CN106439502A - Vertical pipe interior slug flow online monitoring device and elimination method - Google Patents
Vertical pipe interior slug flow online monitoring device and elimination method Download PDFInfo
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- CN106439502A CN106439502A CN201610821162.0A CN201610821162A CN106439502A CN 106439502 A CN106439502 A CN 106439502A CN 201610821162 A CN201610821162 A CN 201610821162A CN 106439502 A CN106439502 A CN 106439502A
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- fixing bolt
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- ert
- standpipe
- slug flow
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D5/00—Protection or supervision of installations
- F17D5/02—Preventing, monitoring, or locating loss
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F17—STORING OR DISTRIBUTING GASES OR LIQUIDS
- F17D—PIPE-LINE SYSTEMS; PIPE-LINES
- F17D1/00—Pipe-line systems
- F17D1/005—Pipe-line systems for a two-phase gas-liquid flow
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Measuring Fluid Pressure (AREA)
- Pipeline Systems (AREA)
Abstract
The invention relates to a vertical pipe interior slug flow online monitoring device and an elimination method. Length-adjustable ERT sensors are designed and are closely attached to a vertical pipe wall to guarantee imaging accuracy. The ERT sensors are uniformly distributed on a vertical pipe outer wall at the same central angle to obtain slug flow real-time images through combination with a certain image restoration algorithm so as to realize vertical pipe interior slug flow online monitoring. Fixing ring clamping structures and compaction structures of the ERT sensors are designed so as to satisfy high-pressure and low-temperature environmental conditions of oceans. Obtained data are transmitted to an offshore production platform central control room through a data transmission system to provide data supporting for movement adjustment of tail end production separator valves through combination with the slug flow elimination method.
Description
Technical field
The present invention relates to slug flow on-Line Monitor Device and removing method in a kind of standpipe, belong to ocean gathering-transferring technology neck
Domain.
Background technology
In marine oil and gas recovery process, using standpipe, seabed mixed transporting tube line is connected with maritime center processing platform, standpipe
It is also easy to produce slug flow, conveying risk is big in system.
Slug flow is increased dramatically standpipe internal drop, leads to wellhead back pressure to increase, Oil/gas Well yield reduction.At stand-pipe output
Air-liquid replaces outflow, causes downstream production separator overflow or cutout.Pressure big ups and downs aggravate standpipe wall erosion, cause pipe
Road shakes, and on processing platform, supercharging equipment cavitates.Produce temperature drop effect during gas eruption, lead to wall wax deposition and water
Compound is formed.
On open source literature, foreign study person does not propose slug flow on-Line Monitor Device design in related standpipe, domestic grinds
The person of studying carefully mostly rests on theoretical research stage, the report of not related tangibility achievement in research.
In standpipe, slug flow removing method mainly has：(1) riser bottom gas injection, in reduction standpipe, gas-liquid mixed post is quiet
Pressure, strengthens gas fluid-carrying capability.(2) adopt seabed gas-liquid production separator.(3) multiphase pump is utilized to increase on seabed or platform
Pressure.(4) riser top throttling.(5) increase back pressure.The enforcement of said method, does not carry out slug flow on-line monitoring in standpipe, lacks
The related data of slug flow supports, and slug flow eradicating efficacy is limited.
Therefore, slug flow on-Line Monitor Device in design standpipe, research is based on slug flow on-Line Monitor Device work(in standpipe
The slug flow removing method of energy, the safe operation tool for guarantee riser systems, oil vapor treatment equipment is of great significance.
Content of the invention
It is an object of the invention to provide a kind of slug flow on-Line Monitor Device, realize the visualization survey of slug flow in standpipe
Amount is it is ensured that the defeated pipeline robust of maxine atlas runs.
Present invention mainly solves following problem：
(1) design setting spring in ERT sensor, sensor, realize sensor and freely stretch, fit tightly outside standpipe
Wall；
(2) clamping structure of design sensor retainer ring, compressing structure, compressing structure adopts rustless steel A2-70 material system
Standby, have resilient clamping structure and adopt polytetrafluoroethylmaterial material to prepare, to meet the environmental condition of oceanic high low temperature；
(3) ERT sensor is distributed in pipeline outer wall in identical central angle, draws slug flow in conjunction with certain image restoring algorithm
Real time imaging, realizes slug flow on-line monitoring in standpipe；
(4) the slug flow removing method based on slug flow on-Line Monitor Device function in standpipe, adjustment end produces and separates
Device valve event, realizes the elimination of slug flow.
To achieve these goals, technical scheme is as follows.
Slug flow on-Line Monitor Device and removing method in a kind of standpipe it is characterised in that：Including an ERT sensor
11st, the 2nd ERT sensor 12, the 3rd ERT sensor 13, the 4th ERT sensor 14, the 5th ERT sensor 15, the 6th ERT passes
Sensor 16, the first fixing bolt 211, the second fixing bolt 212, the 3rd fixing bolt 221, the 4th fixing bolt the 222, the 5th are solid
Determine bolt 231, the 6th fixing bolt 232, the 7th fixing bolt 241, the 8th fixing bolt 242, the 9th fixing bolt 251,
Ten fixing bolts 252, the 11st fixing bolt 261, the 12nd fixing bolt 262, sensor retainer ring 3, standing tube outer wall 4, vertical
Inside pipe wall 5.
Described sensor retainer ring 3 by an ERT sensor 11, the 2nd ERT sensor 12, the 3rd ERT sensor 13,
Four ERT sensors 14, the 5th ERT sensor 15, the 6th ERT sensor 16 are uniformly fixed on standing tube outer wall 4 in identical central angle,
Described first fixing bolt 211, the second fixing bolt 212 insert described sensor retainer ring 3, the described ERT sensing of fixation
Device 11, described 3rd fixing bolt 221, the 4th fixing bolt 222 insert described sensor retainer ring 3, fixing described 2nd ERT
Sensor 12, described 5th fixing bolt 231, the 6th fixing bolt 232 insert described sensor retainer ring 3, fixation described the
Three ERT sensors 13, described 7th fixing bolt 241, the 8th fixing bolt 242 insert described sensor retainer ring 3, fixing institute
State the 4th ERT sensor 14, described 9th fixing bolt 251, the tenth fixing bolt 252 insert described sensor retainer ring 3, Gu
Fixed described 5th ERT sensor 15, it is solid that described 11st fixing bolt 261, the 12nd fixing bolt 262 insert described sensor
Determine ring 3, fixing described 6th ERT sensor 16, described standing tube outer wall 4 and standpipe inwall 5 keep concentric.
Further, a described ERT sensor 11, the 2nd ERT sensor 12, the 3rd ERT sensor 13, the 4th ERT
Sensor 14, the 5th ERT sensor 15, the 6th ERT sensor 16 is same model specification.
Further, described first fixing bolt 211, the second fixing bolt 212, the 3rd fixing bolt the 221, the 4th are fixing
Bolt 222, the 5th fixing bolt 231, the 6th fixing bolt 232, the 7th fixing bolt 241, the 8th fixing bolt the 242, the 9th
Fixing bolt 251, the tenth fixing bolt 252, the 11st fixing bolt 261, the 12nd fixing bolt 262 are advised for same model
Lattice, the fixed form in described sensor retainer ring 3 is identical.
Further, base 101 is connected by a described ERT sensor 11 inner spring 102 with sensor patch 103, institute
State spring 102 and pressure is applied to sensor patch 103.
Further, it is compressing structure 234 between described 5th fixing bolt 231, the 6th fixing bolt 232, there is bullet
Property clamping structure 235, compressing structure 234, the resilient clamping structure 235 of tool form installation passage, by the 3rd ERT sensor
13 is fixing.
Further, the installation passage that described compressing structure 234, the resilient clamping structure 235 of tool are formed and described the
Three ERT sensor 13 diameter is identical.
Further, described compressing structure 234 adopts rustless steel A2-70 material to prepare, and has resilient clamping structure 235
Using polytetrafluoroethylmaterial material preparation.
Slug flow on-Line Monitor Device in described standpipe, further includes the slug flow elimination side that said apparatus adopt
Method：
a：Existed based on the first slug flow on-Line Monitor Device 19, the second slug flow on-Line Monitor Device 20, the 3rd slug flow
Fluid image in the standpipe that line monitoring device 21 provides, when determining newly formed slug flow by standpipe 30 base pressure sensor 18
Pressure threshold P1；
b：Pressure transducer 18 measures standpipe 30 base pressure value P2More than pressure threshold P1When, increase the first valve 28 and open
Degree, in standpipe 30, gas phase flow velocity increases, and slug flow flow pattern changes, and reaches the purpose eliminating slug flow, pressure transducer 18
Measurement standpipe 30 base pressure value P2Less than pressure threshold P1When, no slug flow produces, and reduces the first valve 28 aperture；
c：According to above-mentioned steps a, b, the first valve 28 aperture size is by pressure threshold P1And first pressure sensor 18 surveys
Obtain standpipe 30 base pressure value P2Determine；
d：It is provided with first liquid level gauge 31, second liquid level gauge 32, liquid level is higher than first liquid level gauge 31 institute in production separator 29
When position, increase the second valve 37 aperture, when liquid level is less than second liquid level gauge 32 position, close the second valve 37, directly
Again increase to second liquid level gauge 32 position to liquid level, open the second valve 37；
e：When no slug flow is formed in standpipe 30, gas phase pressure in production separator 29 is measured by second pressure sensor 24
Power, by data feedback to second controller 23, is controlled to the first valve 28 aperture, adjusts pressure in production separator 29；
f：When slug flow in standpipe 30, second controller 23 lost efficacy, and received standpipe 30 bottom by the first controller 25
Portion's pressure information, is controlled to the first valve 28 aperture, and the first controller 25 is PID controller.
This beneficial effect of the invention is：
(1) riser bottom, middle part, top are provided with slug flow on-Line Monitor Device, realize flow pattern at standpipe key point real-time
Monitoring, and generate oil gas water three phase distributed image in pipe；
(2) by high pressure resistant, low temperature resistant sensor retainer ring, sensor is fixed in identical central angle ring-type, be that ocean is disliked
The normal work of bad condition lower sensor provides safeguard；
(3) pass through standpipe in slug flow on-Line Monitor Device for end production separator valve event adjust provide image and
Data supporting, in conjunction with slug flow removing method, realizes the elimination of slug flow.
Brief description
Fig. 1 is slug flow on-Line Monitor Device scheme of installation in the embodiment of the present invention.
Fig. 2 is slug flow on-line monitoring schematic diagram in the embodiment of the present invention.
Fig. 3 is slug flow on-Line Monitor Device schematic diagram in the embodiment of the present invention.
Fig. 4 is ERT sensor schematic in the embodiment of the present invention.
Fig. 5 is sensor retainer ring partial schematic diagram in the embodiment of the present invention.
Fig. 6 is that in the embodiment of the present invention, slug flow eliminates system schematic.
Fig. 7 is that in the embodiment of the present invention, slug flow forms cycle schematic diagram.
Fig. 8 is embodiment of the present invention neutral tube base pressure with valve opening change schematic diagram.
Specific embodiment
Below in conjunction with the accompanying drawings the specific embodiment of the present invention is described, to be better understood from the present invention.
Embodiment
In the present embodiment, slug flow on-Line Monitor Device is arranged on riser bottom, middle part, top, as shown in Figure 1.By storing up
Layer 1, reservoir 2, the oil gas water three phase of reservoir 3 extraction, through seabed gathering line and standpipe, enter offshore platform and are processed, slug
Stream on-Line Monitor Device can be moved freely by actuating device on standpipe, variations in flow patterns in real-time monitoring standpipe.
Slug flow on-line monitoring principle is as shown in Figure 2.6 ERT probes are distributed in pipeline outer wall, every time in identical central angle
During measurement, a probe is active, and remaining 5 probe is in unactivated state.First stage, to the first activation probe
Apply 5V voltage and run through whole tube wall system, measure state of activation probe to the voltage drop U of unactivated state probem, survey simultaneously
Go out the current current value i of unactivated state probem, therefore, according to Ohm's law, state of activation probe can be measured to un-activation
The resistance r of state probesm, resistivity Gm：
Second stage, another probe (the second activation probe for example shown in figure) is active, and remaining probe is in
Unactivated state, after 6 activation, all there is a state of activation in each probe, depicts the complete pipeline section electricity of a width
Resistance rate grid, subscript m refers to the signal (being 5 signals under the conditions of 6 probes) of one-shot measurement process reception, carries out altogether at 30 signals
Reason (6 × 5=30), increases with number of probes, and image accuracy increases, and meanwhile, computation burden increases, the delay of real time imaging
Degree increases.
In standpipe, slug flow on-Line Monitor Device is as shown in Figure 3.Including an ERT sensor 11, the 2nd ERT sensor
12nd, the 3rd ERT sensor 13, the 4th ERT sensor 14, the 5th ERT sensor 15, the 6th ERT sensor the 16, first fixing spiral shell
Bolt 211, the second fixing bolt 212, the 3rd fixing bolt 221, the 4th fixing bolt 222, the 5th fixing bolt the 231, the 6th are solid
Determine bolt 232, the 7th fixing bolt 241, the 8th fixing bolt 242, the 9th fixing bolt 251, the tenth fixing bolt 252,
11 fixing bolts 261, the 12nd fixing bolt 262, sensor retainer ring 3, standing tube outer wall 4, standpipe inwall 5.
Described sensor retainer ring 3 by an ERT sensor 11, the 2nd ERT sensor 12, the 3rd ERT sensor 13,
Four ERT sensors 14, the 5th ERT sensor 15, the 6th ERT sensor 16 are uniformly fixed on standing tube outer wall 4 in identical central angle,
Described first fixing bolt 211, the second fixing bolt 212 insert described sensor retainer ring 3, the described ERT sensing of fixation
Device 11, described 3rd fixing bolt 221, the 4th fixing bolt 222 insert described sensor retainer ring 3, fixing described 2nd ERT
Sensor 12, described 5th fixing bolt 231, the 6th fixing bolt 232 insert described sensor retainer ring 3, fixation described the
Three ERT sensors 13, described 7th fixing bolt 241, the 8th fixing bolt 242 insert described sensor retainer ring 3, fixing institute
State the 4th ERT sensor 14, described 9th fixing bolt 251, the tenth fixing bolt 252 insert described sensor retainer ring 3, Gu
Fixed described 5th ERT sensor 15, it is solid that described 11st fixing bolt 261, the 12nd fixing bolt 262 insert described sensor
Determine ring 3, fixing described 6th ERT sensor 16, described standing tube outer wall 4 and standpipe inwall 5 keep concentric.
A described ERT sensor 11, the 2nd ERT sensor 12, the 3rd ERT sensor 13, the 4th ERT sensor 14,
5th ERT sensor 15, the 6th ERT sensor 16 is same model specification.
Described first fixing bolt 211, the second fixing bolt 212, the 3rd fixing bolt 221, the 4th fixing bolt 222,
5th fixing bolt 231, the 6th fixing bolt 232, the 7th fixing bolt 241, the 8th fixing bolt 242, the 9th fixing bolt
251st, the tenth fixing bolt 252, the 11st fixing bolt 261, the 12nd fixing bolt 262 are same model specification, described
Sensor retainer ring 3 methods of internal fixation is identical.
ERT sensor is as shown in Figure 4.Base 101 is connected by spring 102 with sensor patch 103, and described spring 102 is right
Sensor patch 103 applies pressure it is ensured that ERT sensor and standing tube outer wall fit tightly, in order to reach more preferable imaging effect,
ERT probe need to be carried out with type selecting, type selecting table is as follows, in order to ensure accuracy and the delay weakening realtime imaging of imaging,
From the ERT sensor with conductor loop.
Sensor retainer ring Local map is as shown in Figure 5.Between described 5th fixing bolt 231, the 6th fixing bolt 232 it is
Compressing structure 234, the resilient clamping structure 235 of tool, compressing structure 234, the resilient clamping structure 235 of tool form to install and lead to
Road, the 3rd ERT sensor 13 is fixing.
The installation passage that described compressing structure 234, the resilient clamping structure 235 of tool are formed and described 3rd ERT sensing
Device 13 diameter is identical.Described compressing structure 234 adopts rustless steel A2-70 material to prepare, and has resilient clamping structure 235 and adopts
Prepared by polytetrafluoroethylmaterial material.
It is as shown in Figure 6 that slug flow eliminates system.The slug flow removing method that system adopts is as follows, a：Based on the first slug flow
In the standpipe that on-Line Monitor Device 19, the second slug flow on-Line Monitor Device 20, the 3rd slug flow on-Line Monitor Device 21 provide
Fluid image, determines pressure threshold P during newly formed slug flow by standpipe 30 base pressure sensor 181；b：Pressure sensing
Device 18 measures standpipe 30 base pressure value P2More than pressure threshold P1When, increase the first valve 28 aperture, make gas phase stream in standpipe 30
Speed increases, and slug flow flow pattern changes, and reaches the purpose eliminating slug flow, and pressure transducer 18 measures standpipe 30 base pressure
Value P2Less than pressure threshold P1When, no slug flow produces, and reduces the first valve 28 aperture；c：According to above-mentioned steps a, b, the first valve
Door 28 aperture sizes are by pressure threshold P1And first pressure sensor 18 records standpipe 30 base pressure value P2Determine；d：Produce and divide
It is provided with first liquid level gauge 31, second liquid level gauge 32 in device 29, when liquid level is higher than first liquid level gauge 31 position, increase second
Valve 37 aperture, when liquid level is less than second liquid level gauge 32 position, closes the second valve 37, until liquid level increases to the again
Two liquidometer 32 position, opens the second valve 37；e：When in standpipe 30, no slug flow is formed, by second pressure sensor
24 measure gaseous pressure in production separator 29, by data feedback to second controller 23, the first valve 28 aperture are controlled
System, adjusts pressure in production separator 29；f：When slug flow in standpipe 30, second controller 23 lost efficacy, and controlled by first
Device 25 processed receives standpipe 30 base pressure information, and the first valve 28 aperture is controlled, and the first controller 25 is PID control
Device, 17 is seabed gathering production pipeline, and for transporting oil gas water three phase, end and standpipe 30 connect, and 22,26,33,34,36 is equal
For control circuit.
It is as shown in Figure 7 that slug flow forms the cycle.t0To t1For liquid blocking and liquid plug build phase, relatively little airflow in standpipe
Under speed, liquid in pipe flows downward, the gas-liquid mixture flowing in riser bottom accumulation, blocking pipeline, so that liquid is swum beyond the Great Wall
Pipeline pressure increase, liquid plug is elongated, only has a small amount of gas-liquid two-phase to flow out at stand-pipe output.t1To t2Increase rank for gas pressure
Section, manifold pressure increases, and liquid continues accumulation simultaneously, and liquid plug increases, and in standpipe, liquid level is gradually increasing, when pipeline pressure is higher than
During standpipe fluid pressure head, liquid starts to flow out from riser top.t2To t3Go out the stage for liquid plug flow, pipeline pressure be enough to lift
In standpipe during fluid column, liquid starts to discharge from riser top, and originally drain age velocity is relatively low, and after gas scurries into standpipe, liquid adds
Speed, in the short time, fluid flow reaches peak flow.t3To t4Discharge the stage for gas in standpipe, liquid swims the gas of accumulation beyond the Great Wall
Be exceedingly fast discharge standpipe, and after entering the reception device of platform, in standpipe, gas flow rate reduces, and pipeline pressure declines, and starts a new round
Circulation.
Riser bottom pressure is with valve opening change as shown in Figure 8.First valve 28 aperture is adjusted, by first
Slug flow on-Line Monitor Device 19, the second slug flow on-Line Monitor Device 20, the 3rd slug flow on-Line Monitor Device 21 provide vertical
Flow pattern image in pipe, when standpipe 30 bottom just slug flow, records now standpipe 30 bottom by first pressure sensor 18
Pressure threshold P1, standpipe 30 bottom first pressure sensor 18 records pressure value P2More than pressure threshold P1When, increase by the first valve
28 apertures, increase gas phase flow velocity, eliminate slug flow in standpipe 30, make pressure level-off in standpipe 30.
The above is the preferred embodiment of the present invention it is noted that for those skilled in the art
For, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications are also considered as
Protection scope of the present invention.
Claims (8)
1. in a kind of standpipe slug flow on-Line Monitor Device it is characterised in that：Pass including an ERT sensor (11), the 2nd ERT
Sensor (12), the 3rd ERT sensor (13), the 4th ERT sensor (14), the 5th ERT sensor (15), the 6th ERT sensor
(16), the first fixing bolt (211), the second fixing bolt (212), the 3rd fixing bolt (221), the 4th fixing bolt (222),
5th fixing bolt (231), the 6th fixing bolt (232), the 7th fixing bolt (241), the 8th fixing bolt (242), the 9th
Fixing bolt (251), the tenth fixing bolt (252), the 11st fixing bolt (261), the 12nd fixing bolt (262), sensing
Device retainer ring (3), standing tube outer wall (4), standpipe inwall (5)；
Described sensor retainer ring (3) is by an ERT sensor (11), the 2nd ERT sensor (12), the 3rd ERT sensor
(13), the 4th ERT sensor (14), the 5th ERT sensor (15), the 6th ERT sensor (16) are in that identical central angle is uniformly solid
Due to standing tube outer wall (4), described first fixing bolt (211), the second fixing bolt (212) insert described sensor retainer ring
(3), a fixing described ERT sensor (11), described 3rd fixing bolt (221), the 4th fixing bolt (222) insertion are described
Sensor retainer ring (3), fixing described 2nd ERT sensor (12), described 5th fixing bolt (231), the 6th fixing bolt
(232) insert described sensor retainer ring (3), fixing described 3rd ERT sensor (13), described 7th fixing bolt (241),
8th fixing bolt (242) inserts described sensor retainer ring (3), fixing described 4th ERT sensor (14), and the described 9th is solid
Determine bolt (251), the tenth fixing bolt (252) inserts described sensor retainer ring (3), fixing described 5th ERT sensor
(15), described 11st fixing bolt (261), the 12nd fixing bolt (262) insert described sensor retainer ring (3), fixing
Described 6th ERT sensor (16), described standing tube outer wall (4) and standpipe inwall (5) keep concentric.
2. in standpipe according to claim 1 slug flow on-Line Monitor Device it is characterised in that：A described ERT sensing
Device (11), the 2nd ERT sensor (12), the 3rd ERT sensor (13), the 4th ERT sensor (14), the 5th ERT sensor
(15), the 6th ERT sensor (16) is same model specification.
3. in standpipe according to claim 1 slug flow on-Line Monitor Device it is characterised in that：Described first fixing bolt
(211), the second fixing bolt (212), the 3rd fixing bolt (221), the 4th fixing bolt (222), the 5th fixing bolt
(231), the 6th fixing bolt (232), the 7th fixing bolt (241), the 8th fixing bolt (242), the 9th fixing bolt
(251), the tenth fixing bolt (252), the 11st fixing bolt (261), the 12nd fixing bolt (262) are advised for same model
Lattice, the fixed form in described sensor retainer ring (3) is identical.
4. in standpipe according to claim 1 slug flow on-Line Monitor Device it is characterised in that：A described ERT sensing
Base (101) is connected by device (11) inner spring (102) with sensor patch (103), and described spring (102) is to sensor patch
(103) apply pressure.
5. in standpipe according to claim 1 slug flow on-Line Monitor Device it is characterised in that：Described 5th fixing bolt
(231) it is, compressing structure (234) between the 6th fixing bolt (232), have resilient clamping structure (235), compressing structure
(234), have resilient clamping structure (235) and form installation passage, the 3rd ERT sensor (13) is fixing.
6. in standpipe according to claim 5 slug flow on-Line Monitor Device it is characterised in that：Described compressing structure
(234) installation passage that, the resilient clamping structure of tool (235) is formed is identical with described 3rd ERT sensor (13) diameter.
7. in standpipe according to claim 5 slug flow on-Line Monitor Device it is characterised in that：Described compressing structure
(234) adopt rustless steel A2-70 material to prepare, have resilient clamping structure (235) and adopt polytetrafluoroethylmaterial material to prepare.
8. in standpipe according to claim 1 slug flow on-Line Monitor Device it is characterised in that：The section that said apparatus adopt
Plug flow removing method：
a：Existed based on the first slug flow on-Line Monitor Device (19), the second slug flow on-Line Monitor Device (20), the 3rd slug flow
Fluid image in the standpipe that line monitoring device (21) provides, determines newly formed section by standpipe (30) base pressure sensor (18)
Pressure threshold P during plug flow1；
b：Pressure transducer (18) measures standpipe (30) base pressure value P2More than pressure threshold P1When, increase the first valve (28)
Aperture, pressure transducer (18) measures standpipe (30) base pressure value P2Less than pressure threshold P1When, reduce the first valve (28) and open
Degree；
c：According to above-mentioned steps a, b, the first valve (28) aperture size is by pressure threshold P1And first pressure sensor (18) records
Standpipe (30) base pressure value P2Determine；
d：It is provided with first liquid level gauge (31), second liquid level gauge (32), liquid level is higher than first liquid level gauge in production separator (29)
(31) during position, increase the second valve (37) aperture, when liquid level is less than second liquid level gauge (32) position, close second
Valve (37), until liquid level increases to second liquid level gauge (32) position again, opens the second valve (37)；
e：When no slug flow is formed in standpipe (30), the interior gas phase of production separator (29) is measured by second pressure sensor (24)
Pressure, by data feedback to second controller (23), is controlled to the first valve (28) aperture, adjusts production separator (29)
Interior pressure；
f：When slug flow in standpipe (30), second controller (23) lost efficacy, and received standpipe by the first controller (25)
(30) base pressure information, is controlled to the first valve (28) aperture, and the first controller (25) is PID controller.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610821162.0A CN106439502B (en) | 2016-09-14 | 2016-09-14 | Slug flow on-Line Monitor Device and removing method in a kind of standpipe |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610821162.0A CN106439502B (en) | 2016-09-14 | 2016-09-14 | Slug flow on-Line Monitor Device and removing method in a kind of standpipe |
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| CN108071368A (en) * | 2018-01-16 | 2018-05-25 | 孙加亮 | A kind of efficient extraction natural-gas energy-saving equipment |
| CN111706790A (en) * | 2020-06-04 | 2020-09-25 | 杨玉伟 | Oil pipeline high accuracy oil impregnate detection device based on electromagnetic pulse |
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