CN202483554U - Oil well produced-fluid optical fiber measuring system - Google Patents

Oil well produced-fluid optical fiber measuring system Download PDF

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Publication number
CN202483554U
CN202483554U CN2012201240600U CN201220124060U CN202483554U CN 202483554 U CN202483554 U CN 202483554U CN 2012201240600 U CN2012201240600 U CN 2012201240600U CN 201220124060 U CN201220124060 U CN 201220124060U CN 202483554 U CN202483554 U CN 202483554U
Authority
CN
China
Prior art keywords
optical fiber
optical
oil well
signal processing
venturi tube
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.)
Expired - Fee Related
Application number
CN2012201240600U
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Chinese (zh)
Inventor
刘庆强
曹茂俊
肖红
刘均
王永安
殷海双
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.)
Northeast Petroleum University
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Northeast Petroleum University
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 Northeast Petroleum University filed Critical Northeast Petroleum University
Priority to CN2012201240600U priority Critical patent/CN202483554U/en
Application granted granted Critical
Publication of CN202483554U publication Critical patent/CN202483554U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model relates to an oil well fluidproduced-fluid optical fiber measuring system, comprising a laser emitter, an optical coupler, a Venturi tube, an optical fiber probe, an optical fiber pressure sensor, an optical detecting device, a signal processing device, and a computer, wherein the laser emitter, the optical coupler, the optical detecting device and the signal processing device are arranged on the ground; the Venturi tube is arranged in an oil pipe; the optical fiber probe is arranged in the Venturi tube; the optical coupler is connected with the optical fiber probe by an optical fiber; the optical fiber pressure sensor is located on the end of the optical fiber probe; the optical coupler is further connected with the optical detecting device; the optical detecting device is connected with the signal processing device; and the signal processing device is connected with the computer. The oil well fluidproduced fluid optical fiber measuring system has the advantages of high detecting sensitivity, high property in resisting electromagnetic interference, low affect from medium temperature and high response speed; the fluid production situation of the single oil well is measured without affecting the production of the oil well, so that the practicability is high and the measuring precision is high.

Description

Oil well liquid-producing optical fiber metering system
Technical field:
The utility model relates to the metering device of measuring oil well liquid-producing, what be specifically related to is oil well liquid-producing optical fiber metering system.
Background technology:
It is traditional gas dosing method that orifice plate is surveyed gas, and with restricting orifice and the bellows differential manometer is supporting measures, the pressure reduction of front and back calculates gas flow when flowing through the orifice plate throttling according to gas.This metering device is simple in structure, and is easy for installation, but range is less, has only 1:3, and measuring accuracy receives the influence of orifice plate installation and processing precision.
The gas Roots type flowmeter is a kind of volumetric flowmeter, and measuring accuracy is higher, is applicable to accurate cubing, is widely used in trade and accurate accumulating management through quantification.But isolated natural gas contains more drop in oil well measurement, and this can influence the lubricated of Flux meter rotation mechanism, occurs card, stifled accident easily, so generally should not adopt this type of flow meter.
The oil field is in high water-cut stage at present, and very difficult for the discharge opeing behind the low oil well measurement of gas liquid ratio, original one-well metering method error is increasing, is unfavorable for the fine-grained management of oil well.
Summary of the invention:
The purpose of the utility model provides oil well liquid-producing optical fiber metering system, and it is used to solve the big problem of existing oil well liquid-producing one-well metering method error.
The utility model solves the technical scheme that its technical problem adopted: this oil well liquid-producing optical fiber metering system comprises generating laser, photo-coupler, Venturi tube, fibre-optical probe, fibre optic compression sensor, optical detection device, signal processing apparatus, computer, and generating laser, photo-coupler, optical detection device, signal processing apparatus are installed on the ground; Venturi tube is arranged in the oil pipe; Fibre-optical probe is installed in the Venturi tube; Photo-coupler connects fibre-optical probe through optical fiber, and fibre optic compression sensor is positioned at the end of fibre-optical probe, and photo-coupler also is connected with optical detection device; Optical detection device connects signal processing apparatus, and signal processing apparatus connects computer.
Venturi tube is by the access cylindrical section in the such scheme, the circular cone contraction section, and cylindrical throat and conical diffuser are formed, and the diameter of inlet cylindrical section is identical with pipe aperture, has pressure port on this section, and cylindrical throat has the negative pressure pressure port.
Computer connects printer in the such scheme, can the continuous data printout be come out through printer.
The utlity model has following beneficial effect:
1, the utility model detection sensitivity is high, and anti-electromagnetic interference capability is strong, and it is little influenced by medium temperature, and response speed is fast, can have very strong practicality in the production fluid situation that does not influence kinetic measurement oil well individual well under the situation that the oil gas well produces, and certainty of measurement is high.
2, simple, the no plug-in unit of venturi tubular structure in the utility model does not disturb fluid to flow, crushing is little, receive the physical properties of fluids variable effect little, is convenient to implement, safe and reliable, is fit to the downhole flow metering and controls.
Description of drawings
Fig. 1 is the structured flowchart of the utility model;
Fig. 2 is the structural representation of Venturi tube in the utility model.
1. inlet cylindrical section, 2. circular cone contraction section, 3. cylindrical throat, 4. conical diffuser, 5. outlet cylindrical section 6 pressure ports 7 negative pressure pressure ports.
The specific embodiment
Below in conjunction with accompanying drawing the utility model is done further explanation:
As shown in Figure 1; This oil well liquid-producing optical fiber metering system comprises generating laser, photo-coupler, Venturi tube, fibre-optical probe, fibre optic compression sensor, optical detection device, signal processing apparatus, computer, and generating laser, photo-coupler, optical detection device, signal processing apparatus are installed on the ground; Venturi tube is arranged in the underground oil pipe, and fibre-optical probe is installed in the Venturi tube, and photo-coupler connects fibre-optical probe through high temperature optical fiber; Fibre optic compression sensor is positioned at the end of fibre-optical probe; Photo-coupler also is connected with optical detection device, and optical detection device connects signal processing apparatus, and signal processing apparatus connects computer; Computer connects printer, and optical detection device adopts laser detecting apparatus.
As shown in Figure 2, Venturi tube is by inlet cylindrical section 1, circular cone contraction section 2; Cylindrical throat 3 and conical diffuser 4, outlet cylindrical section 5 is formed, and the diameter of inlet cylindrical section 1 is identical with pipe aperture; Have pressure port 6 on this section, cylindrical throat 3 has negative pressure pressure port 7.Venturi tube is utilized the differential pressure of throttling arrangement front and back and the relation of mean flow rate and flow; According to differential pressure measurement value calculated flow rate, when flow of liquid in the pipeline during through Venturi tube, the flow section shrinks; Flow velocity increases at the necked-down section place; Pressure reduces, and makes the Venturi tube front and back produce pressure reduction, again according to the pressure reduction calculation flow rate that records.
Generating laser is used to produce powerful stabilized lasers signal; Send into photo-coupler, send into the high temperature optical fiber of ground to down-hole through photo-coupler, the down-hole part adopts the Venturi tube of variation to be equipped with optical fiber pressure and measures; Because Venturi tube is placed on oil pipe inside; Utilize tubing wall, and be designed to the protruding throttle style in middle part, reduced eddy current; Fibre optic compression sensor is positioned at optical fiber end; Optical fiber is the transmission line of light; Measured physical quantity is for conversion into the amplitude of light; Phase place or oscillation amplitude change are surveyed data through fibre optic compression sensor and optical fiber with institute and are passed to ground, through optical detection device, signal processing apparatus, computer institute are surveyed data transaction again and become each phase flow rate data.

Claims (3)

1. oil well liquid-producing optical fiber metering system; It is characterized in that: this oil well liquid-producing optical fiber metering system comprises generating laser, photo-coupler, Venturi tube, fibre-optical probe, fibre optic compression sensor, optical detection device, signal processing apparatus, computer, and generating laser, photo-coupler, optical detection device, signal processing apparatus are installed on the ground; Venturi tube is arranged in the oil pipe; Fibre-optical probe is installed in the Venturi tube; Photo-coupler connects fibre-optical probe through optical fiber, and fibre optic compression sensor is positioned at the end of fibre-optical probe, and photo-coupler also is connected with optical detection device; Optical detection device connects signal processing apparatus, and signal processing apparatus connects computer.
2. oil well liquid-producing optical fiber metering system according to claim 1; It is characterized in that: described Venturi tube is by the access cylindrical section; Circular cone contraction section (2), cylindrical throat (3) and conical diffuser (4) are formed, and the diameter of inlet cylindrical section (1) is identical with pipe aperture; Have pressure port (6) on this section, cylindrical throat has negative pressure pressure port (7).
3. oil well liquid-producing optical fiber metering system according to claim 1 is characterized in that: described computer connects printer.
CN2012201240600U 2012-03-29 2012-03-29 Oil well produced-fluid optical fiber measuring system Expired - Fee Related CN202483554U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012201240600U CN202483554U (en) 2012-03-29 2012-03-29 Oil well produced-fluid optical fiber measuring system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012201240600U CN202483554U (en) 2012-03-29 2012-03-29 Oil well produced-fluid optical fiber measuring system

Publications (1)

Publication Number Publication Date
CN202483554U true CN202483554U (en) 2012-10-10

Family

ID=46957981

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2012201240600U Expired - Fee Related CN202483554U (en) 2012-03-29 2012-03-29 Oil well produced-fluid optical fiber measuring system

Country Status (1)

Country Link
CN (1) CN202483554U (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103628860A (en) * 2013-11-01 2014-03-12 中国科学院力学研究所 Optical fiber sensor for measuring gas water distribution in coal-bed gas well shaft
CN106323393A (en) * 2016-08-31 2017-01-11 电子科技大学 Dual mode micro liquid flowmeter based on light manipulation
CN106460502A (en) * 2014-05-08 2017-02-22 光学感应器控股有限公司 Fluid inflow

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103628860A (en) * 2013-11-01 2014-03-12 中国科学院力学研究所 Optical fiber sensor for measuring gas water distribution in coal-bed gas well shaft
CN106460502A (en) * 2014-05-08 2017-02-22 光学感应器控股有限公司 Fluid inflow
US10422677B2 (en) 2014-05-08 2019-09-24 Optasense Holdings Limited Fluid inflow
CN106460502B (en) * 2014-05-08 2019-12-17 光学感应器控股有限公司 Inflow of fluid
CN106323393A (en) * 2016-08-31 2017-01-11 电子科技大学 Dual mode micro liquid flowmeter based on light manipulation
CN106323393B (en) * 2016-08-31 2018-12-18 电子科技大学 A kind of double mode micro liquid flowmeter based on light manipulation

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GR01 Patent grant
C17 Cessation of patent right
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20121010

Termination date: 20140329