CN202023558U - Low-frequency magnetic communication device - Google Patents
Low-frequency magnetic communication device Download PDFInfo
- Publication number
- CN202023558U CN202023558U CN2011200371978U CN201120037197U CN202023558U CN 202023558 U CN202023558 U CN 202023558U CN 2011200371978 U CN2011200371978 U CN 2011200371978U CN 201120037197 U CN201120037197 U CN 201120037197U CN 202023558 U CN202023558 U CN 202023558U
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- signal
- emission part
- metal pipe
- metal tube
- signal receiving
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Abstract
A low-frequency magnetic communication device comprises a signal sending portion, a metal pipe and a signal receiving portion, wherein the signal sending portion and the signal receiving portion which are arranged on the outer portion and the inner portion of the metal pipe respectively are separated by the metal pipe, the metal pipe adopts materials with the relative magnetic permeability lower than 1.005, and the signal sending portion and the signal receiving portion use an electromagnetic wave with frequency lower than 5 kilohertz to communicate. The signal sending portion uses a coil to convert electric power into a magnetic field, and the signal receiving portion uses a magnetic sensor to perform conversion from the magnetic field to electric signals, and the communication is realized after the processing of a series of signals. The low-frequency magnetic communication device can guarantee that the low-frequency electromagnetic wave penetrates through the metal pipe to normally receive signals, avoids the lag of data, is sensitive in signal receiving and simple in structure, and saves electric energy.
Description
Technical field
The utility model relates to oil, directed tunnel and geological prospecting drilling engineering deviational survey field, relates in particular to measurement-while-drilling system and geosteering system, specifically is a kind of low frequency magnetic flux T unit.
Background technology
Current in drilling engineerings such as geological prospecting, mine or oil, to in time understand drilling process information, drilling track, and the exact grasp formation information need be installed in the position very near apart from drill bit to orientation sensor and geological information sensor, when in the drilling assembly helicoid hydraulic motor being arranged in real time, can't pass lead in the screw rod, if want transfer of data to ground, needs at first stride across screw rod with data, and then are transferred to ground.The radio magnetic wave short pass effective ways that stride across screw rod are to adopt vertical electric field method designing antenna, whole drilling rod and outside drilling fluid and stratum are transmitted signal as channel, if want to receive the electric field change signal on the drilling rod, can only encase reception antenna with whole metal drill pipe, and consider that problems such as drilling rod pressure-bearing can not directly be connected to reception antenna the mud pulse generator system, so the mud pulse generator system in drilling rod can't directly receive the signal that the transmission of nearly drill bit comes, so solve the problem pendulum that how the metal tube external signal is transferred in the metal tube in face of people.
Summary of the invention
In order to overcome deficiency of the prior art, make that the signal outside the metal tube can penetrate tube wall in drilling well or geosteering system to send in the pipe that the utility model provides a kind of low frequency magnetic flux T unit.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of low frequency magnetic flux T unit is grouped into by signal emission part, metal tube and signal receiving part, signal emission part, signal receive section place metal tube outside and inner respectively, and it is characterized in that: signal emission part and signal receive section are isolated by metal tube.The electromagnetic wave that signal emission part, signal receive section frequency of utilization are lower than 5kHz communicates.
Near the parameters such as hole deviation, temperature and drill speed that signal emission part will be gathered nearly drill bit are carried out data processing back storage and emission, frequency of utilization is lower than the electromagnetic wave of 5kHz, traffic rate 110bps, send the data to signal receive section, signal carries out bandpass filtering earlier, signal amplifies then, is rs 232 serial interface signal through comparing and keeping signal decoding again.When the nearly drill bit drilling parameter of needs, signal receive section is rendered in the metal tube, near receiving data near the underground signal radiating portion, receive back storage data, mention ground again and carry out data read, so just realized use low frequency magnetic flux letter.
The beneficial effects of the utility model are that this device can guarantee to realize the normal received signal of low-frequency electromagnetic wave penetrating metal pipe, avoids the hysteresis quality of data, and the received signal sensitivity, and is simple in structure, saves electric energy.
Description of drawings
Accompanying drawing 1 is the utility model structural representation;
Accompanying drawing 2 is the utility model signal emission part workflow diagrams;
Accompanying drawing 3 is the utility model signal receive section workflow diagrams.
1. signal emission part among the figure, 2. metal tube, 3. signal receive section.
The specific embodiment
As shown in Figure 1, a kind of low frequency magnetic flux T unit is made up of signal emission part 1, metal tube 2 and signal receive section 3, signal emission part 1, signal receive section 3 place metal tube 2 outside and inner respectively, and signal emission part 1 and signal receive section 3 are isolated by metal tube 2.
As shown in Figure 2, be signal emission part 1 workflow diagram, divide four processes: data acquisition, data are handled, data are launched and resting state.Enter the laggard line data collection of duty; Laggard line data calculating and data storage are finished in collection, carry out the data emission then; After battery has fired, enter battery saving mode, i.e. resting state.System works is carried out according to above 4 step cycle.
As shown in Figure 3, be signal receive section 3 workflow diagrams, divide three processes: holding state, data receive, resting state.Start working when signal receive section 3, in the launch process of down-hole, be in holding state; Carrying out normal data then receives; After receiving data, in the time of need not receiving data, single-chip microcomputer enters battery saving mode, is in resting state.
More than enforcement of the present utility model is described in detail, and set forth its superiority.For one of ordinary skill in the art, according to the thought of the inventive method, the part that all can change in specific embodiments and applications, in sum, this description should not be construed as the restriction that invention is used to this method.
Claims (4)
1. low frequency magnetic flux T unit, be grouped into by signal emission part, metal tube and signal receiving part, signal emission part, signal receive section place metal tube outside and inner respectively, and it is characterized in that: signal emission part and signal receive section are isolated by metal tube.
2. device according to claim 1 is characterized in that: metal tube adopts relative permeability to be lower than 1.005 material.
3. device according to claim 1 is characterized in that: the electromagnetic wave that signal emission part, signal receive section frequency of utilization are lower than 5kHz communicates.
4. device according to claim 1 is characterized in that: signal emission part uses coil to convert electrical energy into magnetic field, and signal receive section uses Magnetic Sensor to carry out the conversion of magnetic field to the signal of telecommunication.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200371978U CN202023558U (en) | 2011-02-12 | 2011-02-12 | Low-frequency magnetic communication device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200371978U CN202023558U (en) | 2011-02-12 | 2011-02-12 | Low-frequency magnetic communication device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202023558U true CN202023558U (en) | 2011-11-02 |
Family
ID=44848510
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011200371978U Expired - Lifetime CN202023558U (en) | 2011-02-12 | 2011-02-12 | Low-frequency magnetic communication device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202023558U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104213910A (en) * | 2013-06-05 | 2014-12-17 | 中国石油天然气集团公司 | Constant current transmitting system for measurement while drilling of electromagnetic wave geosteering tool |
| CN114033361A (en) * | 2021-10-22 | 2022-02-11 | 中国石油大学(华东) | Near-bit multi-parameter underground measurement and control system while drilling |
-
2011
- 2011-02-12 CN CN2011200371978U patent/CN202023558U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104213910A (en) * | 2013-06-05 | 2014-12-17 | 中国石油天然气集团公司 | Constant current transmitting system for measurement while drilling of electromagnetic wave geosteering tool |
| CN114033361A (en) * | 2021-10-22 | 2022-02-11 | 中国石油大学(华东) | Near-bit multi-parameter underground measurement and control system while drilling |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: BEIJING LIUHE GREATNESS TECHNOLOGY CO., LTD. Free format text: FORMER NAME: BEIJIN LIUHE GREATNESS TECHNOLOGY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 100070 Beijing, Fengtai District, South Fourth Ring Road West, No. 12, building 188, floor 39 Patentee after: Beijing Liuhe Greatness Technology Co., Ltd. Address before: 100070 Beijing, Fengtai District, South Fourth Ring Road West, No. 12, building 188, floor 39 Patentee before: Beijing Liuhe Greatness Technology Co.,Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20111102 |
|
| CX01 | Expiry of patent term |