CN102937612A - Cylindrical capacitive transducer - Google Patents
Cylindrical capacitive transducer Download PDFInfo
- Publication number
- CN102937612A CN102937612A CN 201210420238 CN201210420238A CN102937612A CN 102937612 A CN102937612 A CN 102937612A CN 201210420238 CN201210420238 CN 201210420238 CN 201210420238 A CN201210420238 A CN 201210420238A CN 102937612 A CN102937612 A CN 102937612A
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- Prior art keywords
- capacitive transducer
- transducer
- cylindrical capacitive
- cylindrical
- insulation layer
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)
Abstract
The invention relates to a machine for transmitting the output of a transducer by changing capacitance, and particularly relates to a cylindrical capacitive transducer. The cylindrical capacitive transducer is cylindrical, and is sequentially comprises an internal insulation layer, a metal layer, an external insulation layer and a metal casing from inside to outside. According to the invention, the corresponding relation between capacitance value of the cylindrical capacitive transducer and water holding ratio is good, and the transducer has resolving ability when the water holding ratio is in 0-100 percent; and static test results show that the method has good repeatability and consistency in measurement of low-flow water content of a horizontal well.
Description
Technical field
The present invention relates to a kind ofly transmit the mechanical hook-up of the output of sensing member by changing electric capacity.
Background technology
The relative dielectric constant of crude oil is 2～4, and the relative dielectric constant of water is about 80, and traditional plug-in type coaxial capacitance sensor utilizes the difference of profit specific inductive capacity, realizes measurement to water percentage by the specific inductive capacity of measuring the oil mixing with water medium.Because profit natural layering under Action of Gravity Field, sensor resolution is lower when low discharge, particularly when water percentage just lower in 50% resolution when above.Having entered at present the exploitation middle and later periods and three adopts the oil field in stage, and the flow of oil well is usually very low (less than 30 m
3/ d), Water-Content Rise is very fast, and this makes the coaxial capacitance sensor can not satisfy the needs of actual measurement.In fact, local water and tap water are good conductors, and this provides favourable condition for the tubular capacitive transducer utilizes the difference of profit conductive capability to distinguish the profit two-phase.In low production liquid horizontal well, gravitate laminar flow in pipeline behind the profit two-phase afflux flows on the water surface as the oil of lightweight phase, and in fact the height value of profit layering interfaces has reflected the size of water percentage.
Summary of the invention
The present invention aims to provide a kind of real-time detection water surface elevation and then realizes tubular capacitive transducer to the measurement of water percentage.
A kind of tubular capacitive transducer of the present invention, it is cylindric, is followed successively by from inside to outside inner insulating layer, metal level, external insulation layer and metal shell.
Preferably, metal level is an electrode.
Perhaps preferably, metal shell is connected with ground.
Tubular capacitive transducer capacitance of the present invention and water holdup have good corresponding relation, and water holdup sensor when 0%-～100% all has resolution characteristic; The static experimental result explanation is measured horizontal well low discharge water percentage with the method good repeatability and consistance.
Description of drawings
Fig. 1 is the structural representation of embodiment one.
Embodiment
Embodiment one.
The structure of tubular capacitive transducer is followed successively by inner insulating layer 4, metal level 3, external insulation layer 2 and metal shell 1 from inside to outside.Metal level 3 is an electrode, with 1 insulation of its encapsulation process and shell and draw wire and be convenient to external voltage, shell 1 ground connection.Whole sensor is cylindric, and fluid is in the sensor internal axia flow.
In the requirement that guarantees in-site measurement intensity simultaneously, every layer thickness all should be as far as possible little, and purpose is to increase width of flow path, is convenient to fluid layering and flows, and increases the measurable flow weight range.In addition, inner insulating layer 4 is thinner, and the responding range of sensor is larger.
Claims (3)
1. a tubular capacitive transducer is characterized in that it is cylindric, is followed successively by from inside to outside inner insulating layer (4), metal level (3), external insulation layer (2) and metal shell (1).
2. tubular capacitive transducer as claimed in claim 1 is characterized in that metal level (3) is an electrode.
3. tubular capacitive transducer as claimed in claim 1 or 2 is characterized in that metal shell (1) is connected with ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210420238 CN102937612A (en) | 2012-10-29 | 2012-10-29 | Cylindrical capacitive transducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201210420238 CN102937612A (en) | 2012-10-29 | 2012-10-29 | Cylindrical capacitive transducer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102937612A true CN102937612A (en) | 2013-02-20 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201210420238 Pending CN102937612A (en) | 2012-10-29 | 2012-10-29 | Cylindrical capacitive transducer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102937612A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107422000A (en) * | 2017-06-19 | 2017-12-01 | 天津大学 | Biphase gas and liquid flow plays rotation split-phase type electric capacity moisture percentage measuring apparatus |
| CN108167632A (en) * | 2017-12-21 | 2018-06-15 | 新兴铸管（浙江）铜业有限公司 | Tandem mill Lubricating-oil Station pollution prewarning governing system and method |
| CN110568030A (en) * | 2019-09-16 | 2019-12-13 | 燕山大学 | coaxial capacitance-impedance integrated sensor and circuit system thereof |
| CN110821474A (en) * | 2019-11-18 | 2020-02-21 | 燕山大学 | Integrated forming water content measuring sensor |
-
2012
- 2012-10-29 CN CN 201210420238 patent/CN102937612A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107422000A (en) * | 2017-06-19 | 2017-12-01 | 天津大学 | Biphase gas and liquid flow plays rotation split-phase type electric capacity moisture percentage measuring apparatus |
| CN108167632A (en) * | 2017-12-21 | 2018-06-15 | 新兴铸管（浙江）铜业有限公司 | Tandem mill Lubricating-oil Station pollution prewarning governing system and method |
| CN110568030A (en) * | 2019-09-16 | 2019-12-13 | 燕山大学 | coaxial capacitance-impedance integrated sensor and circuit system thereof |
| CN110821474A (en) * | 2019-11-18 | 2020-02-21 | 燕山大学 | Integrated forming water content measuring sensor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20130220 |