CN207246659U - A kind of flow adjustement device for suppressing to collect serious slug flow in defeated riser systems - Google Patents
A kind of flow adjustement device for suppressing to collect serious slug flow in defeated riser systems Download PDFInfo
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- CN207246659U CN207246659U CN201721047535.XU CN201721047535U CN207246659U CN 207246659 U CN207246659 U CN 207246659U CN 201721047535 U CN201721047535 U CN 201721047535U CN 207246659 U CN207246659 U CN 207246659U
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Abstract
The utility model discloses a kind of flow adjustement device for suppressing to collect serious slug flow in defeated riser systems, described device is made of the elementary cell that two basic structures are formed, the basic structure is made of at least one circle helical structure, the first straight pipe, the second straight pipe, and the closure between each pipeline section is tangential.By ingehious design, the opposite basic structure of two hands of spiral is formed into elementary cell, ensures that the second straight pipe of two basic structures is connected as a single entity, the first straight pipe is in same straight line.Each pipeline section internal diameter of flow adjustement device that the utility model is used to suppress to collect serious slug flow in defeated riser systems is identical, will not produce the problem of can not carrying out pigging operation；And can stablize and be installed on plane and radius of curvature size and basic structure length adjusting range are wide, easy to flexibly use；Heterogeneous fluid does 360 ° of circular motion in basic structure, makes gas-liquid mixed more abundant, has the adjustment effect for significantly inhibiting and collecting defeated riser systems serious slug flow formation.
Description
Technical field
The utility model belongs to petroleum works Multiphase Flow control field, specifically a kind of to suppress to collect defeated riser systems oil
Gas mix it is defeated during serious slug flow formed flow adjustement device.
Background technology
In offshore and gas development, cost is laid with to save off-shore pipeline, generally use multiphase mixes mode by crude oil, natural
The output object such as gas and water gives rise to ocean production platform from seabed and is pre-processed.Generally the transport system is known as to collect defeated standpipe
System, its line construction is complicated, under conditions of gas-liquid flow velocity is relatively low, easily causes the formation of serious slug flow.Severe slug
The generation of stream will trigger liquid phase interruption outflow for a long time, cause the increase of gathering system pressure and yield to reduce；Gas-liquid moment is acute
Strong eruption, causes the structure of efficiency separator reduction and separation equipment to be destroyed；System pressure fluctuation, causes pipeline to shake strongly
The serious problems such as dynamic and off-shore pipeline inner wall corrosion aggravation occur, and the safe and efficient production to whole production system is brought greatly
Challenge.
For harm of the serious slug flow to whole production system is mitigated or eliminated, has various control serious slug flow at present
The technology of formation, mainly includes：
Flow limit method, this method reduce throttling manually by installing throttle in riser top according to system flow situation
Valve opening, when valve opening reduces to a certain extent, collects serious slug flow in defeated riser systems and is changed into steady flow.By
In not stringent operation standard, the method is primarily present excessively throttling risk, causes system pressure excessively to raise and in turn results in
Oil and gas production is greatly reduced.
Insufflation, this method is divided into crestal injection and from gaslift two types, crestal injection is mainly by compressor by gas
Body is pressurized, and is injecting standpipe by gas injection pipeline, injection gas can reduce standpipe along journey pressure drop, so as to suppress liquid plug vertical
The formation of bottom of the tube.British patent GB2374161B discloses a kind of serious slug flow suppressing method in riser bottom gas injection,
But the method needs to inject a large amount of gases and could successfully control the formation of serious slug flow, and needs large-scale as compressor set
It is standby, take valuable platform space；In addition, joule-Thomson cooling effect that insufflation produces, easily leads to wax deposition and water
Compound is formed and then blocking pipeline, therefore economic benefit is poor, and practicality is weaker.Gas inside oil/gas well is mainly utilized from gaslift
Body, introduces standpipe by standpipe upstream gas by installing air entraining device additional, the target for reducing standpipe along journey pressure drop is realized, so as to suppress
The formation of serious slug flow, the method announced such as Chinese invention patent CN1288383C.The method easily occurs there are air entraining pipe
The shortcomings of refluence, pigging operation is difficult, cause practical application very difficult.
Method is automatically controlled, this method is mainly to choose appropriate signals as control input parameter, then by controller to defeated
Enter parameter to be handled, and then adjusting actuator makes vertical Bottomhole pressure be changed into stable state.Riser bottom pressure, riser top
The parameters such as pressure, stand-pipe output flow and system entry flow can be used as control input signal, be believed using which kind of control input
Number and controller architecture be the key for determining control effect, but accurate obtain of deep water underwater signal is chosen to what is effectively controlled
War.Chinese patent CN1297779C discloses the valve throttle dynamic control method for eliminating serious slug flow, but is in this method
The setting of construction in a systematic way mould and controller parameter determines that its selected parameter can not remain unchanged, it is necessary to not by production and operating conditions
Disconnected adjustment, causes in practical application that there is also some limitations.
Partition method, mainly by installing seabed gas-liquid separation device, gas-liquid split-phase is delivered to more than sea, such as middle promulgated by the State Council
The split-phase carrying method that serious slug flow is eliminated using separator that bright patent CN1297778C is announced, this method, which is primarily present, builds
If with installation cost it is higher the shortcomings that.
Flow adjustment method, the method are filled mainly by the way that disturbance device is installed on standpipe upstream certain position by disturbing
The immixture put makes to enter fluidal texture in standpipe and changes, so as to suppress the formation of serious slug flow.Such as United States Patent (USP)
The suppression severe slug manifold that US6041803, United States Patent (USP) US8393398B2 and United States Patent (USP) US7857059B2 are proposed
Into device.It is respectively present in above-mentioned patent：Flow section, which changes, can not carry out pigging operation, fluid flow direction acute variation
Cause to the device impact it is larger, there are downward elbow to make bottom of device not cause the problems such as not easy to install in same plane,
Certain challenge is brought to practical application.
The content of the invention
For shortcoming present in existing flow adjustment technology, the purpose of this utility model is to provide one kind effectively to press down
System collects the flow adjustement device that serious slug flow is formed in defeated riser systems, which will not make the pigging of system
Industry causes difficulty, impact that will not be larger caused by fluid flow direction acute variation is to device, can be realized using the device
The target significantly inhibited to serious slug flow, reduces or eliminates the big ups and downs of severe slug flowing pressure and flow velocity to system production
Serious harm caused by safety.
To reach above-mentioned purpose, the utility model adopts the following technical solution：
A kind of flow adjustement device for suppressing to collect serious slug flow in defeated riser systems, including at least two basic structures,
The basic structure includes：
At least one circle helical structure and connected first straight pipe, the second straight pipe；
Helical structure is identical with the internal diameter of the first straight pipe, the second straight pipe, and closure is tangential；
The spiral number of turns of helical structure are integer, and direction is left or right rotation, and central axes are with crossing the first straight pipe or second
The perpendicular of straight pipe is vertical；
Two basic structures form an elementary cell.
Elementary cell is in series by two opposite basic structures of the hand of spiral, makes the second straight tube of two basic structure
Section be connected as a single entity, the first straight pipe it is conllinear, between each basic structure can it is tangent also mutually from.
Radius of spin r, pitch P and the number of turns N of helical structure are adjusted, realizes the amplitude and shape adjustment of basic structure；
The length of the first straight pipe, the length of the second straight pipe, the radius of spin r of helical structure are adjusted, realizes basic knot
The adjusting of structure length L.
Two reverse basic structures that each elementary cell is included, its helical structure are identical or different.
When setting two and two or more elementary cell, the connection mode between elementary cell is series connection, each substantially single
The geometric parameter of member is identical or different.
When setting two and during two or more elementary cell, it is tangent between each elementary cell or mutually from.
A kind of above-mentioned flow adjustement device for suppressing to collect serious slug flow in defeated riser systems, is installed on riser bottom upstream
Certain distance position, described device can promote interaction of gas and liquid to change the fluidal texture into standpipe with reducing gas using it
The principle of compressible space, is substantially reduced serious slug flow cycle and standpipe pressure-difference fluctuation amplitude, realizes to collecting defeated riser systems
The suppression function that serious slug flow is formed.And the device has that processing technology is simple, do not influence pigging operation and structure type is more
The advantages of sample, in practical applications it is very convenient with it is flexible.
Brief description of the drawings
Fig. 1 is that the utility model basic structure composition schematic diagram (a) encloses spiral basic structure for one, and (b) is two circle spiral shells
The basic structure of rotation；
Fig. 2 is that the parameter schematic diagram (a) of two kinds of basic structure is the spiral elementary structure parameter of a circle, and (b) is two circle spiral shells
Revolve elementary structure parameter；
Fig. 3 is that several elementary cell schematic diagrames (a) are that tangent and its radius of spin is equal between two basic structures, and (b) is
Between two basic structures mutually from and its radius of spin it is equal, (c) is tangent and upstream basic structure spiral shell between two basic structures
The radius of spin that radius is more than downstream basic structure is revolved, (d) is tangent and upstream basic structure spiral between two basic structures
Radius is less than the radius of spin of downstream basic structure；
Fig. 4 is the flowing tune that a identical elementary cells of n (n >=1) being made of the equal basic structure of the radius of spin form
Regulating device；
Fig. 5 is the stream that a identical elementary cells of n (n >=1) that the basic structure being sequentially reduced by the radius of spin is formed form
Dynamic regulating device；
Fig. 6 is the stream that a identical elementary cells of n (n >=1) that the basic structure being sequentially increased by the radius of spin is formed form
Dynamic regulating device；
Fig. 7 is the stream that a different elementary cells of n (n >=1) that the basic structure being sequentially increased by the radius of spin is formed form
Dynamic regulating device；
Fig. 8 is the stream that a different elementary cells of n (n >=1) that the basic structure being sequentially reduced by the radius of spin is formed form
Dynamic regulating device；
Fig. 9 is the flow adjustement device that two identical elementary cells being made of the equal basic structure of the radius of spin form
For the schematic diagram for suppressing to collect serious slug flow in defeated riser systems；
Figure 10 is the flow adjustment dress that two identical elementary cells being made of the equal basic structure of the radius of spin form
Put the inhibition figure to standpipe pressure-difference fluctuation amplitude.
Embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings：
A kind of flow adjustement device for suppressing to collect serious slug flow in defeated riser systems, including at least two basic structures,
The basic structure includes：
At least one circle helical structure and connected first straight pipe, the second straight pipe；
Helical structure is identical with the internal diameter of the first straight pipe, the second straight pipe, and closure is tangential；
The number of turns of helical structure is integer, and direction can be left or right rotation, and central axes are with crossing the first straight pipe or second
The perpendicular of straight pipe is vertical；
Including at least one elementary cell, elementary cell is in series by two opposite basic structures of the hand of spiral, is made
Second straight pipe of two basic structures is connected as a single entity, the first straight pipe is conllinear, it is tangent between each basic structure or mutually from.
By adjusting the radius of spin, pitch and the number of turns of helical structure, the amplitude and shape adjustment of basic structure are realized；
By adjusting the radius of spin of the first flow development length, the second flow development length, pigtail, basic structure is realized
Length adjustment.
Two reverse basic structures that each elementary cell is included, its helical structure may be the same or different.
When setting two or more elementary cell, the connection mode between elementary cell is connects, the knot of each elementary cell
Structure may be the same or different.
When setting two and during two or more elementary cell, it is tangent between each elementary cell or mutually from.
Shown in Figure 1, the utility model gives a kind of suppression of two compositions and collects serious slug flow in defeated riser systems
Flow adjustement device basic structure, including：Helical structure, the first straight pipe, the second straight pipe.
Shown in Figure 2, the geometric parameter of basic structure is mainly by basic structure length L, the radius of spin of helical structure
R, the pitch P of helical structure, the spiral number of turns N (N >=1) of helical structure and bore d are determined.Can basis in implementation process
Collecting defeated vertical tube structure form and each parameter of device installation environment flexible modulation makes device meet engineer application requirement.
, can be by the basic structure assembled in series of a variety of different parameters into a variety of multi-forms on the basis of above-mentioned technical proposal
Elementary cell, form elementary cell spiral of each basic structure can be tangent or mutually from spiral the half of each basic structure
Footpath can be equal, can also be sequentially increased or reduce, shown in Figure 3.
The principle of the utility model is with advantage：
1. under the conditions of relatively low conversion liquid speed, change gentle updip since described device exists and have a down dip pipeline section and make point
The heterogeneous fluid fluid of layer starts to accumulate, and is stood so as to destroy standpipe upstream tier fluidal texture with being formed after shorter liquid plug to flow into
Pipe, finally suppresses to collecting big ups and downs caused by serious slug flow in defeated riser systems；
2. under the conditions of higher conversion liquid speed, liquid phase has the ability for relatively carrying gas phase by force, and heterogeneous fluid is each basic
Multiple 360 ° of circular motion is done in unit, it can be achieved that gas-liquid is alternate is sufficiently mixed, gas-liquid two-phase then more continuously into
Standpipe, finally effectively suppresses to collecting big ups and downs caused by serious slug flow in defeated riser systems；
3. described device is along journey, caliber without mutation, will not impact the regular pigging operation of pipeline system everywhere；
, can be by the way that length, the second straight pipe of the first straight pipe be adjusted flexibly 4. described device is simple in structure, easy to process
Length, the radius of spin and spiral number of turns of helical structure, the length of realization device adjusts with the contact area of device and plane,
Engineering practicability with higher；
5. the elementary cell curvature of described device is smaller, flowing side phase change of the heterogeneous fluid in elementary cell is gentle,
Larger impact will not be produced to device, the service life of device can be dramatically increased.
On the basis of above-mentioned technical proposal, diversified forms can be made up of elementary cell of connecting is used to suppress the defeated standpipe of collection
The flow adjustement device of system serious slug flow.Above-mentioned flow adjustement device can be by the elementary cell of multiple identical geometric parameters
It is in series：Device can be formed by a identical elementary cells of n (n >=1) that the equal basic structure of the radius of spin is formed, referring to figure
Shown in 4；A identical elementary cells of n (n >=1) that the basic structure that can be sequentially reduced by the radius of spin is formed form device, referring to
Shown in Fig. 5；A identical elementary cells of n (n >=1) that the basic structure that can be sequentially increased by the radius of spin is formed form device, ginseng
As shown in Figure 6.
On the basis of above-mentioned technical proposal, diversified forms can be made up of elementary cell of connecting is used to suppress the defeated standpipe of collection
The flow adjustement device of system serious slug flow.Above-mentioned flow adjustement device can be by the elementary cell of multiple and different geometric parameters
Assemble, a different elementary cells of the n (n >=1) that the basic structure that can be sequentially increased by the radius of spin is formed form device, join
As shown in Figure 7；A different elementary cells of n (n >=1) that the basic structure that can be sequentially reduced by the radius of spin is formed form device,
It is shown in Figure 8.
On the basis of above-mentioned technical proposal, two identical elementary cells will being made of the equal basic structure of the radius of spin
The flow adjustement device of composition is implemented to be installed on the position for the riser base upstream certain distance for collecting defeated riser systems, to realize suppression
System collects the function that serious slug flow is formed in defeated riser systems, shown in Figure 9.
On the basis of above-mentioned technical proposal, using the defeated riser systems of collection after the installation flow device shown in Fig. 9 as in fact
Apply case and carry out experimental study, the standpipe pressure-difference fluctuation characteristic before and after the above-mentioned flow adjustement device of installation is compared, referring to
Shown in Figure 10.Flow instabilities harm is obviously reduced by the device by varying fluidal texture in standpipe, such as can be by fluctuating range
Acutely it is smaller with the higher another kind of severe slug of vibration frequency to be changed into fluctuating range for the serious slug flow low with vibration frequency
Stream or Oscillation Flows, or even that first kind serious slug flow can be directly translated into fluctuating range is small with the high stationary flow of vibration frequency
Dynamic, standpipe entirety pressure-difference fluctuation amplitude is significantly reduced, and the maximal percentage inhibition to standpipe pressure-difference fluctuation amplitude is about 60%, explanation
Above-mentioned flow adjustement device has the function of to significantly inhibit in the defeated riser systems of collection that serious slug flow produces acute fluctuation, available for pressing down
System collects the generation of serious slug flow in defeated riser systems, to improve the economic benefit of system operation and security performance.
The several embodiments of the utility model are above are only, the embodiment being not all of.Ordinary skill people
Member is this reality by reading the utility model specification any equivalent conversion for taking technical solutions of the utility model
Covered with new claim.
Claims (6)
1. a kind of flow adjustement device for suppressing to collect serious slug flow in defeated riser systems, it is characterised in that including at least two
Basic structure, the basic structure include：
At least one circle helical structure (1) and connected first straight pipe (2), the second straight pipe (3)；
Helical structure (1) is identical with the internal diameter of the first straight pipe (2), the second straight pipe (3), and closure is tangential；
The spiral number of turns of helical structure (1) are integer, and direction is left or right rotation, and central axes are with crossing the first straight pipe (2) or the
The perpendicular of two straight pipes (3) is vertical；
Two basic structures form an elementary cell.
2. a kind of flow adjustement device for suppressing to collect serious slug flow in defeated riser systems according to claim 1, it is special
Sign is that elementary cell is in series by two opposite basic structures of the hand of spiral, makes the second straight tube of two basic structure
Section (3) be connected as a single entity, the first straight pipe (2) collinearly, between each basic structure can it is tangent also mutually from.
3. a kind of flow adjustement device for suppressing to collect serious slug flow in defeated riser systems according to claim 1, it is special
Sign is, adjusts radius of spin r, pitch P and the number of turns N of helical structure (1), realizes the amplitude and shape adjustment of basic structure；
The length of the first straight pipe (2), the length of the second straight pipe (3), the radius of spin r of helical structure are adjusted, is realized basic
The adjusting of structure length L.
4. a kind of flow adjustement device for suppressing to collect serious slug flow in defeated riser systems according to claim 2, it is special
Sign is：Two reverse basic structures that each elementary cell is included, its helical structure (1) are identical or different.
5. a kind of flow adjustement device for suppressing to collect serious slug flow in defeated riser systems according to claim 1 or 2, its
It is characterized in that, when setting two and two or more elementary cell, the connection mode between elementary cell is series connection, each substantially single
The geometric parameter of member is identical or different.
6. a kind of flow adjustement device for suppressing to collect serious slug flow in defeated riser systems according to claim 2, it is special
Sign is, when setting two and two or more elementary cell, it is tangent between each elementary cell or mutually from.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721047535.XU CN207246659U (en) | 2017-08-21 | 2017-08-21 | A kind of flow adjustement device for suppressing to collect serious slug flow in defeated riser systems |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721047535.XU CN207246659U (en) | 2017-08-21 | 2017-08-21 | A kind of flow adjustement device for suppressing to collect serious slug flow in defeated riser systems |
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| Publication Number | Publication Date |
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| CN207246659U true CN207246659U (en) | 2018-04-17 |
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|---|---|---|---|
| CN201721047535.XU Withdrawn - After Issue CN207246659U (en) | 2017-08-21 | 2017-08-21 | A kind of flow adjustement device for suppressing to collect serious slug flow in defeated riser systems |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355636A (en) * | 2017-08-21 | 2017-11-17 | 西安交通大学 | A kind of flow adjustement device for suppressing to collect serious slug flow in defeated riser systems |
-
2017
- 2017-08-21 CN CN201721047535.XU patent/CN207246659U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107355636A (en) * | 2017-08-21 | 2017-11-17 | 西安交通大学 | A kind of flow adjustement device for suppressing to collect serious slug flow in defeated riser systems |
| CN107355636B (en) * | 2017-08-21 | 2024-03-29 | 西安交通大学 | Flow regulating device for inhibiting severe slug flow in gathering and transportation vertical pipe system |
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