CN1188892A - Electromagnetic flowmeter - Google Patents
Electromagnetic flowmeter Download PDFInfo
- Publication number
- CN1188892A CN1188892A CN97107334A CN97107334A CN1188892A CN 1188892 A CN1188892 A CN 1188892A CN 97107334 A CN97107334 A CN 97107334A CN 97107334 A CN97107334 A CN 97107334A CN 1188892 A CN1188892 A CN 1188892A
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- Prior art keywords
- detector
- flow
- electromagnetic flowmeter
- fluid
- measuring
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- 238000007789 sealing Methods 0.000 claims description 2
- 239000012530 fluid Substances 0.000 abstract description 28
- 238000005259 measurement Methods 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000002347 injection Methods 0.000 abstract 2
- 239000007924 injection Substances 0.000 abstract 2
- 230000035945 sensitivity Effects 0.000 abstract 1
- 239000000523 sample Substances 0.000 description 12
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 7
- 230000006698 induction Effects 0.000 description 4
- 230000005415 magnetization Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000003129 oil well Substances 0.000 description 1
- 230000001235 sensitizing effect Effects 0.000 description 1
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- Measuring Volume Flow (AREA)
Abstract
The electromagnetic flowmeter is an external flow channel type electromagnetic flowmeter with one or more pairs of electrodes of detector set on the external wall of detector cylinder. When the flowmeter is used for measuring the injection profile of the water injection well, a flow gathering device is not needed to be added, and the fluid speed and the fluid flow outside the detector are directly measured, so that the flow measurement process of the fluid is simplified. The external flow channel type electromagnetic flowmeter is not only suitable for measuring the underground flow, but also suitable for measuring the ground flow, and is particularly suitable for measuring the flow of high-viscosity fluid. The device has the advantages of simple structure, convenient use, high measurement precision and high sensitivity.
Description
The present invention relates to a kind of flow rate-measuring device of electromagnetic type.
At present, inner flow passage formula electromagnetic flowmeter has appeared at market, and is used widely in pipeline fluid is measured.
What the application for a patent for invention " underground electromagnetic flow meter " (application for a patent for invention 96117840.X) that my unit proposes was narrated is the flow measurement that electromagnetic flowmeter is used for the down-hole, oil field, this contrive equipment adopts the detector and the non-single flow water inlet flow channel structure of isobaric cabin structure form, is applicable to High Voltage, small size space and any water quality situation.But because its driving magnetic field and induction field all concentrate on measuring sonde (detector) inside of hollow, fluid must be in the middle sensitive spatial flow mistake of measuring sonde, just can measure, thereby use this electromagnetic flowmeter when underground survey, must add corresponding conflux device so that the current conflux, thereby be not suitable for just can not using under the situation of conflux at some.
The object of the present invention is to provide a kind ofly can be applicable to High Voltage, small size space, any water quality situation, and do not need the electromagnetic flowmeter of additional any conflux device, and be particularly suitable for the high viscosity fluid downhole flow and measure.
The invention is characterized in and adopt outer flow passage formula electromagnetic flow-measurement device, the magnetic pole of flowmeter detector is arranged on detector inside, and magnetic field extends to the outer proximity space of detector, and the measurement of inductance electrode extends to the barrel outside of detector.
The present invention is achieved in that
Outer flow passage formula electromagnetic flowmeter of the present invention, monnolithic case as shown in Figure 1, integral body is an O-ring tubular, comprising: detector 1, circuit 2, rope socket 3 and surface instrumentation 4.Detector 1, circuit 2, rope socket 3 also can be collectively referred to as probe.
One or more pairs of driving magnetic poles (coil+iron core) are installed in sealing in the measurement detector of this flowmeter, exterior shield is not established in magnetic field, thereby extend to the outer proximity space of detector, the measurement induction electrode of corresponding quantity is symmetrically distributed between the magnetic pole, measure the induced electricity cartridge and pass the detector barrel, be arranged in the fluid course in the barrel outside, circuit 2 also seals and is installed in the cylinder of measuring sonde, the other end of circuit 2 rope socket 3 that is tightly connected, rope socket 3 connects surface instrumentation 4 by cable.Like this, whole measuring sonde is a sealed cylindrical.
The electrode tip of this flowmeter survey flow stretches out outside the probe detection device cylindrical wall, the sensitive space of its measurement is in the measuring sonde outside, constituted outer flow passage formula electromagnetic flowmeter, on probe, any water inlet duct need not be set, also need not change fluid course, just can directly measure as long as put into fluid course to be measured.
In the down-hole, fluid is to flow at oil pipe that injects well or sleeve pipe, and this flowmeter is sent into by cable in the sleeve pipe of down-hole, and the probe position is in the position, middle measurements sensitive volume of tested pipeline, and promptly detected fluid is between flow probe outer wall and the sleeve pipe.When the detector interior loop is fed exchange current, made iron core when magnetization by circuit, the flowmeter probe portion just produces alternating magnetic field, shielding is not established in magnetic field, alternating magnetic field extends to the space outerpace of detector like this, thereby between two electrodes, generate the electric signal that is directly proportional with the sensitive volume flow velocity, after by circuit 2 electric signal being handled, by cable transmission to ground, again by the surface instrumentation record.
Flowmeter of the present invention is except that adopting conventional pair of electrodes and magnetic pole mode, also can adopt two pairs, three pairs, how right electrode and the magnetic pole pattern of four equities, make electromagnetic flowmeter control and to select to measure the useful space size of sensitive volume, best satisfy technical requirement, improve measuring accuracy.
When this electromagnetic flowmeter is used for the oil field underground survey; for prevent that being exposed to the outer electrode of measuring sonde is damaged by collision in the process of going into the well; can add the Machine guarding of movable (radially opening or axial displacement); this attachment device is guard electrode in upper and lower well process, leaves electrode when flowmeter survey.
Electromagnetic flowmeter of the present invention is compared with electromagnetic flowmeter in the past and is had the following advantages:
1. electromagnetic flowmeter of the present invention will be measured the outer wall that induction electrode extends to the probe detection device, be located immediately in the fluid course, need not add any conflux device just can directly measure, measuring process is simple, reliability is high, good to the adaptability of subsurface environment condition, the input profile that can be used as " system annotate well " is measured;
2. the outer flow passage formula is measured, and need not change the runner of annotating well fluids, is suitable for ground and downhole fluid flow measurement, the measurement of suitable especially high viscosity fluid;
3. designed manyly to magnetic pole and electrode, may command is measured the size and the scope of sensitizing range, can improve measuring accuracy effectively.
The present invention is described in further detail with reference to the accompanying drawings below.
Fig. 1 is that the integral body of electromagnetic flowmeter of the present invention is formed synoptic diagram;
Fig. 2 is relative position and the working method figure of electromagnetic flowmeter of the present invention in the downhole fluid pipeline;
Fig. 3 is the detector diagrammatic cross-section of the embodiment of the invention 1;
Fig. 4 is the detector diagrammatic cross-section of the embodiment of the invention 2;
Fig. 2 has shown relative position and the metering system of electromagnetic flowmeter of the present invention in fluid line. Figure In, flowmeter probe 6 is in the centre position of detected fluid pipeline, and detected fluid 7 is in the probe outer tube Between wall 12 and the oil well casing 5, this probe must not arrange detected fluid and enter hole and runner, because probe The electrode tip of segment detector passes the probe outer wall and is arranged in fluid course, the sensitive detector 1 that induces, The variation of the rate of flow of fluid of space outerpace, behind coil electricity, electrode tip will be with the flow that directly records The signal of telecommunication is sent to circuit 2, is transferred to the ground instrument record by rope socket 3 stube cables again, finishes survey Amount work.
Embodiment 1:
Fig. 1 is the monnolithic case synoptic diagram of electromagnetic flowmeter of the present invention.
This device is a drum, is generally metal cylinder, comprising: detector 1, circuit 2, rope socket 3 and surface instrumentation 4.
The driving magnetic pole of detector and electrode, circuit 2 and rope socket 3 are sealed successively to be installed in the cylinder, totally is a sealed cylindrical.
Present embodiment is one two an electric pole type outer flow passage electromagnetic flowmeter, Fig. 3 is the diagrammatic cross-section of two electric pole types (being pair of electrodes) measuring sonde detector, a pair of magnetic pole (being made up of coil 8 and iron core 9) and pair of electrodes 10 are set in the detector, exterior shield is not established in magnetic field, thereby extend to the outer proximity space of detector, electrode tip 10 passes barrel, extend to drum outer wall 12, be located immediately in the fluid course, when coil 8 feeds exchange current, when making iron core 9 magnetization, near measuring sonde space outerpace 11 produces alternating magnetic field, thereby generates the electric signal that is directly proportional with the sensitive volume flow velocity between two electrodes 10, and electric signal is handled through circuit 2, be transferred to ground by rope socket 3 stube cables, by the surface instrumentation record.
Embodiment 2:
Present embodiment electromagnetic flowmeter monnolithic case and structure are identical with embodiment 1.
Present embodiment is four electric pole type outer flow passage electromagnetic flowmeters.
Fig. 4 is four electric pole type measuring sonde detector diagrammatic cross-sections.Four magnetic poles 13 (each magnetic pole all is made up of coil and iron core) are set in detector, exterior shield is not established in magnetic field, thereby extend to the outer proximity space of detector, the magnetic pole of two same polarities is installed in opposite side, measures induction electrode 14 (totally four) and is symmetrically distributed between the magnetic pole.Electrode tip passes barrel, extend to drum outer wall 12, be located immediately in the fluid course, when coil feeding exchange current, the drive current in the detector makes the magnetization of magnetic pole low-frequency alternating, and near the space outerpace 11 the measuring sonde detector produces alternating magnetic fields, thereby between adjacent in twos electrode, generate the electric signal that is directly proportional with the sensitive volume flow velocity, electric signal is handled through circuit 2, is transferred to ground by rope socket 3 stube cables, by the surface instrumentation record.
Present embodiment many to electrode and many settings to magnetic pole make outer flow passage formula electromagnetic flowmeter can control and select the size of the useful space of measuring the sensitive volume, best have satisfied the measuring technique requirement.
Electromagnetic flowmeter of the present invention is not only applicable to the downhole fluid flow measurement, and is suitable for the fluid flow mensuration of any environment in ground, the flow measurement of suitable especially high viscosity fluid.
Claims (4)
1. an electromagnetic flowmeter comprises detector and Circuits System, it is characterized in that the magnetic pole that is provided with in the detector does not have outside magnetic shielding, potential electrode in detector outside.
2. electromagnetic flowmeter according to claim 1 is characterized in that the magnetic pole of detector can be one or more pairs of.
3. electromagnetic flowmeter according to claim 1 is characterized in that the potential electrode sealing is installed on the detector barrel, and the electrode tip of potential electrode extends to the detector barrel outside.
4. electromagnetic flowmeter according to claim 3 is characterized in that the potential electrode of detector can be one or more pairs of.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97107334A CN1188892A (en) | 1997-01-21 | 1997-01-21 | Electromagnetic flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97107334A CN1188892A (en) | 1997-01-21 | 1997-01-21 | Electromagnetic flowmeter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1188892A true CN1188892A (en) | 1998-07-29 |
Family
ID=5169468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97107334A Pending CN1188892A (en) | 1997-01-21 | 1997-01-21 | Electromagnetic flowmeter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1188892A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107831334A (en) * | 2017-11-27 | 2018-03-23 | 浙江星天海洋科学技术有限公司 | Two-dimensional vector flow sensor |
-
1997
- 1997-01-21 CN CN97107334A patent/CN1188892A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107831334A (en) * | 2017-11-27 | 2018-03-23 | 浙江星天海洋科学技术有限公司 | Two-dimensional vector flow sensor |
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