target type meter being measured in real time through flow transmitter
Number it is sent in the instantaneous delivery display instrument and integrated flux display instrument of Central Control Room；
The described second level is under water in detached separation control system, second level separation outer layer body entrance and two grades of fluid outlets
It is provided with pressure difference transmitter with the tube wall of B-grade sewage outlet, by monitoring second level separation outer layer body and two respectively
Pressure reduction situation between level fluid outlet and second level separation outer layer body and B-grade sewage outlet, and successively through pressure reduction
Indicate the conversion data process that controller and differential pneumatic-to-current converter complete between pressure difference signal and gas signal, automatically control two
The pneumatic amount of differential pneumatic control valve on level fluid outlet tube wall, and then the flow of two grades of fluid of adjust automatically；Two grades of dirts
Three-way magnetic valve and pneumatic control valve are additionally provided with the tube wall of water outlet, by the pressure inverting at one-level outfall
The pressure condition in one-level outfall monitored by device, and through pneumatic-to-current converter, pressure signal is converted into gas signal, then by three
Two grades of production wastes in the pneumatic amount of three-way electromagnetic valve Pneumatic automatic-control control valve, and then adjust automatically B-grade sewage outlet
Flow.
8. the axial-flow type according to claim 1 or 4 under water three-level separation method and its control system it is characterised in that：Institute
State the third level under water in detached separation control system, the third level separates and is provided with ball valve, lock at the purified water outlet of body
Valve and SBL Series Intelligent target type meter, the flow of real-time monitoring purified water, and through flow transmitter by the purified water measuring
Flow signal is sent in the instantaneous delivery display instrument and integrated flux display instrument of Central Control Room；
The described third level is under water in detached separation control system, and the third level separates body entrance and three-level fluid outlet and only
It is provided with pressure difference transmitter on the tube wall changing water outlet, separate body and the discharge of three-level fluid by monitoring the third level respectively
Pressure reduction situation between mouth and third level separation body and purified water outlet, and successively through pressure difference indication controller and pressure reduction
The conversion data that formula pneumatic-to-current converter completes between pressure difference signal and gas signal is processed, and automatically controls three-level fluid outlet tube wall
The pneumatic amount of upper differential pneumatic control valve, and then the flow of adjust automatically three-level fluid；On the tube wall of purified water outlet also
It is provided with three-way magnetic valve and pneumatic control valve, B-grade sewage is monitored by the pressure transmitter at B-grade sewage outlet and discharges
Pressure condition in mouthful, and through pneumatic-to-current converter, pressure signal is converted into gas signal, then gas is automatically controlled by three-way magnetic valve
Purification discharge in the pneumatic amount of dynamic control valve, and then adjust automatically purified water outlet.
9. according to claim 1 or 5 axial-flow type under water three-level separation method and its control system it is characterised in that：Institute
State in the separation control system of defeated supercharging outside under water, be provided with pressure transmitter on the entrance manifold of induction system under water, its survey
The pressure signal of the fluid at different levels measured booster pump porch under water is sent in the instantaneous pressure display instrument of Central Control Room, from
And grasp the pressure condition of fluid at different levels in real time；
In the separation control system of described outer under water defeated supercharging, it is provided with pressure inverting on the outlet manifold of induction system under water
Device, at its booster pump outlet under water measuring, the pressure signal of fluid at different levels is sent to the instantaneous pressure display instrument of Central Control Room
On, and complete the pressure signal after fluid superchargings at different levels and the conversion data process between electric signal through Multi-way changer, automatically
Control the frequency of each frequency converter, and then the rotating speed of each variable-frequency motor under water of adjust automatically and booster pump under water, make in outlet manifold
Instantaneous pressure value after fluid superchargings at different levels is always consistent；It is provided with pressure difference transmitter, by supervising respectively on oil transportation manifold
Pressure reduction situation between fluid at different levels after survey oil well liquid-producing and purified water and oil well liquid-producing and supercharging, and indicate through pressure reduction successively
The conversion data that controller and differential pneumatic-to-current converter complete between pressure difference signal and gas signal is processed, and automatically controls petroleum pipeline
The pneumatic amount of differential pneumatic control valve in remittance, and then the flow of adjust automatically live crude to ensure that live crude is delivered to defeated
The stablizing of oily submarine pipeline liquid measure.
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| CN107269258A (en) * | 2017-06-13 | 2017-10-20 | 青岛理工大学 | The T-shaped pipe multistage pressure electric field seabed separation method of tilting |
| CN108672425A (en) * | 2018-05-16 | 2018-10-19 | 中国海洋石油集团有限公司 | A kind of automatic pigging method of deep water submarine pipeline |
| CN111825265A (en) * | 2019-04-23 | 2020-10-27 | 中国石油化工股份有限公司 | Oilfield produced water treatment method |
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| CN107269258A (en) * | 2017-06-13 | 2017-10-20 | 青岛理工大学 | The T-shaped pipe multistage pressure electric field seabed separation method of tilting |
| CN108672425A (en) * | 2018-05-16 | 2018-10-19 | 中国海洋石油集团有限公司 | A kind of automatic pigging method of deep water submarine pipeline |
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| CN114876440A (en) * | 2022-07-01 | 2022-08-09 | 东营合瑞石油技术有限责任公司 | Multi-parameter oil well metering device with cyclone separation function |
| 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 |
| CN116379346A (en) * | 2023-06-06 | 2023-07-04 | 成都伊斯顿过滤器有限公司 | Natural gas pressurizing, conveying and deoiling system |
| CN116379346B (en) * | 2023-06-06 | 2023-07-28 | 成都伊斯顿过滤器有限公司 | Natural gas pressurizing, conveying and deoiling system |
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