CN102937612A - Cylindrical capacitive transducer - Google Patents

Cylindrical capacitive transducer Download PDF

Info

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
Authority
CN
China
Prior art keywords
capacitive transducer
transducer
cylindrical capacitive
cylindrical
insulation layer
Prior art date
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.)
Pending
Application number
CN 201210420238
Other languages
Chinese (zh)
Inventor
王耀斌
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
SHAANXI ALLIANCE LOGISTICS CO Ltd
Original Assignee
SHAANXI ALLIANCE LOGISTICS CO Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by SHAANXI ALLIANCE LOGISTICS CO Ltd filed Critical SHAANXI ALLIANCE LOGISTICS CO Ltd
Priority to CN 201210420238 priority Critical patent/CN102937612A/en
Publication of CN102937612A publication Critical patent/CN102937612A/en
Pending legal-status Critical Current

Links

Landscapes

  • 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

A kind of tubular capacitive transducer
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.
CN 201210420238 2012-10-29 2012-10-29 Cylindrical capacitive transducer Pending CN102937612A (en)

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

ID=47696523

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)

* Cited by examiner, † Cited by third party
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 A coaxial capacitive impedance integrated sensor and its circuit system
CN110821474A (en) * 2019-11-18 2020-02-21 燕山大学 Integrated forming water content measuring sensor

Cited By (4)

* Cited by examiner, † Cited by third party
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 A coaxial capacitive impedance integrated sensor and its circuit system
CN110821474A (en) * 2019-11-18 2020-02-21 燕山大学 Integrated forming water content measuring sensor

Similar Documents

Publication Publication Date Title
Zhai et al. Liquid holdup measurement with double helix capacitance sensor in horizontal oil–water two-phase flow pipes
CN105387909B (en) Voltage output mode fuel-quantity transducer
CN102147385B (en) Multi-phase flow measuring methods based on single-section impedance long-waist internal cone sensor
CN102937612A (en) Cylindrical capacitive transducer
CN101324186A (en) A phase holdup measurement device for oil-gas-water three-phase flow
CN203337591U (en) Multi-column moisture content measurement capacitive sensor
CN101865873B (en) Capacitance-conductivity tester for water content of crude oil
CN102239392A (en) Improvements in or relating to level sensors
CN110568030A (en) A coaxial capacitive impedance integrated sensor and its circuit system
CN202837223U (en) Cylindrical capacitance sensor
CN104101730B (en) Measuring method of moving velocity and length of oil-gas two-phase flow plug based on capacitive detection device
CN101393461A (en) Radio frequency admittance admittance level controller
CN109869136B (en) Land single-wellhead oil-water two-phase flow resistance capacitance water content measuring device
CN101182770B (en) Capacitance-type sensor used for horizontal well moisture percentage measurement
CN103353324B (en) A kind of self-alignment capacitance level transducer
CN201689071U (en) Capacitance electroconductive tester for water content of crude oil
CN104568073A (en) Hall liquid level detection device
CN103674169A (en) Method for automatically measuring pipe-free embedded type groundwater level and water level changes
CN204188237U (en) Hall liquid level pick-up unit
Lusheng et al. The finite element analysis for parallel-wire capacitance probe in small diameter two-phase flow pipe
CN104100260A (en) Lumped sensing system for two-phase flow in annular space
CN201984053U (en) Novel raw oil water content detecting sensor
CN206074475U (en) Crude oil water content measurement apparatus based on radio frequency method
CN216695176U (en) Liquid level measurement sensor based on interdigital capacitor
RU2439504C2 (en) Oil-water flow interface position meter

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