CN202421207U - Seven-electrode array correlated conductive sensor for measuring flow speed - Google Patents
Seven-electrode array correlated conductive sensor for measuring flow speed Download PDFInfo
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- CN202421207U CN202421207U CN2011205006947U CN201120500694U CN202421207U CN 202421207 U CN202421207 U CN 202421207U CN 2011205006947 U CN2011205006947 U CN 2011205006947U CN 201120500694 U CN201120500694 U CN 201120500694U CN 202421207 U CN202421207 U CN 202421207U
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- 230000002596 correlated effect Effects 0.000 title 1
- 239000012530 fluid Substances 0.000 claims abstract description 18
- 239000011159 matrix material Substances 0.000 claims description 9
- 238000009413 insulation Methods 0.000 claims description 6
- 229910001220 stainless steel Inorganic materials 0.000 claims description 4
- 239000010935 stainless steel Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims 2
- 239000011521 glass Substances 0.000 claims 1
- 238000005259 measurement Methods 0.000 abstract description 13
- 238000005314 correlation function Methods 0.000 abstract description 6
- 230000004927 fusion Effects 0.000 abstract description 3
- 230000005284 excitation Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 8
- 238000011144 upstream manufacturing Methods 0.000 description 4
- 238000012360 testing method Methods 0.000 description 3
- 230000005514 two-phase flow Effects 0.000 description 3
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- 238000010586 diagram Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002902 bimodal effect Effects 0.000 description 1
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- 239000003208 petroleum Substances 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000005309 stochastic process Methods 0.000 description 1
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Abstract
本实用新型公开一种用于井下流体流动速度测量的七电极阵列相关流速测量电导传感器，其特征是：在传感器内壁上加工7个有间距的凹型环槽，每个凹型环槽内依次镶嵌激励电极环E1，测量电极环M1、测量电极环M2、测量电极环M0，测量电极环M3，测量电极环M4，激励电极环E2。本实用新型的目的在于解决现有六电极相关测速电导传感器测量垂直管道内流体流速时测量精度不高的问题。该传感器可输出四路电导波动信号，通过计算四路信号的互相关函数，并对结果进行数据融合，从而提高井下流体流动速度测量的精度。
The utility model discloses a seven-electrode array correlation flow velocity measurement conductance sensor for downhole fluid flow velocity measurement. Electrode ring E1, measuring electrode ring M1, measuring electrode ring M2, measuring electrode ring M0, measuring electrode ring M3, measuring electrode ring M4, excitation electrode ring E2. The purpose of the utility model is to solve the problem that the measurement accuracy is not high when the existing six-electrode correlation speed measuring conductance sensor measures the fluid velocity in the vertical pipeline. The sensor can output four channels of conductance fluctuation signals, and by calculating the cross-correlation function of the four channels of signals, and performing data fusion on the results, the accuracy of downhole fluid flow velocity measurement can be improved.
Description
Technical field
The utility model relates to a kind of testing sensor, especially relates to a kind of seven electrod-array associated flow rate that are used for the fluids underground fluid-velocity survey and measures conductivity sensor.
Background technology
Oil, gas, water multiphase extensively are present in the modern petroleum industry, therefore its Research on Measuring Technology are had great importance.Polyphasic flow parameter detecting technology has become a conditionality factor of polyphasic flow research field; Wherein, Flow measurement is an important research contents, adopts tachometric method to come to measure indirectly the flow of oil country tubular good inner fluid usually, and this moment, the accurate measurement of speed seemed crucial.Have wide, the no movable member of measurement range owing to correlation method tests the speed, do not hinder advantages such as mobile, be widely used in various two-phase flow velocity measuring systems at present.Can know according to random theory; Cross correlation function is the description of two stochastic process correlativitys; In fact conductivity sensor upstream and downstream signal is made computing cross-correlation is exactly the similarity degree that under the different time delay value, compares two signal waveforms; Thereby obtain the transit time, the relevant speed of fluid can be represented with the spacing of upstream and downstream measurement of correlation sensor and the ratio of transit time.
But correlation method tests the speed and requires between two sensors the pipe interior fluid to flow to satisfy " SOLIDIFICATION MODEL ", promptly only mutually fully under the flow condition of disperse, just can obtain to have the cross correlation function curve of clear and definite spike discrete.In the actual well logging in oil field; When the utilization correlation technique is carried out fluid velocity and flow measurement; Really not so simple: the polyphasic flow fluid flows to the downstream sensor process from upstream sensor, can produce new distribution because of the effect of random turbulence group in the fluid, and variation to a certain degree can take place flow pattern; This will cause the similarity degree of the stochastic flow moving noise signal waveform of upstream and downstream sensor output to reduce, and its effect is equivalent to the random disturbance noise signal that on the downstream flow noise signal, superposeed.In using traditional six electrode correlation speed measurement conductivity sensor measuring vertical pipelines during the flow velocity of oil-water two-phase flow; Often observe the cross correlation function curve of smooth peak, bimodal even multimodal; For the peak value searching has brought difficulty; And then influence the estimated accuracy of transit time, cause the measuring error of speed and flow.
Summary of the invention
In order to improve the precision of correlation method oil-water two-phase flow fluid-velocity survey, the utility model provides a kind of seven electrod-array associated electrical derivative sensors, and this sensor can extract the more fluid flowing information, and improves the precision that fluid-flow rate is measured.
The technical scheme of the utility model is: this kind is used for the seven electrod-array associated flow rate that the downhole fluid flowing velocity measures and measures conductivity sensor, is made up of sensor stand and seven stainless steel electrode rings being built in wherein.Wherein, sensor adopts the insulation plexi-glass tubular to process, and forms seven matrix annular grooves that spacing is arranged on the wall within it, equal mosaic electrode ring in each matrix annular groove, i.e. two exciting electrode ring E1, E2, five potential electrode ring M1, M2, M0, M3, M4.Be to guarantee measuring accuracy, should make the altitude range of matrix annular groove on the sensor inwall between 2.1mm～4.1mm, the thickness range of electrode retaining collar is between 2.0mm～4.0mm; The spacing range of potential electrode ring is 12mm, and the exciting electrode ring spacing is 64mm.
The beneficial effect of the utility model is: these seven electrod-array associated flow rate are measured conductivity sensor and are pressed seven annulus stainless steel electrodes compositions that certain distance is arranged; Wherein the outside two electrodes are exciting electrode; Middle five electrodes can constitute four measuring electrode pair (M1-M2, M2-M0, M0-M3, M3-M4), and two adjacent potential electrode are to a shared potential electrode ring, and different with traditional six electrode conductance sensors is; Its exportable U1, U2, D1, the moving signal of D2 four road electricity guided waves; Through calculating the cross correlation function of four road signals, and the result is carried out data fusion, thereby improve the precision that the downhole fluid flowing velocity is measured.
Description of drawings
Fig. 1 is the structural representation that seven electrod-array associated flow rate are measured conductivity sensor;
Fig. 2 is the structural parameters figure that seven electrod-array associated flow rate are measured conductivity sensor;
Fig. 3 is the fundamental diagram that seven electrod-array associated flow rate are measured conductivity sensor.
In Fig. 1, E1, E2 are exciting electrode, and M1, M2, M0, M3, M4 are potential electrode.In Fig. 2, electrode retaining collar internal diameter R is 14mm, every pair of potential electrode space D
mBe 12mm, the spacing of two potential electrode of its outermost is 48mm, exciting electrode E1, E2 space D
eBe 64mm, too small for the amplitude that prevents potential electrode output signal under the leakage situation, H is made as 128mm with sensor insulation tube segment length.
Embodiment
Below in conjunction with accompanying drawing the utility model is described further:
Fig. 1 is the structural representation of the utility model, and this kind is used for the seven electrod-array associated flow rate that the downhole fluid flowing velocity measures and measures conductivity sensor, is made up of sensor stand and seven stainless steel electrode rings being built in wherein.Wherein, sensor adopts the insulation plexi-glass tubular to process, and forms seven matrix annular grooves that spacing is arranged on the wall within it, equal mosaic electrode ring in each matrix annular groove, i.e. two exciting electrode ring E1, E2, five potential electrode ring M1, M2, M0, M3, M4.Be to guarantee measuring accuracy, should make the altitude range of matrix annular groove on the sensor stand inwall between 2.1 millimeters～4.1 millimeters, the thickness range of electrode retaining collar is between 2.0mm～4.0mm; The spacing range of potential electrode ring is 12mm, and the exciting electrode ring spacing is 64mm.
Fig. 2 is the structural parameters figure of the utility model, and the seven electrod-array associated flow rate measurement conductivity sensor electrode retaining collar internal diameter R that this kind is used for the measurement of downhole fluid flowing velocity is 14mm, every pair of potential electrode space D
mBe 12mm, the spacing of two potential electrode of its outermost is 48mm, exciting electrode E1, E2 space D
eBe 64mm, too small for the amplitude that prevents potential electrode output signal under the leakage situation, H is made as 128mm with sensor insulation tube segment length.
Fig. 3 is the fundamental diagram of the utility model; This kind is used for the exportable U1 of seven electrod-array associated flow rate measurement conductivity sensor, U2, D1, the moving signal of D2 four road electricity guided waves that the downhole fluid flowing velocity is measured; Through calculating the cross correlation function of four road signals; And the result carried out data fusion, thereby improve the precision that the downhole fluid flowing velocity is measured.
Claims (4)
1. the seven electrod-array associated flow rate that are used for the fluids underground fluid-velocity survey that the present invention relates to are measured conductivity sensor and it is characterized in that: 7 matrix annular grooves that spacing is arranged of processing on the sensor inwall; Inlay exciting electrode ring E1 in each matrix annular groove successively; Potential electrode ring M1, potential electrode ring M2, potential electrode ring M0; Potential electrode ring M3, potential electrode ring M4, exciting electrode ring E2.
2. measuring conductivity sensor according to the described seven electrod-array associated flow rate of claim 1 is characterized in that: the height of matrix annular groove is 2.1mm～4.1mm on the sensor inwall, and the thickness of electrode retaining collar is 2.0mm～4.0mm.
3. measuring conductivity sensor according to the described seven electrod-array associated flow rate of claim 1 is characterized in that: electrode retaining collar internal diameter R is 14mm, every pair of potential electrode space D
mBe 12mm, the spacing of two potential electrode of its outermost is 48mm, exciting electrode E1, E2 space D
eBe 64mm, too small for the amplitude that prevents potential electrode output signal under the leakage situation, H is made as 128mm with sensor insulation tube segment length.
4. seven electrod-array associated flow rate according to claim 1 are measured conductivity sensor, it is characterized in that: the sensor outer housing material is the insulation organic glass, and the material of electrode retaining collar is a stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205006947U CN202421207U (en) | 2011-12-01 | 2011-12-01 | Seven-electrode array correlated conductive sensor for measuring flow speed |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011205006947U CN202421207U (en) | 2011-12-01 | 2011-12-01 | Seven-electrode array correlated conductive sensor for measuring flow speed |
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| Publication Number | Publication Date |
|---|---|
| CN202421207U true CN202421207U (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011205006947U Expired - Fee Related CN202421207U (en) | 2011-12-01 | 2011-12-01 | Seven-electrode array correlated conductive sensor for measuring flow speed |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105629076A (en) * | 2015-12-24 | 2016-06-01 | 河海大学 | Manufacturing method of seven-electrode conductivity sensor based on MEMS silicon-glass technology |
| CN107105565A (en) * | 2017-05-02 | 2017-08-29 | 西北工业大学 | A kind of slight pressure traverse measuring device and measuring method for plasma flow control |
| CN110376399A (en) * | 2019-07-18 | 2019-10-25 | 东南大学 | The measuring system and measurement method of particle flow parameter |
-
2011
- 2011-12-01 CN CN2011205006947U patent/CN202421207U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105629076A (en) * | 2015-12-24 | 2016-06-01 | 河海大学 | Manufacturing method of seven-electrode conductivity sensor based on MEMS silicon-glass technology |
| CN105629076B (en) * | 2015-12-24 | 2018-03-06 | 河海大学 | A kind of manufacture method of the seven-electrode conductivity sensor based on MEMS silica glass techniques |
| CN107105565A (en) * | 2017-05-02 | 2017-08-29 | 西北工业大学 | A kind of slight pressure traverse measuring device and measuring method for plasma flow control |
| CN110376399A (en) * | 2019-07-18 | 2019-10-25 | 东南大学 | The measuring system and measurement method of particle flow parameter |
| CN110376399B (en) * | 2019-07-18 | 2020-11-20 | 东南大学 | Measuring system and measuring method of particle flow parameters |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20121201 |