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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Abstract
The utility model discloses a seven-electrode array correlated conductive sensor for measuring flow speed, which is used for measuring the flow speed of underground fluid. The conductive sensor is characterized in that seven spaced concave annular grooves are machined on the inner wall of the sensor; and an excitation electrode ring E1, a measurement electrode ring M1, a measurement electrode ring M2, a measurement electrode ring M0, a measurement electrode ring M3, a measurement electrode ring M4 and an excitation electrode ring E2 are sequentially embedded into each concave annular groove. The utility model aims to solve the problem that the conventional seven-electrode array correlated conductive sensor for measuring flow speed is low in precision of measuring the flow speed of the fluid in a perpendicular pipeline. The sensor can output four paths of conductive fluctuation signals, calculates correlation functions of the four paths of signals and fuses data according to results, so that the precision of measuring the flow speed of the underground fluid is 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 |
Applications Claiming Priority (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 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202421207U true CN202421207U (en) | 2012-09-05 |
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Family Applications (1)
| 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 |
Country Status (1)
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| CN (1) | CN202421207U (en) |
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 for 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 |