CN103670368A - Gas-liquid two-phase metering device - Google Patents
Gas-liquid two-phase metering device Download PDFInfo
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- CN103670368A CN103670368A CN201210348340.4A CN201210348340A CN103670368A CN 103670368 A CN103670368 A CN 103670368A CN 201210348340 A CN201210348340 A CN 201210348340A CN 103670368 A CN103670368 A CN 103670368A
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- 239000007788 liquid Substances 0.000 title claims abstract description 113
- 239000000523 sample Substances 0.000 claims description 3
- 239000007789 gas Substances 0.000 abstract description 28
- 238000000034 method Methods 0.000 abstract description 13
- 230000008569 process Effects 0.000 abstract description 7
- 238000000926 separation method Methods 0.000 abstract description 4
- 239000002343 natural gas well Substances 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 28
- 239000012530 fluid Substances 0.000 description 24
- 239000012071 phase Substances 0.000 description 24
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 18
- 239000000203 mixture Substances 0.000 description 9
- 239000003345 natural gas Substances 0.000 description 9
- 238000005259 measurement Methods 0.000 description 6
- 238000005516 engineering process Methods 0.000 description 3
- 238000000691 measurement method Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 241000278713 Theora Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
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Abstract
The invention discloses a gas-liquid two-phase metering device which comprises a gas-liquid through pipe (1), a first differential pressure transmitter (4) and a second differential pressure transmitter (5), wherein V-cone throttling pieces (2) and Venturi throttling pieces (3) are arranged in the gas-liquid through pipe (1) at intervals, the first differential pressure transmitter (4) is connected with the V-cone throttling pieces (2), the second differential pressure transmitter (5) is connected with the Venturi throttling pieces (3), the V-cone throttling pieces (2) are arranged on the upper flow section of the gas-liquid through pipe (1), and the Venturi throttling pieces (3) are arranged on the lower flow section of the gas-liquid through pipe (1). According to the invention, the V-cone throttling element and the Venturi throttling element are arranged in the gas-liquid through pipe, and the V-cone throttling element and the Venturi throttling element are respectively connected with the differential pressure transmitter, so that the problem that gas-liquid metering needs to be separately metered in a single natural gas well metering process is solved, and the non-separation on-line continuous metering of the gas yield and the liquid yield of the single natural gas well is realized.
Description
Technical field
The present invention relates to measuring equipment field, particularly a kind of gas-liquid two-phase metering device, is mainly used in gas-liquid in the production process of natural gas not gas production under separation case, the real-time online measuring of production fluid amount.
Background technology
In production process of natural gas, gas well gas production, production fluid amount are one of significant datas of gas field production management, being the important evidence of formulating production technology, determining production procedure and production management mode, is also to optimize the basic data that gas field is joined product, guaranteed gas reservoir rational exploitation.
The metering of gas as single well production belongs to the metering of two-phase or multiphase stream, and it is the measuring method of single-phase instrument combine that moisture metering adopted more, not strong to the compliance of working conditions change.At present, natural gas individual well metering process is divided in station two kinds of separate measurement and well head on-line metering techniques, and the metering device adopting is single-phase flow metering device, in various metering process, method is still and adopts traditional isolation technics the most accurately, metering separately after being respectively separated.
With the example that is practiced as in domestic certain gas field, the metering of gas as single well production is mainly divided into separate measurement and well head on-line metering in station.The device that in standing, separate measurement technique adopts mainly comprises eliminator, orifice flowmeter, electrical ball valve etc., individual well comes gas after reducing pressure by regulating flow, to enter eliminator to carry out separation, single phase gas after separation measures through orifice flowmeter, production fluid is estimated according to the on-off times of eliminator discharge opeing electrical ball valve, gas dosing is dry gas metering, and measuring accuracy is high.What well head on-line metering adopted is intelligent precession spiral flowmeter, the metering of gas well output object is equivalent to the metering of single phase gas, has ignored the impact of production fluid on measuring accuracy, data remote.
In realizing process of the present invention, inventor finds that prior art at least exists following problem: no matter be separate measurement technique in station, or well head on-line metering technique, the production fluid amount that all can not effectively measure the natural gas well.Wherein, the eliminator discharge opeing electrical ball valve on-off times estimation production fluid amount of separate measurement process using in standing, closes discharged liquid and is not quite similar because electrical ball valve is opened at every turn, causes individual well liquid producing amount measure error large; Well head on-line metering technique has been ignored the metering of gas well production fluid especially, because causing the actual flow velocity of gas phase, the existence of liquid phase increases, add between gas-liquid two-phase the tolerance actual measurement difference that complicated interaction makes higher, caused the error in dipping of gas output per well.
Summary of the invention
In order to solve the problem of prior art, the embodiment of the present invention provides a kind of gas-liquid two-phase metering device, be mainly used in the on-line metering of natural gas individual well gas production, liquid producing amount measure, the natural gas breaking traditions is the technology pattern of separated rear metering first, realizes the not separated on-line continuous metering of natural gas individual well gas production, production fluid amount.Described technical scheme is as follows:
The invention provides a kind of gas-liquid two-phase metering device, comprise gas-liquid siphunculus, the first pressure difference transmitter and the second pressure difference transmitter, in described gas-liquid siphunculus pipe, be provided with to spacing V cone throttling element and venturi throttling element, described the first pressure difference transmitter is connected with described V cone throttling element, described the second pressure difference transmitter is connected with described venturi throttling element, described V cone throttling element is arranged on the upper flow section of described gas-liquid siphunculus, and described venturi throttling element is arranged on dirty section of described gas-liquid siphunculus.V cone throttling element is set in gas-liquid siphunculus pipe and can calculates gas in the gas-liquid siphunculus of flowing through and the flow of liquid based on the flow principle of continuity and Bernoulli equation, the accuracy of measurement and stability are very high.The accuracy that gas-liquid mixture fluid that venturi throttling element solved low pressure, Large Diameter Pipeline, low flow velocity is measured is set in gas-liquid siphunculus pipe, and this venturi throttling element is concealed Venturi pipe.
Further, described V cone throttling element is hung on the tube core place of described gas-liquid siphunculus, is gap setting between described V cone throttling element periphery and described gas-liquid siphunculus inwall.
Further, described venturi throttling element periphery is cylindrical, between described venturi throttling element periphery and described gas-liquid siphunculus inwall, is close to setting.
Further, described the first pressure difference transmitter has the first tracheae and the second tracheae, and described the first tracheae is communicated with described gas-liquid siphunculus, and described the second tracheae is communicated with the inner tube of described V cone throttling element.
Further, described the second pressure difference transmitter has the 3rd tracheae and the 4th tracheae, and described the 3rd tracheae is communicated with described gas-liquid siphunculus, and described the 4th tracheae is communicated with the inner tube of described venturi throttling element.
Further, between described V cone throttling element and the first end of described gas-liquid siphunculus, it is the first turbulent straight length, between described V cone throttling element and described venturi throttling element, being the second turbulent straight length, is the 3rd turbulent straight length between described venturi throttling element and the second end of described gas-liquid siphunculus.
Further, described the first turbulent straight length place is provided with pressure transmitter, and described pressure transmitter is communicated with described gas-liquid siphunculus.
Further, described the 3rd turbulent straight length place is provided with temperature transmitter, and described temperature transmitter has probe to extend in described gas-liquid siphunculus.
Further, described gas-liquid two-phase metering device also comprises computer processing system, and described V cone throttling element, described venturi throttling element, described pressure transmitter are connected by data wire with described computer processing system with described temperature transmitter.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
By V cone throttling element and venturi throttling element are set in gas-liquid siphunculus, and V cone throttling element is connected with a differential pressure transmitter respectively with venturi throttling element, thereby solved gas-liquid metering in natural gas individual well metering process need separated after the problem of metering separately, realized the not separated on-line continuous metering of natural gas individual well gas production, production fluid amount; Realized individual well daily output tolerance, the automatic computing of production fluid amount, can the zero clearing of twenty four hours automatic cycle, storage, solved the problem that gas field individual well separate measurement technique needs manual switching measurement flow and accounting report.On the other hand, the measuring accuracy of this gas-liquid two-phase metering device is high, through experimental examination, and on-line metering gas production error ± 5%, production fluid amount error ± 10%.Finally, this gas-liquid two-phase metering device is simple in structure, easy to operate, cost is low.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the gas-liquid two-phase metering device schematic flow sheet that the embodiment of the present invention provides;
Fig. 2 is the gas-liquid two-phase metering device structural representation that the embodiment of the present invention provides.
The specific embodiment
For making the object, technical solutions and advantages of the present invention clearer, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Embodiment
The present embodiment provides a kind of gas-liquid two-phase metering device, referring to Fig. 1 and Fig. 2, this gas-liquid two-phase metering device comprises gas-liquid siphunculus 1, the first pressure difference transmitter 4 and the second pressure difference transmitter 5, this gas-liquid siphunculus 1 is body cylindraceous, gas-liquid siphunculus 1 has the first end 11 of air inlet liquid fluid and discharges the second end 12 of gas-liquid fluid, on the ora terminalis of first end 11 and the second end 12, be respectively arranged with mounting flange, during use, this gas-liquid two-phase metering device is fixed on the natural gas line of gas gathering station internally heated oven outlet by mounting flange.
In gas-liquid siphunculus 1 pipe, be provided with to spacing V cone throttling element 2 and venturi throttling element 3, this V cone throttling element 2 and venturi throttling element 3 are single-phase flow meter, i.e. Series Sheet phase flow rate meter V cone throttling element 2 and venturi throttling element 3 in gas-liquid siphunculus 1 pipe.V cone throttling element 2 is arranged on the upper flow section of gas-liquid siphunculus 1, and venturi throttling element 3 is arranged on dirty section of gas-liquid siphunculus 1.Like this, can utilize these two single-phase flow meters different to the response characteristic of moisture under the same conditions, thereby set up corresponding moisture correlation, simultaneous solution obtains the flow of gas-liquid two-phase.
The first pressure difference transmitter 4 and the second pressure difference transmitter 5 are all arranged on the outside of gas-liquid siphunculus 1, and all have tracheae and be communicated with gas-liquid siphunculus 1, and wherein, the first pressure difference transmitter 4 is connected with V cone throttling element 2, and the second pressure difference transmitter 5 is connected with venturi throttling element 3.Particularly, the first pressure difference transmitter 4 has the first tracheae 41 and the second tracheae 42, the first tracheae 41 is communicated with gas-liquid siphunculus 1, the second tracheae 42 is communicated with the inner tube of V cone throttling element 2, before the first tracheae 41 is arranged on the second tracheae 42, the first tracheae 41 from the distance of the first end 11 of gas-liquid siphunculus 1 than the second tracheae 42 near distance from the first end 11 of gas-liquid siphunculus 1.V cone throttling element 2 is arranged on the axle core place of gas-liquid siphunculus 1 by the second tracheae 42.When gas-liquid mixture fluid is when flowing through V cone throttling element 2, gas-liquid mixture fluid forms pressure difference in the front and back of V cone throttling element 2, and the first pressure difference transmitter 4 is for measuring gas-liquid mixture fluid at the pressure reduction at V cone throttling element 2 places, front and back of flowing through.The second pressure difference transmitter 5 has the 3rd tracheae 51 and the 4th tracheae 52, the 3rd tracheae 51 is communicated with gas-liquid siphunculus 1, the 4th tracheae 52 is communicated with the inner tube of venturi throttling element 3, before the 3rd tracheae 51 is arranged on the 4th tracheae 52, when gas-liquid mixture fluid is flowed through venturi throttling element 3, in the place ahead of venturi throttling element 3 and the venturi place of venturi throttling element 3, form pressure reduction, the second pressure difference transmitter 5 is for measuring the magnitude of pressure differential at this two place.
Preferably, V cone throttling element 2 is hung on the tube core place of gas-liquid siphunculus 1, is gap setting between V cone throttling element 2 peripheries and gas-liquid siphunculus 1 inwall.Particularly, the second tracheae 42 is through the tube wall of gas-liquid siphunculus 1, and one end of the second tracheae 42 is deep into the place, axle center of gas-liquid siphunculus 1, and V cone throttling element 2 is fixed on that one end of being deep into gas-liquid siphunculus 1 place, axle center of the second tracheae 42.Venturi throttling element 3 peripheries are cylindrical, the outer circumference diameter of venturi throttling element 3 less times greater than or equal the internal diameter of gas-liquid siphunculus 1, between venturi throttling element 3 peripheries and gas-liquid siphunculus 1 inwall, be close to setting.
Between V cone throttling element 2 and the first end 11 of gas-liquid siphunculus 1, it is the first turbulent straight length 13, between V cone throttling element 2 and venturi throttling element 3, being the second turbulent straight length 14, is the 3rd turbulent straight length 15 between the second end 12 of venturi throttling element 3 and gas-liquid siphunculus 1.Be gas-liquid mixture fluid enter into gas-liquid siphunculus 1 interior after, after the first turbulent straight length 13, by V, bore throttling element 2, after the second turbulent straight length 14, pass through again venturi throttling element 3, make like this gas-liquid mixture fluid process bore throttling element 2 and venturi throttling element 3 by V before turbulent fully, gas-liquid is mixed more fully, and gas-liquid distributes more even.
Gas-liquid siphunculus 1 outer setting at the first turbulent straight length 13 places has pressure transmitter 6, and this pressure transmitter 6 is communicated with gas-liquid siphunculus 1 by tracheae, thereby pressure transmitter 6 is measured the pressure of the gas-liquid mixture fluid at gas-liquid siphunculus 1 this place that flows through.At the 3rd turbulent straight length 15 places, be provided with temperature transmitter 7, this temperature transmitter 7 has probe to extend in gas-liquid siphunculus 1, and temperature transmitter 7 is measured the temperature of the gas-liquid mixture fluid in the gas-liquid siphunculus 1 of flowing through.
Control room or the place of controlling at this gas-liquid two-phase metering device are provided with computer processing system 8, and V cone throttling element 2, venturi throttling element 3, pressure transmitter 6 are all connected by data wire with computer processing system 8 with temperature transmitter 7.V cone throttling element 2, venturi throttling element 3, pressure transmitter 6 and temperature transmitter 7 are transferred to computer processing system 8 by data wire by the signal collecting, computer processing system 8 carries out data processing by professional software, can automatically calculate the instantaneous gas production of being logged well, instantaneous production fluid amount, cumulative gas and accumulative total production fluid amount.
The foregoing is only preferred embodiment of the present invention, in order to limit the present invention, within the spirit and principles in the present invention not all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (9)
1. a gas-liquid two-phase metering device, comprises gas-liquid siphunculus (1), it is characterized in that, is provided with to spacing V cone throttling element (2) and venturi throttling element (3) in described gas-liquid siphunculus (1) pipe;
Described gas-liquid two-phase metering device also comprises the first pressure difference transmitter (4) and the second pressure difference transmitter (5), described the first pressure difference transmitter (4) is connected with described V cone throttling element (2), and described the second pressure difference transmitter (5) is connected with described venturi throttling element (3);
Described V cone throttling element (2) is arranged on the upper flow section of described gas-liquid siphunculus (1), and described venturi throttling element (3) is arranged on dirty section of described gas-liquid siphunculus (1).
2. gas-liquid two-phase metering device according to claim 1, it is characterized in that, described V cone throttling element (2) is hung on the tube core place of described gas-liquid siphunculus (1), is gap setting between described V cone throttling element (2) periphery and described gas-liquid siphunculus (1) inwall.
3. gas-liquid two-phase metering device according to claim 1, is characterized in that, described venturi throttling element (3) periphery is cylindrical, between described venturi throttling element (3) periphery and described gas-liquid siphunculus (1) inwall, is close to setting.
4. gas-liquid two-phase metering device according to claim 1, it is characterized in that, described the first pressure difference transmitter (4) has the first tracheae (41) and the second tracheae (42), described the first tracheae (41) is communicated with described gas-liquid siphunculus (1), and described the second tracheae (42) is communicated with the inner tube of described V cone throttling element (2).
5. gas-liquid two-phase metering device according to claim 1, it is characterized in that, described the second pressure difference transmitter (5) has the 3rd tracheae (51) and the 4th tracheae (52), described the 3rd tracheae (51) is communicated with described gas-liquid siphunculus (1), and described the 4th tracheae (52) is communicated with the inner tube of described venturi throttling element (3).
6. gas-liquid two-phase metering device according to claim 1, it is characterized in that, between described V cone throttling element (2) and the first end (11) of described gas-liquid siphunculus (1), it is the first turbulent straight length (13), between described V cone throttling element (2) and described venturi throttling element (3), being the second turbulent straight length (14), is the 3rd turbulent straight length (15) between described venturi throttling element (3) and second end (12) of described gas-liquid siphunculus (1).
7. gas-liquid two-phase metering device according to claim 6, is characterized in that, described the first turbulent straight length (13) locates to be provided with pressure transmitter (6), and described pressure transmitter (6) is communicated with described gas-liquid siphunculus (1).
8. gas-liquid two-phase metering device according to claim 6, is characterized in that, described the 3rd turbulent straight length (15) locates to be provided with temperature transmitter (7), and described temperature transmitter (7) has probe to extend in described gas-liquid siphunculus (1).
9. according to the gas-liquid two-phase metering device described in claim 7 or 8, it is characterized in that, described gas-liquid two-phase metering device also comprises computer processing system (8), and described V cone throttling element (2), described venturi throttling element (3), described pressure transmitter (6) are connected by data wire with described computer processing system (8) with described temperature transmitter (7).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210348340.4A CN103670368A (en) | 2012-09-18 | 2012-09-18 | Gas-liquid two-phase metering device |
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| CN201210348340.4A CN103670368A (en) | 2012-09-18 | 2012-09-18 | Gas-liquid two-phase metering device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107882547A (en) * | 2016-09-29 | 2018-04-06 | 中国石油化工股份有限公司 | Duct type high-water-cut oil-producing well produces liquid three-phase metering mechanism and method |
| CN110541694A (en) * | 2019-10-12 | 2019-12-06 | 克拉玛依胜利高原机械有限公司 | Wellhead skid-mounted process assembly |
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Application publication date: 20140326 |