CN1632370A - Separator and self-airlifting method for eliminating plug flow on serious segments by utilizing same - Google Patents
Separator and self-airlifting method for eliminating plug flow on serious segments by utilizing same Download PDFInfo
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- CN1632370A CN1632370A CN 200410073493 CN200410073493A CN1632370A CN 1632370 A CN1632370 A CN 1632370A CN 200410073493 CN200410073493 CN 200410073493 CN 200410073493 A CN200410073493 A CN 200410073493A CN 1632370 A CN1632370 A CN 1632370A
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Abstract
Separator and self-airlifting 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 control valve is installed on the escape pipe closed the housing outlet. The escape pipe communicates to the rising pipe outside the housing. 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 from the gaslift 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.
B. P. GB2374161A " Gas injection controlling liquid slugs in pipelineriser " (the open date: on October 9th, 2002), announced a kind of serious slug flow controlling method in asending pipe bottom gas injection, this method need be injected a large amount of gases could eliminate serious slug flow fully, hour only can weaken serious slug flow at gas injection rate, and equipment investment such as the required compressor bank of gas injection and space requirement often limited the application of this method, and sometimes on-the-spot do not possess enough sources of the gas yet.U.S. Pat 5478504 " Method and apparatus for eliminating severe slug in multi-phase flowsubsea lines " (the open date: December 26 nineteen ninety-five) announced that utilizing the following hectare pipe of second asending pipe before Your Majesty's riser to derive gas injects the control that Your Majesty's riser carries out serious slug flow then, this method gives several schemes of utilizing pressure, differential pressure or density to come the control gaseous flow, but hectare pipeline section height is less under this method, flows to be difficult for accurately control.
Summary of the invention
In order to solve the phenomenon of eliminating serious slug flow, 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 provide a kind of eliminate serious slug flow from the gaslift method.
The technical solution adopted in the present invention is: a kind of separator, comprise housing, be connected with incoming flow pipe and steam outlet pipe on the housing, liquid level sensor and pressure transducer are set on the housing, asending pipe inserts housing and reaches housing bottom, near the housing outlet port control valve is set on the steam outlet pipe, steam outlet pipe is communicated with outside housing with asending pipe.
Another technological scheme of the present invention is: a kind of eliminate serious slug flow from the gaslift method, 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, make gas enter asending pipe through control valve by steam outlet pipe, gas-liquid is mixed the back outflow and is entered stage apparatus on the bank in asending pipe.
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.
Distance bottom can also controlling steam outlet pipe and locating separator being communicated with of asending pipe is 3 times of separator height.
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 eliminate serious slug flow from the gaslift method, this method is started with from the genesis mechanism of ocean mixed transportation pipeline ascending tube system serious slug flow, by gas-liquid separator under water is set, eliminate the condition that tipping tube and asending pipe coupling produce serious slug flow, thereby realize eliminating the serious slug flow phenomenon; Gas after the separation injects asending pipe and realizes mixed gas-liquid flow, and liquid holdup reduces system pressure in the pipe thereby reduce, and then can improve oil well output.
Description of drawings
Fig. 1 is Liquid Flow of the present invention and control system figure;
Fig. 2 is realizing that separating the back changes with the liquid holdup that stops to separate in (closing control valve) two states asending pipe from gaslift (opening and the adjusting control valve door), and among the figure, abscissa is the time, and y coordinate is a liquid holdup;
Fig. 3 is realizing that separation obtains steady flow and the pairing separator pressure sensor signal of serious slug flow occurs with stopping to separate, and among the figure, abscissa is the time, and y coordinate is an absolute pressure.
Among the figure, 1 incoming flow pipe, 2 housings, 3 asending pipes, 4 steam outlet pipes, 5 liquid level sensors, 6 control valves, 7 pressure transducers, 8 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 steam outlet pipe 4 on the housing 2, liquid level sensor 5 and pressure transducer 7 are set on the housing 2, asending pipe 3 inserts housing 2 and reaches housing 2 bottoms, near housing 2 outlet ports control valve 6 is set on the steam outlet pipe 4, steam outlet pipe 4 is communicated with outside housing 2 with asending pipe 3.
Eliminate serious slug flow from the gaslift method, separator is installed in connecting part at mixed transportation pipeline 8 and asending pipe 3, separator adopts tangential centrifugation, its volume is 2～4 times of asending pipe volume, slenderness ratio is 2, mixed transportation pipeline 8 is communicated with the incoming flow pipe 1 of separator, gas-liquid fluid in the mixed transportation pipeline 8 enters the housing 2 of separator through incoming flow pipe 1, the aperture that liquid level signal that liquid level sensor 5 and pressure transducer 7 spread out of and pressure signal come adjusting control valve 6, make liquid level and pressure stability, after gas-liquid is separated in separator, liquid enters the asending pipe 3 that stretches into the separator bottom, make gas enter asending pipe 3 through control valve 6 by steam outlet pipe 4, the distance of steam outlet pipe 4 bottom locating separator being communicated with of asending pipe 3 is 3 times of separator height, and gas-liquid is mixed the back outflow and entered stage apparatus on the bank in asending pipe 3.
Referring to Fig. 2, experimental result contrast of the present invention as can be seen, adjusting control valve 6 keeps gas-liquid to separate fully when beginning to test, can see that liquid changes very little and remains on than low value in the liquid holdup of asending pipe 3, this explanation flow quantity of working off one's feeling vent one's spleen is stable, because mixed gas-liquid flow in the asending pipe 3, so heavy position pressure drop is less, therefore system pressure is less, closed control valve 6 after the 260th second, gas-liquid are directly 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, outlet gas-liquid intermittent flow.
Referring to Fig. 3, adjusting control valve 6 keeps gas-liquid to separate fully during beginning, and the pressure in the separator is more constant always, closed control valve 6 after the 260th second, also cyclic fluctuation of pressure in the separator, amplitude is up to 1.4bar (experimental setup asending pipe height is 15.8m only).This moment, upstream and downstream production facility running state all was difficult to stablize, and is very unfavorable to safety in production.
Above experimental result finds out that relatively the present invention can eliminate the serious slug flow phenomenon well.
Claims (4)
1. separator, comprise housing (2), be connected with incoming flow pipe (1) and steam outlet pipe (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 housing (2) and reaches housing (2) bottom, and said steam outlet pipe (4) is gone up near housing (2) outlet port control valve (6) is set, and steam outlet pipe (4) is communicated with outside housing (2) with asending pipe (3).
One kind eliminate serious slug flow from the gaslift method, it is characterized in that, separator is installed in connecting part at mixed transportation pipeline (8) and asending pipe (3), mixed transportation pipeline (8) is communicated with the incoming flow pipe (1) of separator, gas-liquid fluid in the mixed transportation pipeline (8) 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, make gas enter asending pipe (3) through control valve (6) by steam outlet pipe (4), gas-liquid is mixed the back outflow and is entered stage apparatus on the bank in asending pipe (3).
3. according to claim 2 a kind of eliminate serious slug flow from the gaslift method, it is characterized in that said separator adopts tangential centrifugation, its volume is 2～4 times of asending pipe (3) volume, slenderness ratio is 2.
4. according to claim 2 a kind of eliminate serious slug flow from the gaslift method, it is characterized in that steam outlet pipe (4) and the distance of locating separator bottom being communicated with of asending pipe (3) are 3 times of separator height.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410073493 CN1288383C (en) | 2004-12-27 | 2004-12-27 | Separator and self-airlifting method for eliminating plug flow on serious segments by utilizing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410073493 CN1288383C (en) | 2004-12-27 | 2004-12-27 | Separator and self-airlifting method for eliminating plug flow on serious segments by utilizing same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1632370A true CN1632370A (en) | 2005-06-29 |
| CN1288383C CN1288383C (en) | 2006-12-06 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410073493 Expired - Fee Related CN1288383C (en) | 2004-12-27 | 2004-12-27 | Separator and self-airlifting method for eliminating plug flow on serious segments by utilizing same |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758502A (en) * | 2013-12-31 | 2014-04-30 | 宁波威瑞泰默赛多相流仪器设备有限公司 | Compact GLCC (Gas-Liquid Cylindrical Cyclone) separation supercharging device and manufacturing method thereof |
| CN106369278A (en) * | 2016-09-14 | 2017-02-01 | 西南石油大学 | Novel vertical deep ocean pipe with slug flow subduction |
| CN106439502A (en) * | 2016-09-14 | 2017-02-22 | 西南石油大学 | Vertical pipe interior slug flow online monitoring device and elimination method |
| CN108104793A (en) * | 2017-11-27 | 2018-06-01 | 中石化石油工程技术服务有限公司 | A kind of marine riser gaslift drilling well flow pattern control method |
-
2004
- 2004-12-27 CN CN 200410073493 patent/CN1288383C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103758502A (en) * | 2013-12-31 | 2014-04-30 | 宁波威瑞泰默赛多相流仪器设备有限公司 | Compact GLCC (Gas-Liquid Cylindrical Cyclone) separation supercharging device and manufacturing method thereof |
| CN103758502B (en) * | 2013-12-31 | 2016-03-09 | 宁波威瑞泰默赛多相流仪器设备有限公司 | A kind of compact GLCC is separated supercharging device and manufacture method thereof |
| CN106369278A (en) * | 2016-09-14 | 2017-02-01 | 西南石油大学 | Novel vertical deep ocean pipe with slug flow subduction |
| CN106439502A (en) * | 2016-09-14 | 2017-02-22 | 西南石油大学 | Vertical pipe interior slug flow online monitoring device and elimination method |
| CN108104793A (en) * | 2017-11-27 | 2018-06-01 | 中石化石油工程技术服务有限公司 | A kind of marine riser gaslift drilling well flow pattern control method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1288383C (en) | 2006-12-06 |
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Granted publication date: 20061206 Termination date: 20201227 |