CN113054400A - Omnidirectional RFID antenna device for controlling petroleum underground tool - Google Patents
Omnidirectional RFID antenna device for controlling petroleum underground tool Download PDFInfo
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- CN113054400A CN113054400A CN202110309726.3A CN202110309726A CN113054400A CN 113054400 A CN113054400 A CN 113054400A CN 202110309726 A CN202110309726 A CN 202110309726A CN 113054400 A CN113054400 A CN 113054400A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/2208—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems
- H01Q1/2216—Supports; Mounting means by structural association with other equipment or articles associated with components used in interrogation type services, i.e. in systems for information exchange between an interrogator/reader and a tag/transponder, e.g. in Radio Frequency Identification [RFID] systems used in interrogator/reader equipment
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10158—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves methods and means used by the interrogation device for reliably powering the wireless record carriers using an electromagnetic interrogation field
- G06K7/10178—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves methods and means used by the interrogation device for reliably powering the wireless record carriers using an electromagnetic interrogation field including auxiliary means for focusing, repeating or boosting the electromagnetic interrogation field
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10297—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves arrangements for handling protocols designed for non-contact record carriers such as RFIDs NFCs, e.g. ISO/IEC 14443 and 18092
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
- G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
- G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
- G06K7/10009—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves
- G06K7/10316—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers
- G06K7/10336—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation sensing by radiation using wavelengths larger than 0.1 mm, e.g. radio-waves or microwaves using at least one antenna particularly designed for interrogating the wireless record carriers the antenna being of the near field type, inductive coil
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- Physics & Mathematics (AREA)
- Toxicology (AREA)
- Health & Medical Sciences (AREA)
- Electromagnetism (AREA)
- General Health & Medical Sciences (AREA)
- Computer Networks & Wireless Communication (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- General Physics & Mathematics (AREA)
- Theoretical Computer Science (AREA)
- Computer Security & Cryptography (AREA)
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Abstract
The invention discloses an omnidirectional RFID antenna device for controlling a petroleum underground tool, which realizes a three-dimensional combined coil antenna of an omnidirectional RFID reader-writer by constructing a plurality of sub-loops, has the working frequency of 125KHz or 134.2KHz suitable for underground metal and liquid environments, and is wound on an antenna framework in a tubular form to be installed in an underground metal pipe sleeve. The invention uses the multi-sub-loop combined antenna to generate magnetic fields in X, Y and Z directions, compared with the one-way solenoid antenna adopted by the existing underground RFID system, the problem of read-write directivity caused by rolling of the underground RFID label along with the high-speed flow of the medium can be solved, and the reliability of the underground RFID system can be effectively improved.
Description
Technical Field
The invention relates to the technical field of energy exploitation equipment, in particular to an omnidirectional RFID antenna device for controlling an oil downhole tool.
Background
With the increasing development of deep wells and ultra-deep wells, conventional downhole tools and related technologies in well drilling and completion and well cementing operations cannot completely meet the field requirements. As a new technology, RFID (Radio Frequency Identification) for transmitting control data in a non-contact way through an electronic tag is expected to provide a brand-new way for efficient and low-cost control of downhole tools and complete operations which cannot be completed by some traditional tools. The antenna of the reader-writer and the metal drill rod are coaxially arranged, and when an electronic tag carrying a ground control instruction moves to an antenna area along with fluid in a well, RFID communication is carried out to obtain the control instruction to drive the downhole tool to act.
The RFID technology has very wide application prospect in the aspect of underground measurement control in the field of petroleum engineering and can bring huge economic benefits. However, the complex application environment in the well can cause non-negligible influence on the RFID system, and greatly weaken the communication performance of the RFID system. The antenna is used as a coupling carrier for realizing energy transfer and data interaction between a reader and an electronic tag in the RFID system, and the structure and the characteristics of the antenna play a key role in the performance of the RFID system. In the prior art, US 7063148, chinese patents 201010513415, 201110171527, 201510726490, 201610061009, 201811443692 disclose an RFID system for petroleum downhole data communication, wherein an RFID reader employs a solenoid antenna that mainly generates an axial magnetic field for activating an RFID tag to complete data communication. However, the electronic tag inevitably rolls along with the high-speed flow of the medium in the well, and when the tag is perpendicular or approximately perpendicular to the axis of the reader-writer antenna, the induced voltage of the tag antenna is approximately zero, which causes the problem of read-write directivity and affects the reliability of the RFID communication. In order to solve the problem, Chinese patents 201610068814 and 201610361559 improve an underground RFID electronic tag antenna, the former uses three coils which are respectively parallel to XY, XZ and YZ planes, and the latter stabilizes the operation posture of the tag through a counterweight to avoid the problem of reading and writing directivity, but the two methods can cause the volume of the tag to be overlarge and cannot meet the requirement of underground narrow space.
Disclosure of Invention
The present invention is directed to solving the above problems by providing an omni-directional RFID antenna device for use in petroleum downhole tool control. The antenna is suitable for improving the directivity of the petroleum underground RFID reader-writer antenna, improving the communication performance of an underground RFID system, realizing the reading of all directions and positions of an RFID label and avoiding the occurrence of RFID reading-writing blind areas. The omnidirectional reading of the tag can be realized in a complex underground environment.
The invention realizes the purpose through the following technical scheme:
the invention relates to an omnidirectional RFID reader-writer antenna device for controlling an oil downhole tool, which has the working frequency of 125KHz or 134.2KHz suitable for metal and liquid environments in a well, and is used for constructing a plurality of sub-loops, wherein each sub-loop has opposite phase currents and generates magnetic fields in three directions of X, Y and Z, so that when an underground RFID electronic tag moves to an antenna area of the underground reader-writer along with a fluid medium in the well, the underground RFID electronic tag can be reliably read in all directions.
The RFID reader-writer antenna is a three-dimensional combined coil antenna, a single sub-loop is rectangular, and the single sub-loop is wound and bent on the outer surface of a tubular antenna framework to form a tubular form, so that coaxial installation with an underground metal pipeline is realized.
The RFID reader-writer antenna consists of 4, 5, 6 and more sub-loops. The spatial magnetic field distribution of the odd-numbered sub-loop combined coil antenna is better than that of the even-numbered sub-loop combined coil antenna.
The length of the RFID reader-writer antenna is determined according to the running speed of the underground electronic tag and the time for reading the tag information. The inner diameter of the antenna is designed by taking the inductance maximization as an optimization target, the demodulation capacity of a detection circuit of the reader-writer is improved, and the performance of the underground reader-writer is improved.
The invention has the beneficial effects that:
compared with the prior art, the omnidirectional RFID antenna device for controlling the petroleum underground tool adopts a multi-loop complementary structure, so that a read-write blind area cannot occur in the internal space of the antenna, the space magnetic field intensity generated by the antenna of a reader-writer is improved, and the tag reading capability of the reader-writer is further enhanced. The problem of reading and writing directivity caused by the fact that the underground RFID label rolls when flowing along with the medium can be effectively solved, and the reliability of an underground RFID system is improved.
Drawings
FIG. 1 is a schematic diagram of implementing opposing currents in adjacent sub-loops;
FIG. 2 is a schematic diagram of a reader/writer combined antenna structure composed of 4 sub-loops;
fig. 3 is a schematic diagram of a reader/writer combined antenna structure composed of 5 sub-loops.
Detailed Description
The invention will be further described with reference to the accompanying drawings in which:
as shown in fig. 1, fig. 1 and 2 are two adjacent sub-loop structures, two wires 31 and 32 are present in the common part 3 of the adjacent sub-loops, and current flows through the sub-loop 1 to the sub-loop 2 through the wire 32, and flows through the other wire 31 when flowing through the rest of the antenna and flows from the sub-loop 2 back to the sub-loop 1. Thus, the adjacent sub-loops 1 and 2 will generate opposite phase currents, and the magnetic fields generated by the two loops will be effectively superposed.
Fig. 2 shows a reader/writer combined antenna structure consisting of 4 sub-loops (41, 42, 43, 44). All adjacent sub-loops have opposite phase currents and provide magnetic fields in the X, Y and Z directions together. The magnetic field distribution is illustrated by taking the 0 degree, 45 degree and 90 degree included angles between the label and the horizontal direction as examples. At 0 deg., the tag coil is parallel to sub-loops 41 and 43 and perpendicular to sub-loops 42 and 44, and the total mutual inductance is the sum of the mutual inductances of sub-loops 42 and 44 to the tag antenna. At 45 deg., each sub-loop will have a portion of its magnetic induction line passing through the tag coil, creating mutual inductance, which may be at a maximum. At 90 deg., the tag is parallel to sub-loops 42 and 44, and perpendicular to sub-loops 41 and 43, and the total mutual inductance is the sum of the mutual inductances of sub-loops 41 and 43 to the tag antenna. The mutual inductance sum of each coil to the tag is obtained at other angles as above, but for the reader-writer antenna structure consisting of 4 sub-loops, partial magnetic fields in the center-most area of the antenna are offset, and the center magnetic field has the minimum value.
Fig. 3 shows a reader/writer combined antenna structure consisting of 5 sub-loops. Also all adjacent sub-loops will have opposite phase currents. Because the structure is not symmetrical, the magnetic field in the central area is less offset, at least 4 sub-loop magnetic fields can be superposed in any direction, and the spatial field intensity and the directivity are greatly improved. Therefore, the reader-writer combined antenna formed by the 5 sub-loops can eliminate a zero mutual inductance area, and realize the omnidirectional reading of the underground electronic tag.
For a reader-writer combined antenna formed by more sub-loops, even number of sub-loop antennas have spatial magnetic field distribution similar to that of 4 sub-loop antennas, odd number of sub-loop antennas have spatial magnetic field distribution similar to that of 5 sub-loop antennas, and the spatial magnetic field distribution of the latter is superior to that of the former.
For the length of the antenna of the underground reader-writer, in the practical application process, the electronic tag put into the underground can pass through the antenna coil of the reader-writer at a certain speed. Considering that a single communication may have errors, in order to improve system performance, the magnetic field of the reader antenna needs to ensure at least two read and write opportunities. The antenna length of the underground reader-writer can be determined by combining the operation speed of the underground tag and the time required by the tag to transmit data.
For the inner diameter of the antenna of the underground reader-writer, the larger the inductance of the antenna of the reader-writer is, the easier the reader-writer demodulates to obtain the label data through analyzing the load modulation and envelope detection principle of the RFID system. Therefore, in order to improve the performance of the downhole RFID system, the antenna inductance of the downhole RFID reader should be increased. However, the eddy current effect of the downhole metal pipeline can reduce the antenna inductance, so that the antenna inductance must be increased and then reduced along with the increase of the inner diameter of the antenna, and the inner diameter of the antenna at the maximum value of the antenna inductance is the optimal inner diameter.
The foregoing shows and describes the general principles and features of the present invention, together with the advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (4)
1. An omnidirectional RFID antenna device for controlling a petroleum downhole tool, characterized in that: a plurality of sub-loops are constructed by adopting a plurality of wires, a single sub-loop is rectangular, and the sub-loops are attached to the outer surface of a tubular antenna framework and are bent in a surrounding mode to form an omnidirectional RFID reader-writer combined coil antenna, so that coaxial installation with an underground metal pipeline is realized.
2. The omni-directional RFID antenna device for petroleum downhole tool control of claim 1, wherein: and the sub-loops have opposite phase currents and jointly generate magnetic fields in the X direction, the Y direction and the Z direction, so that the accurate reading of the position of the underground RFID tag in each direction is realized.
3. The omni-directional RFID antenna device for petroleum downhole tool control of claim 1, wherein: the number of the sub-loops is four or more.
4. The omni-directional RFID antenna device for petroleum downhole tool control of claim 1, wherein: the spatial magnetic field distribution of the odd-numbered sub-loop combined antenna in the plurality of sub-loops is better than that of the even-numbered sub-loop combined antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110309726.3A CN113054400A (en) | 2021-03-23 | 2021-03-23 | Omnidirectional RFID antenna device for controlling petroleum underground tool |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110309726.3A CN113054400A (en) | 2021-03-23 | 2021-03-23 | Omnidirectional RFID antenna device for controlling petroleum underground tool |
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| CN113054400A true CN113054400A (en) | 2021-06-29 |
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| CN202110309726.3A Pending CN113054400A (en) | 2021-03-23 | 2021-03-23 | Omnidirectional RFID antenna device for controlling petroleum underground tool |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1934576A (en) * | 2004-02-20 | 2007-03-21 | 3M创新有限公司 | Multi-loop antenna for radio frequency identification (RFID) communication |
| US20080150693A1 (en) * | 2006-12-20 | 2008-06-26 | You Hong Jun | Multiple loop antenna for rfid reader, rfid reader having same and rfid system having the rfid reader |
| CN101911380A (en) * | 2008-01-18 | 2010-12-08 | Nxp股份有限公司 | Conductive silicone wristband for wireless communications |
| US20140306853A1 (en) * | 2007-05-09 | 2014-10-16 | Petrowell Limited | Antenna for Use in a Downhole Tubular |
| CN204103046U (en) * | 2014-07-28 | 2015-01-14 | 中国石油化工股份有限公司 | Radio frequency identification reader antenna in a kind of pit shaft |
| EP3340483A1 (en) * | 2016-12-23 | 2018-06-27 | Weatherford U.K. Limited | Antenna for downhole communication |
| CN210744149U (en) * | 2020-01-03 | 2020-06-12 | 深圳市荣睿和芯科技有限公司 | High-frequency reader-writer antenna |
-
2021
- 2021-03-23 CN CN202110309726.3A patent/CN113054400A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1934576A (en) * | 2004-02-20 | 2007-03-21 | 3M创新有限公司 | Multi-loop antenna for radio frequency identification (RFID) communication |
| US20080150693A1 (en) * | 2006-12-20 | 2008-06-26 | You Hong Jun | Multiple loop antenna for rfid reader, rfid reader having same and rfid system having the rfid reader |
| US20140306853A1 (en) * | 2007-05-09 | 2014-10-16 | Petrowell Limited | Antenna for Use in a Downhole Tubular |
| CN101911380A (en) * | 2008-01-18 | 2010-12-08 | Nxp股份有限公司 | Conductive silicone wristband for wireless communications |
| CN204103046U (en) * | 2014-07-28 | 2015-01-14 | 中国石油化工股份有限公司 | Radio frequency identification reader antenna in a kind of pit shaft |
| EP3340483A1 (en) * | 2016-12-23 | 2018-06-27 | Weatherford U.K. Limited | Antenna for downhole communication |
| CN210744149U (en) * | 2020-01-03 | 2020-06-12 | 深圳市荣睿和芯科技有限公司 | High-frequency reader-writer antenna |
Non-Patent Citations (3)
| Title |
|---|
| LILI等: "Design of an Electrically Small and Near-3D Omnidirectional Loop Antenna for UHF Band RFID Tag", 《2013 IEEE INTERNATIONAL CONFERENCE ON MICROWAVE TECHNOLOGY & COMPUTATIONAL ELECTROMAGNETICS》 * |
| XIAOHUA JIN等: "Compact 3-D Cubic Loop Antennas with Omnidirectional Patterns", 《2014 IEEE ANTENNAS AND PROPAGATION SOCIETY INTERNATIONAL SYMPOSIUM (APSURSI)》 * |
| 刘健等: "煤矿井下物联网UHF射频识别标签天线设计", 《煤炭科学技术》 * |
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Application publication date: 20210629 |