CN1632369A - Separator and phase-split conveying method for eliminating plug flow on serious segments by utilizing same - Google Patents
Separator and phase-split conveying method for eliminating plug flow on serious segments by utilizing same Download PDFInfo
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- CN1632369A CN1632369A CN 200410073492 CN200410073492A CN1632369A CN 1632369 A CN1632369 A CN 1632369A CN 200410073492 CN200410073492 CN 200410073492 CN 200410073492 A CN200410073492 A CN 200410073492A CN 1632369 A CN1632369 A CN 1632369A
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Abstract
Separator and phase-split conveying method for eliminating plug flow on serious segments by utilizing same. The separator includes housing, collecting pipe and escape pipe connecting to the housing. The housing sets liquid level sensor and pressure sensor and has rising pipe which extends to the bottom of the housing. The extending part of the rising pipe sets the liquid phase pump connecting to the rising pipe by valve. The control valve is installed on the gas rising pipe closed the housing outlet. The inventive separator is installed at the connection section of the gas-liquid mixed transportation pipe and rising pipe and regulates the opening size of the control valve by controlling the liquid level signal and pressure signal to stabilize the liquid level and pressure. The liquid enters into rising pipe after the separation of the gas-liquid in the separator. The gas enters into the rising pipe through control valve and escape pipe. The liquid is mixed in the rising pipe and flows to the shore platform. The invention accurately controls the gas-liquid flow and eliminates the plug flow on serious segments.
Description
Technical field
The present invention relates to a kind of separator and utilize its method of eliminating serious slug flow, relate in particular to a kind of separator of oil and gas multiphase flow and utilize its seabed of eliminating the oil and gas multiphase flow serious slug flow to separate the phase-splitting delivery method.
Background technique
In marine petroleum exploitation, often run into the situation that gas-liquid is carried simultaneously, when the heterogeneous collector and delivery pipe road in seabed arrives ocean platform or on the bank during treatment facility, need be connected with asending pipe, harmful flow pattern of serious slug flow can appear being called in the system that collector and delivery pipe road and asending pipe are formed under certain condition.This flow pattern can produce the liquid plug of several times asending pipe height, cause pressure cycle variation in the collector and delivery pipe road, thereby influence well head pressure, asending pipe outlet gas-liquid intermittent flow is gone out, make gas ejection at a high speed at short notice, cause outlet liquid plug to enter separator at a high speed, the serious slug flow phenomenon brings many problems for design and production.Because must strengthen the production facility scale, the rated capacity of some separators causes waste much larger than the actual liquid Processing capacity, mobile big ups and downs also cause the control difficulty of separator and downstream facility, sometimes even can cause to produce and interrupt.
Chinese patent CN1387617A " suppressing and be controlled at the method and system of the slug flow in the heterogeneous fluid stream " (the open date: on December 25th, 2002) and U.S. Pat 6390114B1 " Method andapparatus for suppressing and controlling slug flow in a multi-phase fluid stream " (the open date: on May 21st, 2002) announced a kind of serious slug flow method of inhibitioning, this method adopts the single-phase flow measurement of gas-liquid of easy realization and realizes control to serious slug flow in conjunction with a plurality of controlled variable such as liquid level and pressure; B. P. GB2374161A " Gas injection controlling liquid slugs inpipeline riser " (the open date: on October 9th, 2002) announced a kind of serious slug flow controlling method in asending pipe bottom gas injection, but experiment shows that the very big gas injection rate of this method needs could eliminate serious slug flow fully, hour only can weaken serious slug flow at gas injection rate.Said method just reaches the effect that weakens serious slug flow, does not all fundamentally eliminate the generation condition of serious slug flow.
Summary of the invention
In order to eliminate the serious slug flow phenomenon, the purpose of this invention is to provide a kind of separator, utilize this separator, can accurately control the mobile of gas-liquid easily, reach the purpose of eliminating serious slug flow.
Another object of the present invention provides a kind of phase-splitting delivery method of eliminating serious slug flow.
The technical solution adopted in the present invention is: a kind of separator, comprise housing, be connected with incoming flow pipe and vapor riser on the housing, liquid level sensor and pressure transducer are set on the housing, asending pipe inserts in the housing and reaches housing bottom, the part that asending pipe stretches out housing is provided with valve 8, and valve 8 constitutes bypass by valve 9 and valve 10 with liquid phase pump at the place, two ends of asending pipe, near the housing outlet port control valve is set on the vapor riser.
Another technological scheme of the present invention is: a kind of phase-splitting delivery method of eliminating serious slug flow, separator is installed in connecting part at mixed transportation pipeline and asending pipe, mixed transportation pipeline is communicated with the incoming flow pipe of separator, gas-liquid fluid in the mixed transportation pipeline enters the housing of separator through incoming flow pipe, the aperture that liquid level signal that spreads out of with liquid level sensor and pressure transducer and pressure signal come adjusting control valve, make liquid level and pressure stability, after gas-liquid is separated in separator, liquid is entered stretch into the asending pipe of separator bottom, through the pressurized delivered of liquid phase pump stage apparatus ashore, make gas enter stage apparatus on the bank by vapor riser through control valve.
The preferable technological scheme of the present invention can adopt the separator of tangential centrifugation, and its volume is 2～4 times of asending pipe volume, and slenderness ratio is 2.
The invention has the beneficial effects as follows: separator of the present invention, simple in structure, can accurately control the mobile of gas-liquid easily, reach the purpose of eliminating serious slug flow; Utilize separator of the present invention to eliminate the phase-splitting delivery method of serious slug flow, be that joint location at mixed transporting tube road and asending pipe installs before and after the blocking-up synergistic separator additional and cooperates automatic control technology, by control to the separator liquid level, realize gas-liquid separation and conveying respectively, thereby liquid also can reduce pipeline pressure by the liquid phase pump driving simultaneously.This method has fundamentally been eliminated the generation of serious slug flow, and incoming flow is stratified flow substantially, so liquid level is controlled easily, can obtain the steady flow of gas-liquid, on the liquid asending pipe, install liquid phase pump additional in addition pressure head is provided, flow and can switch by valve, the flow of pump can be controlled by liquid level signal by variable-frequency control technique, thereby guarantees separator liquid level and pressure stability.The very ripe liquid phase pump transportation scheme of this utilization can reduce the inlet pressure on collector and delivery pipe road greatly, and the lower oil reservoir of later stage energy is more favourable for producing.
Description of drawings
Fig. 1 is Liquid Flow of the present invention and control system schematic representation;
Fig. 2 is that system is realizing that separating (adjusting control valve door 6) changes with the liquid holdup that stops to separate in the asending pipe of (closing control valve 6) front and back, and abscissa is the time among the figure, and y coordinate is a liquid holdup;
Fig. 3 is that system separates conveying and stops to separate therefore asending pipe mixing conveying in realization, and the signal of the pairing separator pressure sensor in front and back changes, and abscissa is the time among the figure, and y coordinate is an absolute pressure.
Among the figure, 1 incoming flow pipe, 2 housings, 3 asending pipes, 4 vapor risers, 5 liquid level sensors, 6 control valves, 7 pressure transducers, 8 valves, 9 valves, 10 valves, 11 liquid phase pumps, 12 mixed transportation pipelines.
Embodiment
Below in conjunction with accompanying drawing the present invention is described in further detail.
Referring to Fig. 1, separator comprises housing 2, be connected with incoming flow pipe 1 and vapor riser 4 on the housing 2, liquid level sensor 5 and pressure transducer 7 are set on the housing 2, asending pipe 3 inserts in the housing 2 and reaches housing 2 bottoms, the part that asending pipe 3 stretches out housing 2 is provided with valve 8, and valve 8 constitutes bypass by valve 9 and valve 10 with liquid phase pump 11 at the place, two ends of asending pipe 3, near housing 2 outlet ports control valve 6 is set on the vapor riser 4.
Eliminate the phase-splitting delivery method of serious slug flow, in the connecting part of mixed transportation pipeline 12 and asending pipe 3 separator is installed, separator adopts tangential centrifugation, and its volume is 2～4 times of asending pipe 3 volumes, and slenderness ratio is 2.Mixed transportation pipeline 12 is communicated with the incoming flow pipe 1 of separator, gas-liquid fluid in the mixed transportation pipeline 12 enters the housing 2 of separator through incoming flow pipe 1, the aperture that liquid level signal that spreads out of with liquid level sensor 5 and pressure transducer 7 and pressure signal come adjusting control valve 6, make liquid level and pressure stability, after gas-liquid is separated in separator, liquid is entered stretch into the asending pipe 3 of separator bottom, through the pressurized delivered of liquid phase pump 11 stage apparatus ashore, liquid flow through valve 8,9,10 switch, it is throttle down 8, Open valve 9 and 10, liquid also can directly flow out through valve 8 without liquid phase pump, be that valve 8 is opened, valve 9 and 10 is closed, and makes gas enter stage apparatus on the bank through control valve 6 by vapor riser 4.
Under the lower situation of flow velocity, separator pressure approximates the heavy position of the liquid phase pressure head sum of asending pipe 3 outlet back pressures and asending pipe 3 height greatly, can accept for this pressure of more shallow marine site, and for oil district, at present increasing deep-sea, this overpressure, can cause negative effect to oil well, therefore installing liquid phase pump 11 additional on asending pipe 3 provides pressure head just can address this problem well, flowing of liquid can be passed through valve 8,9,10 switch, the flow of pump can be controlled by liquid level signal 5 by variable-frequency control technique, thereby guarantees separator liquid level and pressure stability.
Fig. 2 is the experiment comparison diagram, and wherein valve 8 is opened, and valve 9 and 10 is closed.Adjusting control valve 6 keeps gas-liquid to separate fully when beginning to test, and can see that asending pipe 3 liquid holdups are 1, the expression full packages; Closed control valve 6 in the time of the 195th second, gas-liquid is flowed out by asending pipe 3, can see occurring serious slug flow in the system very soon, the liquid holdup big ups and downs of asending pipe 3, full up when pipeline 12 is had in vain sometimes entirely, outlet gas-liquid intermittent flow.
Among Fig. 3, valve 8 is opened, and valve 9 and 10 is closed.Adjusting control valve 6 keeps gas-liquid to separate fully when beginning to test, asending pipe 3 liquid holdups are 1, the expression full packages, the pressure of separator is also constant always: closed control valve 6 in the time of the 195th second, and gas-liquid is flowed out by asending pipe 3, occurs serious slug flow in the system very soon, the also cyclically-varying of the pressure signal of separator, amplitude is up to 1.4bar, and this moment, upstream and downstream production facility working state all was difficult to stablize, and is very unfavorable to ordinary production.
Find out relatively that from above experimental result the present invention can eliminate the serious slug flow phenomenon well.
Claims (3)
1. separator, comprise housing (2), be connected with incoming flow pipe (1) and vapor riser (4) on the housing (2), it is characterized in that, liquid level sensor (5) and pressure transducer (7) are set on the said housing (2), asending pipe (3) inserts in the housing (2) and reaches housing (2) bottom, the part that said asending pipe (3) stretches out housing (2) is provided with valve (8), valve (8) constitutes bypass by valve (9) and valve (10) with liquid phase pump (11) at the place, two ends of asending pipe (3), and said vapor riser (4) is gone up near housing (2) outlet port control valve (6) is set.
2. phase-splitting delivery method of eliminating serious slug flow, it is characterized in that, separator is installed in connecting part at mixed transportation pipeline (12) and asending pipe (3), mixed transportation pipeline (12) is communicated with the incoming flow pipe (1) of separator, gas-liquid fluid in the mixed transportation pipeline (12) enters the housing (2) of separator through incoming flow pipe (1), the aperture that liquid level signal that spreads out of with liquid level sensor (5) and pressure transducer (7) and pressure signal come adjusting control valve (6), make liquid level and pressure stability, after gas-liquid is separated in separator, liquid is entered stretch into the asending pipe (3) of separator bottom, through the pressurized delivered of liquid phase pump (11) stage apparatus ashore, make gas enter stage apparatus on the bank by vapor riser (4) through control valve (6).
3. a kind of phase-splitting delivery method of eliminating serious slug flow according to claim 2 is characterized in that said separator adopts tangential centrifugation, and its volume is 2～4 times of asending pipe (3) volume, and slenderness ratio is 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100734923A CN1297778C (en) | 2004-12-27 | 2004-12-27 | Separator and phase-split conveying method for eliminating plug flow on serious segments by utilizing same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2004100734923A CN1297778C (en) | 2004-12-27 | 2004-12-27 | Separator and phase-split conveying method for eliminating plug flow on serious segments by utilizing same |
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| CN1632369A true CN1632369A (en) | 2005-06-29 |
| CN1297778C CN1297778C (en) | 2007-01-31 |
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| CNB2004100734923A Expired - Fee Related CN1297778C (en) | 2004-12-27 | 2004-12-27 | Separator and phase-split conveying method for eliminating plug flow on serious segments by utilizing same |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102124183A (en) * | 2008-08-07 | 2011-07-13 | 阿克海底公司 | Hydrocarbon production system, method for performing clean-up and method for controlling flow |
| CN102182927A (en) * | 2011-03-02 | 2011-09-14 | 中国海洋石油总公司 | Regulation device for eliminating slug flow of gathering and transporting standpipe device |
| CN102337868A (en) * | 2011-07-12 | 2012-02-01 | 兰州理工大学 | Automatic control system and method for offshore production platform |
| CN102345453A (en) * | 2010-07-30 | 2012-02-08 | 诺沃皮尼奥内有限公司 | Subsea machine and methods for separating components of a material stream |
| CN102410391A (en) * | 2011-08-01 | 2012-04-11 | 西安交通大学 | Real-time throttling device and method for eliminating severe slugging of gathering-riser system |
| CN103039342A (en) * | 2012-12-31 | 2013-04-17 | 中国农业科学院农业环境与可持续发展研究所 | Water culture gas and liquid shared pipeline system |
| CN104850158A (en) * | 2015-05-25 | 2015-08-19 | 中国海洋石油总公司 | Liquid level-pressure coordinated control method used for gas-liquid separator |
| CN106322119A (en) * | 2016-09-14 | 2017-01-11 | 西南石油大学 | Accumulated fluid drainage device and control method of gas field gathering and transporting system |
| CN110099868A (en) * | 2016-12-23 | 2019-08-06 | 埃尼股份公司 | For removing the device and method of hydrocarbon from water body |
| CN113413225A (en) * | 2021-05-18 | 2021-09-21 | 李标 | Be used for patient's oral cavity belt cleaning device behind esophagus cancer operation |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS5219254B2 (en) * | 1973-09-19 | 1977-05-26 | ||
| BR9303910A (en) * | 1993-09-27 | 1995-05-30 | Petroleo Brasileiro Sa | Method for eliminating severe intermittency in underwater multiphase flow lines |
| US6076359A (en) * | 1996-11-25 | 2000-06-20 | American Air Liquide Inc. | System and method for controlled delivery of liquified gases |
| GB2341695B (en) * | 1998-09-17 | 2003-02-26 | Petroleo Brasileiro Sa | Device and method for eliminating severe slugging in multiphase-stream flow lines |
| MY123548A (en) * | 1999-11-08 | 2006-05-31 | Shell Int Research | Method and system for suppressing and controlling slug flow in a multi-phase fluid stream |
| FR2822191B1 (en) * | 2001-03-19 | 2003-09-19 | Inst Francais Du Petrole | METHOD AND DEVICE FOR NEUTRALIZING BY CONTROLLED GAS INJECTION, THE FORMATION OF LIQUID CAPS AT THE FOOT OF A RISER CONNECTING TO A POLYPHASIC FLUID CONDUIT |
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2004
- 2004-12-27 CN CNB2004100734923A patent/CN1297778C/en not_active Expired - Fee Related
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102124183A (en) * | 2008-08-07 | 2011-07-13 | 阿克海底公司 | Hydrocarbon production system, method for performing clean-up and method for controlling flow |
| CN102345453A (en) * | 2010-07-30 | 2012-02-08 | 诺沃皮尼奥内有限公司 | Subsea machine and methods for separating components of a material stream |
| CN102345453B (en) * | 2010-07-30 | 2016-01-20 | 诺沃皮尼奥内有限公司 | For separating of subsea machine and the method for flow of material composition |
| CN102182927A (en) * | 2011-03-02 | 2011-09-14 | 中国海洋石油总公司 | Regulation device for eliminating slug flow of gathering and transporting standpipe device |
| CN102337868A (en) * | 2011-07-12 | 2012-02-01 | 兰州理工大学 | Automatic control system and method for offshore production platform |
| CN102410391B (en) * | 2011-08-01 | 2013-07-10 | 西安交通大学 | Real-time throttling device and method for eliminating severe slugging of gathering-riser system |
| CN102410391A (en) * | 2011-08-01 | 2012-04-11 | 西安交通大学 | Real-time throttling device and method for eliminating severe slugging of gathering-riser system |
| CN103039342A (en) * | 2012-12-31 | 2013-04-17 | 中国农业科学院农业环境与可持续发展研究所 | Water culture gas and liquid shared pipeline system |
| CN104850158A (en) * | 2015-05-25 | 2015-08-19 | 中国海洋石油总公司 | Liquid level-pressure coordinated control method used for gas-liquid separator |
| CN104850158B (en) * | 2015-05-25 | 2017-02-01 | 中国海洋石油总公司 | Liquid level-pressure coordinated control method used for gas-liquid separator |
| CN106322119A (en) * | 2016-09-14 | 2017-01-11 | 西南石油大学 | Accumulated fluid drainage device and control method of gas field gathering and transporting system |
| CN106322119B (en) * | 2016-09-14 | 2018-03-30 | 西南石油大学 | Gas field gathering system hydrops discharger and control method |
| CN110099868A (en) * | 2016-12-23 | 2019-08-06 | 埃尼股份公司 | For removing the device and method of hydrocarbon from water body |
| CN113413225A (en) * | 2021-05-18 | 2021-09-21 | 李标 | Be used for patient's oral cavity belt cleaning device behind esophagus cancer operation |
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| CN1297778C (en) | 2007-01-31 |
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Granted publication date: 20070131 Termination date: 20201227 |