NL2030600B1 - Inclined t-type pipe multi-level high-voltage electric field seabed separation method - Google Patents

Inclined t-type pipe multi-level high-voltage electric field seabed separation method Download PDF

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Publication number
NL2030600B1
NL2030600B1 NL2030600A NL2030600A NL2030600B1 NL 2030600 B1 NL2030600 B1 NL 2030600B1 NL 2030600 A NL2030600 A NL 2030600A NL 2030600 A NL2030600 A NL 2030600A NL 2030600 B1 NL2030600 B1 NL 2030600B1
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level
seabed
pipe
oil
type
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NL2030600A
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Dutch (nl)
Inventor
Yang Yong
Wu Qianqian
Liu Xinfu
Liu Chunhua
Zhang Shousen
Shang Chao
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Univ Qingdao Technology
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Classifications

    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G33/00—Dewatering or demulsification of hydrocarbon oils
    • C10G33/08—Controlling or regulating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D17/00—Separation of liquids, not provided for elsewhere, e.g. by thermal diffusion
    • B01D17/06—Separation of liquids from each other by electricity
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0063—Regulation, control including valves and floats
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D19/00—Degasification of liquids
    • B01D19/0073—Degasification of liquids by a method not covered by groups B01D19/0005 - B01D19/0042
    • B01D19/0084—Degasification of liquids by a method not covered by groups B01D19/0005 - B01D19/0042 using an electric current
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G33/00—Dewatering or demulsification of hydrocarbon oils
    • C10G33/02—Dewatering or demulsification of hydrocarbon oils with electrical or magnetic means
    • 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

Abstract

The invention provides an inclined T—type pipe multi—level high— voltage electric field seabed separation method with the characteristics of seabed crude oil three—level efficient separation, oil—gas gathering and transportation process simplifying, rapid deep dehydration and degasification, low crude oil water content, remote automatic control and the like.

Description

P1025/NLpd
INCLINED T-TYPE PIPE MULTI-LEVEL HIGH-VOLTAGE ELECTRIC FIELD
SEABED SEPARATION METHOD
TECHNICAL FIELD
The invention relates to a deepwater oil and gas field seabed crude oil direct separation method in the field of ocean engineer- ing, in particular to an inclined T-type pipe multi-level high- voltage electric field seabed separation method
BACKGROUND ART
According to ‘a seabed factory’, underwater equipment is uti- lized for directly conducting underwater separation treatment on crude oil produced from an oil bearing reservoir in the seabed so as to improve the deepwater oil and gas ultimate recovery factor and reduce input of offshore production treatment facilities, and accordingly, deepwater oil and gas economical and efficient devel- opment is achieved. Compared with a traditional underwater produc- tion system, the ‘seabed factory’ has four key technologies need- ing to be broken through, the four key technologies are a seabed pressurization system, a seabed gas compression system, a seabed separation system and a seabed power transmission and distribution system correspondingly, wherein the seabed separation system can achieve direct separation of oil, gas and water in the seabed. A very few of domestic scientific research institutions start to pay attention to an oil and water efficient separation technology in recent years, and study on the deepwater separation technology is still in a research and development and experimental study stage.
SUMMARY
To overcome the defects in the prior art, the invention pro- vides an inclined T-type pipe multi-level high-voltage electric field seabed separation method. The inclined T-type pipe multi- level high-voltage electric field seabed separation method is characterized by comprising a first-level pipe type degasser, wherein a double-layer thick-wall pipe body integrated by an inclined T-type pipe is adopted in the first-level pipe type degasser, a lower rectifica-
tion main pipe is connected with a seabed manifold through a bridging pipe, an upper degasification main pipe is connected with a seabed gas conveying pipeline through a T-type pipe and is con- nected with a second-level electric dehydration main pipe through a first-level oil conveying pipe;
a second-level inclined electric dehydrator, wherein a compo- site insulating rod-like electrode and an inclined split type thick-wall pipe body are adopted in the second-level inclined electric dehydrator, a second-level electric dehydration main pipe is upwards connected with a second-level oil conveying pipe through a T-type pipe and downwards connected with a first-level sewage pipe and a first-level water conveying manifold, and mean- while a first-level transformer provides high voltage power for the composite insulating rod-like electrode through a first-level high-voltage cable;
a third-level inclined electric dehydrator, wherein a platy bare electrode and an inclined split type thick-wall pipe body are adopted in the third-level inclined electric dehydrator, a third- level electric dehydration main pipe is upwards connected with a third-level oil conveying pipe through a T-type pipe and downwards connected with a second-level sewage pipe and a second-level water conveying manifold, a third-level oil conveying pipe is connected with a chemical agent manifold through a flow mixing pipe, and meanwhile a second-level transformer provides high voltage power for the platy bare electrode through a second-level high-voltage cable;
a seabed efflux pump, wherein a frequency conversion type double-screw booster pump is adopted in the seabed efflux pump to outwards convey third-level crude oil after pressurizing the third-level crude oil, an inlet pipe section of the seabed efflux pump is connected with a third-level oil conveying pipe, mean- while, an outlet pipe section of the seabed efflux pump is con- nected with a seabed oil conveying pipeline, one end of a driving screw extends out of the pump and is connected with a seabed fre-
quency conversion motor to provide power, and the frequency of a freguency converter is automatically adjusted according to the flowing pressure and the liquid supply amount of the third-level crude oil; and a seabed separation control system, wherein the seabed separation control system regulates and controls supply of oil well produced liquid and various levels of crude oil and the con- veying amount and the flowing pressure of natural gas and quali- fied crude oil through a pressure difference pneumatic control valve, a pressure pneumatic control valve, a liquid level pneumat- ic control valve, a seabed liquid level control valve, a pressure three-way electromagnetic valve, a liquid-level three-way electro- magnetic valve and a limiting switch.
The inclined T-type pipe multi-level high-voltage electric field seabed separation method has the beneficial effects that the seabed separation system organically combines an inclined pipe type online separation technology and a multi-level high-voltage electric field rapid deep separation technology, and based on a special mode of three-level series connection, inclined T-type pipe integration and a well field type layout, seabed crude oil three-level efficient separation and rapid deep dehydration and degasification are finally achieved; the first-level pipe type de- gasser adopts the double-layer thick-wall pipe body integrated by the inclined T-type pipe, implements first-level inclined pipe type gas-liquid separation treatment and removes natural gas from crude oil; the second-level inclined electric dehydrator adopts the composite insulating rod-like electrode and the inclined split type thick-wall pipe body, implements second-level annular high- voltage electric field crude oil rapid dehydration treatment and removes most of water from high-water-content crude oil; the third-level inclined electric dehydrator adopts the platy bare electrode and the inclined split type thick-wall pipe body, imple- ments third-level upper-strong and lower-weak double-electric- field crude oil deep dehydration treatment, and removes surplus water from second-level crude oil; and the seabed efflux pump adopts the frequency conversion type double-screw booster pump to outwards convey third-level crude oil after third-level crude oil pressurizing, and the seabed separation control system achieves remote automatic control over three-level seabed separation work and guarantees flowing safety of various levels of separation and meanwhile regulates and controls supply of oil well produced lig- uid and various levels of crude oil and the conveying amount and the flowing pressure of natural gas and qualified crude oil.
BRIEF DESCRIPTION OF THE DRAWINGS
FIG.1 is a typical structural diagram of an inclined T-type pipe multi-level high-voltage electric field seabed separation method provided by the prevent invention.
FIG.2 is a work flow schematic diagram of the method of the present invention.
FIG.3 is a seabed separation technology flow diagram of the method of the present invention.
FIG.4 is a pipeline and instrument control chart of a first- level pipe type degasser of the method of the present invention.
FIG.5 is a pipeline and instrument control chart of a second- level inclined electric dehydrator of the method of the present invention.
FIG.6 is a pipeline and instrument control chart of a third- level inclined electric dehydrator of the method of the present invention.
FIG.7 is a pipeline and instrument control chart of a seabed efflux pump in the present invention.
DETAILED DESCRIPTION OF THE EMBODIMENTS
As shown in figures, an inclined T-type pipe multi-level high-voltage electric field seabed separation system is composed of a first-level pipe type degasser 1, a second-level inclined electric dehydrator 2, a third-level inclined electric dehydrator 3, a seabed efflux pump 4 and a seabed separation control system.
The first-level pipe type degasser 1 is located at the lowest por- tion of a seabed separation prizing body and is connected with the second-level inclined electric dehydrator 2 through a first-level oil conveying pipe 8, an upper degasification main pipe 9 and a second-level electric dehydration main pipe 23, the second-level inclined electric dehydrator 2 is located at the middle portion of the seabed separation prizing body and connected with the third- level inclined electric dehydrator 3 in the manner that a flow mixing pipe 21 is upwards connected with a third-level oil inlet pipe 20 and downwards connected with a second-level oil conveying pipe 22, the third-level inclined electric dehydrator 3 is located at the uppermost portion of the seabed separation prizing body and connected with the seabed efflux pump 4 through a third-level electric dehydration main pipe 16 and a third-level oil conveying 5 pipe 17, and finally, various levels of seabed separation systems are connected in series to form a whole and form a whole seabed separation prizing body.
A lower rectification main pipe 7 is connected with a seabed manifold 5 and a seabed Christmas tree 28 through a bridging pipe 6, a pressure difference pneumatic control valve, a seabed emer- gency shutoff valve and other seabed valves and seabed flowmeters, the upper portion of the upper degasification main pipe 93 is con- nected with a seabed gas conveying pipeline 10 through a pressure pneumatic control valve and other seabed valves and seabed flowme- ters, the lower portion of the upper degasification main pipe 9 is connected with the first-level oil conveying pipe 8 through a lig- uid level pneumatic control valve, a seabed emergency shutoff valve and other seabed valves, the lower portion of the flow mix- ing pipe 21 is connected with the second-level oil conveying pipe 22 through a liquid level pneumatic control valve, a seabed emer- gency shutoff valve and other seabed valves, the third-level oil conveying pipe 17 is connected with the seabed efflux pump 4 through a seabed flowmeter, the seabed efflux pump 4 is connected with a seabed oil conveying pipeline 19 through a pressure differ- ence pneumatic control valve and other seabed valves, a first- level sewage pipe 25 is connected with a first-level water convey- ing manifold 26 through a seabed liquid level control valve, a seabed emergency shutoff valve and other seabed valves, and a sec- ond-level sewage pipe 24 is connected with a second-level water conveying manifold 27 through a seabed liquid level control valve, a seabed emergency shutoff valve and other seabed valves.
A seabed pipe cleaning ball emitter 29 is used for periodi- cally conducting pipe cleaning work on the seabed oil conveying pipeline, and during pipe cleaning work, the pressure difference pneumatic control valve and other seabed valves need to be used for blocking an outlet pipe section of the seabed efflux pump 4.
In the seabed crude oil separation treatment process of the first-level pipe type degasser 1, oil well produced liquid sequen- tially flows through the seabed manifold 5, the bridging pipe 6, a ball valve, the pressure difference pneumatic control valve 30, an insertion type intelligent electromagnetic flowmeter 31, the sea- bed emergency shutoff valve 32, a check valve and other seabed valves and seabed flowmeters and is converged to the lower recti- fication main pipe 7, natural gas obtained after two-time gas- liquid separation flows to a pipe cavity in the top of the upper degasification main pipe 9 and sequentially flows through a ball valve, the pressure pneumatic control valve 34, an intelligent gas hole plate flowmeter 33, a check valve and other seabed valves and seabed flowmeters and enters the seabed gas conveying pipeline 10 to be conveyed outwards, degassed first-level crude oil is gath- ered to a pipe cavity in the lower portion of the upper degasifi- cation main pipe 9 and sequentially flows through the first-level oil conveying pipe 8, a ball valve, the liquid level pneumatic control valve 36, a check valve and other seabed valves and enters the second-level inclined electric dehydrator 2.
According to the seabed separation control system, on one hand, a flow transmitter (FIT) on the seabed manifold 5 is used for transmitting oil well produced liquid flow signals measured by the insertion type intelligent electromagnetic flowmeter 31, and on the other hand, a flow transmitter (FIT) on the seabed gas con- veying pipeline 10 is used for transmitting natural gas flowing pressure, flow and temperature signals measured by the intelligent gas hole plate flowmeter 33 in real time. In addition, the seabed separation control system automatically closes and stops supply of the oil well produced liquid through the seabed emergency shutoff valve 32 on the seabed manifold 5, automatically releases surplus release gas in the first-level pipe type degasser 1 through a sea- bed pressure release valve 38 and adjusts the pressure in the pipe cavities, the seabed separation control system monitors the pres- sure difference between the oil well produced liquid and the first-level crude oil and between the oil well produced liquid and the third-level crude oil through two pressure difference trans- mitters (PDIT) on the seabed manifold 5, then automatically con- trols the pneumatic amount of the pressure difference pneumatic control valve 30 and regulates and controls the liquid supply amount of the oil well produced liquid.
In the seabed crude oil separation treatment process of the second-level inclined electric dehydrator 2, the first-level crude oil sequentially flows through the first-level oil conveying pipe 8, the seabed emergency shutoff valve 32 and other seabed valves and enters a pipe cavity in the middle of the second-level elec- tric dehydration main pipe 23, water drops in an annular high- voltage electric field form an induced dipole, meanwhile, small water particles are gathered into water particles with the large particle size in an accelerating manner under the action of a strong-medium-weak annular gradient electric field and are settled to a pipe cavity in the lower portion of the second-level electric dehydration main pipe 23, dehydrated first-level waste water se- quentially flows through a ball valve, the seabed liquid level control valve 39, the seabed emergency shutoff valve 32, a check valve and other seabed valves via the first-level sewage pipe 25 and then is discharged into the first-level water conveying mani- fold, instead, an oil phase reversely ascends to a pipe cavity in the upper portion of the second-level electric dehydration main pipe 23, the separated second-level crude oil flows through the second-level oil conveying pipe 22 and is sequentially output through a ball valve, the liquid level pneumatic control valve 36, a check valve and other seabed valves.
The seabed separation control system automatically monitors the liquid level of the second-level crude oil through a liquid level meter (LI) and a liquid level transmitter (LIT) on the sec- ond-level electric dehydration main pipe 23, automatically con- trols the pneumatic amount of the liquid level pneumatic control valve 36 sequentially through a liquid level indication controller (LIC), a pneumoelectric converter (LY) and a liquid level three- way electromagnetic valve 37 on the second-level oil conveying pipe 22 in combination with the liquid level condition of the sec- ond-level waste water and regulates and controls the flow of the second-level crude oil. Meanwhile, the seabed separation control system monitors the liquid level of the first-level waste water through the liquid level meter (LI) and the liquid level transmit-
ter (LIT) on the second-level electric dehydration main pipe 23, signal conversion and data processing are finished through the liquid level indication controller (LIC) and a liquid level con- verter (LY), and the flow of the first-level waste water is auto- matically regulated and controlled through the seabed liquid level control valve 39 on the first-level sewage pipe 25. In addition, the seabed separation control system monitors the liquid level of the second-level crude oil in real time through a limiting switch 40 between a first-level high-voltage cable 12 and a composite in- sulating rod-like electrode and then automatically controls start and stop of a first-level transformer 11.
In the seabed crude oil separation treatment process of the third-level inclined electric dehydrator 3, the second-level crude oil sequentially flows through the second-level oil conveying pipe 22, the seabed emergency shutoff valve 32 and other seabed valves , enters the flow mixing pipe 21 and is fully mixed with a chemi- cal agent conveyed from a chemical agent manifold 13, a ball valve, the pressure pneumatic control valve 34, a stop valve, a check valve and other seabed valves to form crude oil emulsion, then, the crude oil emulsion flows through a third-level oil inlet pipe 20 and is discharged into a pipe cavity in the middle of the third-level electric dehydration main pipe 16, large water parti- cles in a lower weak electric field are gathered and settled, then, smaller water particles are gathered in an accelerating man- ner to form water particles with the large particle size in a strong -medium-weak parallel gradient strong electric field, the water particles are settled to a pipe cavity in the lower portion of the third-level electric dehydration main pipe 16, the dehy- drated second-level waste water flows through the second-level sewage pipe 24 and sequentially flows through a ball valve, the seabed liquid level control valve 39, the seabed emergency shutoff valve 32, a check valve and other seabed valves to be discharged into the second-level water conveying manifold 27, instead, an oil phase reversely ascends to a pipe cavity in the upper portion of the third-level electric dehydration main pipe 16, the separated third-level crude oil flows through the third-level oil conveying pipe 17 and is sequentially output through a ball valve, an intel-
ligent liquid turbine flowmeter 41, a stop valve, a check valve and other seabed valves and seabed flowmeters.
The seabed separation control system monitors the pressure in the pipe cavities of the third-level electric dehydration main pipe 16 through a pressure meter (PI) and a pressure transmitter (PIT) on the third-level electric dehydration main pipe 16 and au- tomatically controls the pneumatic amount of the pressure pneumat- ic control valve 34 in the chemical agent manifold 13 sequentially through a pressure indication controller (PIC), the pneumoelectric converter (PY) and a pressure three-way electromagnetic valve 35 and regulates and controls the flow of the chemical agent. Mean- while, the seabed separation control system monitors the liquid level of the second-level waste water through a liquid level meter (LI) and a liquid level transmitter (LIT) on the third-level elec- tric dehydration main pipe 16, signal conversion and data pro- cessing are finished through the liquid level indication control- ler (LIC) and the liquid level converter (LY), and the flow of the second-level waste water is automatically regulated and controlled through the seabed liquid level control valve 39 on the second- level sewage pipe 24. In addition, the seabed separation control system monitors the liquid level of the third-level crude oil in real time through a limiting switch 40 between a second-level high-voltage cable 14 and a platy bare electrode and then automat- ically controls start and stop of a second-level transformer 15.
In the seabed outward conveying pressurizing process of the seabed efflux pump 4, the third-level crude oil sequentially flows through the third-level oil conveying pipe 17, the ball valve, the seabed pressure release valve 38 and other seabed valves and en- ters the seabed efflux pump 4, the rotating speed of a seabed fre- quency conversion motor 18 and the rotating speed of the seabed efflux pump 4 is automatically adjusted through a frequency con- verter 42, so that qualified crude oil is formed, the qualified crude oil sequentially flows through the check valve, the stop valve, the ball valve, the pressure difference pneumatic control valve 30 and other seabed valves through an outlet pipe section of the seabed efflux pump 4 and then enters the seabed oil conveying pipeline 19 to be conveyed outwards.
The seabed separation control system automatically releases and adjusts the pressure in a pump cavity of the seabed efflux pump 4 through the seabed pressure release valve 38 and monitors the pressure difference between the qualified crude oil and the oil well produced liquid and between the qualified crude oil and the third-level crude oil through two pressure difference trans- mitters (PDIT) on the outlet pipe section of the seabed efflux pump 4, automatically controls the pneumatic amount of the pres- sure difference pneumatic control valve 30 sequentially through a pressure difference indication controller (PDIC) and a pressure difference pneumcelectric converter (PDY) and regulates and con- trols the conveying amount of the qualified crude oil; and mean- while, the seabed separation control system monitors the following pressure of the third-level crude oil and the qualified crude oil through a pressure meter (PI) and a pressure transmitter (PIT) in real time and transmits pressure signals to an instant pressure displayer (PI) of a central control room, signal conversion and data processing are finished through a change-over switch (HS), the frequency of the frequency converter 42 is automatically ad- justed through a local control board 43, then the rotating speed of the seabed frequency conversion motor 18 and the rotating speed of the seabed efflux pump 4 are controlled, and it is guaranteed that the qualified crude oil in the seabed oil conveying pipeline 19 is pressurized to the outward conveying pressure or above.

Claims (1)

CONCLUSIESCONCLUSIONS 1. Scheidingsmethode op de zeebodem op meerdere niveaus met schuin geplaatste T-type leiding en elektrisch hoogspanningsveld, met het kenmerk, dat deze omvat: een ontgasser van het leidingtype op een eerste niveau, waarbij een dubbellaags dikwandig leidinglichaam dat is geïntegreerd door een schuin geplaatste T-type leiding wordt gebruikt in de ontgas- ser van het leidingtype op het eerste niveau, waarbij een lagere rectificatiehoofdleiding is verbonden met een zeebodemverdeelstuk via een overbruggingsleiding, een bovenste hoofdleiding voor ont- gassing is verbonden met een gastransportleiding op de zeebodem via een T-type leiding en is verbonden met een hoofdleiding voor elektrische dehydratie op het tweede niveau via een olietransport- leiding op het eerste niveau; een schuin geplaatste elektrische dehydrator op een tweede niveau, waarbij een samengestelde isolerende staafachtige elektrode en een schuin geplaatste dikwandig leidinglichaam van het gespleten type worden gebruikt in de schuin geplaatste elektrische dehydrator op het tweede niveau, waarbij een hoofdleiding voor elektrische dehy- dratatie op het tweede niveau naar boven is verbonden met een olietransportleiding op het tweede niveau door een leiding van het T-type en naar beneden is verbonden met een rioolbuis van het eer- ste niveau en een watertransportspruitstuk van het eerste niveau, en waarbij ondertussen een transformator op het eerste niveau hoogspanningsvermogen levert voor de samengestelde isolerende staafachtige elektrode via een hoogspanningskabel op het eerste niveau; een schuin geplaatste elektrische dehydrator op een derde niveau, waarbij een kale platy elektrode en een schuin geplaatst dikwandig leidinglichaam van het gespleten type worden gebruikt in de schuin geplaatste elektrische dehydrator op het derde niveau, waarbij een hoofdleiding voor elektrische dehydratatie op het derde niveau naar boven is verbonden met een olietransportleiding op het derde niveau door een T-type leiding en naar beneden is verbonden met een rioolleiding op het tweede niveau en een watertransportspruit-A multi-level seabed separation method with inclined T-type pipe and high voltage electric field, characterized in that it comprises: a first level pipe-type degasser, in which a double-layer thick-walled pipe body integrated by an inclined T type pipe is used in the first level pipe type degasser, where a lower rectification main pipe is connected to a seabed manifold through a bridging pipe, an upper degassing main pipe is connected to a seabed gas transport pipe through a T type conduit and is connected to a second level electrical dehydration main via a first level oil transfer line; a second level inclined electrical dehydrator using a composite insulating rod-like electrode and a split type inclined thick-walled pipe body in the second level inclined electrical dehydrator using a second level electrical dehydration main line level up is connected to a second level oil transfer pipeline by a T-type pipe and is connected downward to a first level sewage pipe and a first level water transfer manifold, meanwhile connecting a transformer on the first level level provides high voltage power for the composite insulating rod-like electrode through a first level high voltage cable; a third-level inclined electric dehydrator, using a bare platy electrode and a split-type inclined thick-walled pipe body in the third-level inclined electric dehydrator, using a third-level electrical dehydration main pipe upwards is connected to a third level oil transport line by a T-type pipe and is connected down to a second level sewer line and a water transport manifold stuk op het tweede niveau, waarbij een olietransportleiding van het derde niveau is verbonden met een spruitstuk voor chemicaliën via een stroommengleiding, en waarbij ondertussen een transforma- tor op het tweede niveau hoogspanningsvermogen levert voor de kale platy elektrode via een hoogspanningskabel op het tweede niveau; een uitstroompomp op de zeebodem, waarbij een dubbelschroefs boos- terpomp van het frequentieomzettingstype wordt gebruikt in de uit- stroompomp op de zeebodem om ruwe olie van het derde niveau naar buiten te transporteren na het onder druk zetten van de ruwe olie op het derde niveau, waarbij een inlaatleidinggedeelte van de uit- stroompomp op de zeebodem is aangesloten op een olietransportlei- ding op het derde niveau, waarbij ondertussen een uitlaatleiding- gedeelte van de uitstroompomp op de zeebodem is verbonden met een olietransportleiding op de zeebodem, waarbij een uiteinde van een aandrijfschroef uit de pomp steekt en is verbonden met een fre- gquentieomzettingsmotor op de zeebodem om stroom te leveren en waarbij de frequentie van een frequentieomvormer automatisch wordt aangepast aan de stromingsdruk en de hoeveelheid vloeistoftoevoer van de ruwe olie op het derde niveau;second level stretch, where a third level oil transfer line is connected to a chemical manifold via a flow mixing line, meanwhile a second level transformer supplies high voltage power to the bare platy electrode via a second level high voltage cable; a seabed effluent pump, in which a twin-screw frequency conversion type booster pump is used in the seabed effluent pump to transport third level crude oil out after pressurizing the third level crude oil, wherein an inlet pipe portion of the outflow pump on the seabed is connected to an oil transfer line on the third level, meanwhile an outlet pipe portion of the outflow pump on the seabed is connected with an oil transfer line on the seabed, with one end of a driving screw protrudes from the pump and is connected to a frequency conversion motor on the seabed to provide power and with the frequency of a frequency converter automatically adjusted according to the flow pressure and amount of liquid supply of the crude oil on the third level; en een regelsysteem voor de scheiding op de zeebodem, waarbij het regelsysteem voor de scheiding op de zeebodem de toevoer van vloeistof uit oliebronnen en verschillende niveaus van ruwe olie en de transporthoeveelheid en de stromingsdruk van aardgas en ge- kwalificeerde ruwe olie regelt via een pneumatische regelklep op basis van drukverschil, een pneumatische drukregelklep, een pneu- matische regelklep voor het vloeistofniveau, een regelklep voor het vloeistofniveau op de zeebodem, een elektromagnetische drieweg drukklep, een elektromagnetische driewegklep voor vloeistofniveau en een begrenzingsschakelaar.and a seabed separation control system, wherein the seabed separation control system controls the supply of fluid from oil wells and different levels of crude oil and the transport amount and flow pressure of natural gas and qualified crude oil through a pneumatic control valve based on differential pressure, a pneumatic pressure regulating valve, a pneumatic liquid level regulating valve, a seabed liquid level regulating valve, a three-way pressure solenoid valve, a three-way solenoid liquid level valve and a limit switch.
NL2030600A 2022-01-18 2022-01-18 Inclined t-type pipe multi-level high-voltage electric field seabed separation method NL2030600B1 (en)

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