CN106761712A - Downhole wireless electromagnetism short pass method and system based on MSK modulation - Google Patents
Downhole wireless electromagnetism short pass method and system based on MSK modulation Download PDFInfo
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- CN106761712A CN106761712A CN201611230719.XA CN201611230719A CN106761712A CN 106761712 A CN106761712 A CN 106761712A CN 201611230719 A CN201611230719 A CN 201611230719A CN 106761712 A CN106761712 A CN 106761712A
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- Prior art keywords
- signal
- msk
- pipe nipple
- electromagnetic
- nearly
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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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Classifications
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B47/00—Survey of boreholes or wells
- E21B47/12—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling
- E21B47/13—Means for transmitting measuring-signals or control signals from the well to the surface, or from the surface to the well, e.g. for logging while drilling by electromagnetic energy, e.g. radio frequency
Abstract
A kind of downhole wireless electromagnetism short pass method and system based on MSK modulation；The method is comprised the following steps：(1) data that sensor is gathered are modulated to msk signal；(2) msk signal carries out power amplification；(3) the signal transmitting output after amplifying；(4) electromagnetic signal is received；(5) signal amplification and filtering are carried out to the electromagnetic signal for receiving, and extracts data；(6) data that will be extracted are transmitted to MWD mud-pulse transmitting devices；The system includes that nearly bit sensors pipe nipple, signal occur transmitting pipe nipple, signal and receive pipe nipple and MWD mud-pulse transmitting devices；Nearly bit sensors are provided with nearly bit sensors pipe nipple, signal occurs to be provided with msk signal generator and electromagnetic signal emitting antenna in transmitting pipe nipple, signal receives and msk signal receiver and electromagnetic signal reception antenna is provided with pipe nipple, and MWD mud-pulses transmitting device receives pipe nipple and is connected with signal.The present invention realizes nearly drill bit data and fast and accurately transmits.
Description
Technical field
The present invention relates to downhole wireless electromagnetism short pass method of the one kind based on MSK (minimum frequency shift keying) modulation technique
And system, belong to technical field of underground measurement, it is specifically for use in measurement-while-drilling system (MWD, Measure While
Drilling)。
Background technology
With the development of measurement while drilling and geosteering logging technique, increasing data sampling sensor is installed in
Drill bit nearby with it is more accurate, more timely obtain formation information.
But in rotary steering logging system, drill bit with mwd system (measurement-while-drilling system) is separated by power drilling tool
, the two cannot be connected by cable.Therefore the data transfer that how nearly bit sensors are gathered is to mwd system just into urgently
The problem that need to be solved.Prior art carries out data transfer after modulating data onto using spiral winding as transmitting, reception antenna, deposits
The problem complicated in R-T unit, transmission signal easily receives the interference of underground complex environment.
The content of the invention
For the deficiency that e measurement technology under existing well is present, a kind of present invention transmitting procedure of offer is simple, signal is difficult to receive
The downhole wireless electromagnetism short pass method based on MSK modulation of interference, the data that the method nearly bit sensors are collected are passed through
Launched by antenna with MSK modulation formats and exported.There is provided a kind of system for realizing the method simultaneously.
Downhole wireless electromagnetism short pass method based on MSK modulation of the invention, comprises the following steps：
(1) data that drill bit runs are gathered by nearly bit sensors, and is modulated to msk signal；
(2) msk signal carries out power amplification；
(3) signal after amplifying launches output through electromagnetic signal emitting antenna；
(4) electromagnetic signal exported by transmitting antenna is received by reception antenna；
(5) signal amplification and filtering are carried out to the electromagnetic signal for receiving, and extracts data；
(6) data that will be extracted are transmitted to MWD mud-pulse transmitting devices.
The downhole wireless electromagnetism short pass system based on MSK modulation of the above method is realized, using following technical scheme：
Pipe nipple and MWD mud arteries and veins received and transmitting pipe nipple, signal in the system, including nearly bit sensors pipe nipple, signal there is
Rush transmitting device；Nearly bit sensors are provided with nearly bit sensors pipe nipple, signal occurs to be provided with MSK letters in transmitting pipe nipple
Number generator and electromagnetic signal emitting antenna, nearly bit sensors are connected with msk signal generator, msk signal generator and electricity
Magnetic signal transmitting antenna is connected；Signal is received in pipe nipple and is provided with msk signal receiver and electromagnetic signal reception antenna, electromagnetic wave
Reception antenna is connected with msk signal receiver；MWD mud-pulses transmitting device receives the pulse signal demodulation in pipe nipple with signal
Circuit is connected.
The nearly bit sensors are at least resistivity sensor, natural gamma sensor, deviation sensor, vibrating sensing
One kind in device and temperature sensor.
The msk signal generator includes pulse signal modulation circuit and power amplification circuit, power amplification circuit and arteries and veins
Signal modulation circuit connection is rushed, electromagnetic signal emitting antenna is connected with power amplification circuit.
The msk signal receiver includes signal amplification circuit, filter circuit and pulse signal demodulator circuit, and electromagnetic wave connects
Antenna, signal amplification circuit, filter circuit and pulse signal demodulator circuit is received to be sequentially connected.
Nearly bit sensors pipe nipple directly be connected with drill bit, signal occur transmitting pipe nipple be connected to bit sensors pipe nipple and
Between drilling tool, signal receives pipe nipple and is connected on drilling tool.Sensor in nearly drill bit measurement pipe nipple gathers various real time information numbers
According to, transmitted after encoded modulation to MWD mud-pulse transmitting devices, finally it is uploaded to ground information processing system.
The present invention data that nearly bit sensors are collected are passed through with MSK modulation formats by antenna transmitting output, solution
Past wireless short pass system R-T unit of having determined is complicated, transmission signal easily by the problem of underground complex environment interference, is realized
Nearly drill bit data is fast and accurately transmitted.
Brief description of the drawings
Fig. 1 is the principle schematic diagram. of the downhole wireless electromagnetism short pass system based on MSK modulation in the present invention.
The step of Fig. 2 is the downhole wireless electromagnetism short pass method based on MSK modulation in present invention FB(flow block).
In figure：1. drill bit, 2. nearly bit sensors pipe nipple, 3. signal there is transmitting pipe nipple, 4. drilling tool, 5. signal receive short
Save, 6.MWD mud-pulse transmitting devices, 7. stratum, 8. borehole wall.
Specific embodiment
Downhole wireless electromagnetism short pass system based on MSK modulation of the invention, as shown in figure 1, including nearly bit sensors
Pipe nipple 5 and MWD mud-pulses transmitting device 6 received and transmitting pipe nipple 3, signal in pipe nipple 2, signal there is.Nearly bit sensors pipe nipple 2
Directly it is connected with drill bit 1, nearly bit sensors group is provided with nearly bit sensors pipe nipple 2, nearly bit sensors group is resistance
The required downhole sensors such as rate sensor, natural gamma sensor, deviation sensor, vibrating sensor and temperature sensor
One or more.Signal occur transmitting pipe nipple 3 be connected to bit sensors pipe nipple 2 and drilling tool 4 (screw rod, MTR etc. every
From mud-pulse transmitting device 6 and the instrument or equipment of drill bit 1) between, signal occurs to be provided with msk signal in transmitting pipe nipple 3
Generator and electromagnetic signal emitting antenna, msk signal generator include pulse signal modulation circuit and power amplification circuit, near to bore
Head sensor is connected with power amplification circuit, and power amplification circuit is connected with pulse signal modulation circuit, electromagnetic signal emitting day
Line is connected with power amplification circuit.Signal receives pipe nipple 5 and is connected on drilling tool 4, and signal is received in pipe nipple 5 and is provided with msk signal
Receiver and electromagnetic signal reception antenna.Msk signal receiver includes the demodulation of signal amplification circuit, filter circuit and pulse signal
Circuit, electromagnetic wave reception antenna, signal amplification circuit, filter circuit and pulse signal demodulator circuit are sequentially connected.MWD mud arteries and veins
Transmitting device 6 is rushed to be connected with the pulse signal demodulator circuit in signal reception pipe nipple 5.
Pulse signal modulation circuit, power amplification circuit, filter circuit, signal amplification circuit and pulse signal demodulator circuit
Use existing custom circuit.Electromagnetic signal emitting antenna and electromagnetic signal reception antenna using spiral loop antenna or with etc
As design structure.
Due to the presence of drilling tool 4, any cable cannot be normal through the formation information of nearly drill bit and the state of drill bit 1 etc.
Information cannot timely be transmitted to ground and carry out information processing, therefore the present invention is in the form of electromagnetic wave, with stratum 7, drilling well
Drilling fluid inside wall 8 and drilling tool 4 is electromagnetic transmission channel, the data transfer that nearly bit sensors are gathered to MWD mud arteries and veins
Transmitting device 6 is rushed, then information processing is carried out by the system transfers to ground, so can timely adjusted according to down-hole information and surveyed
Strategy is visited, exploration efficiency is effectively lifted.
Said system is based on method of the MSK modulation to downhole wireless electromagnetism short pass, and nearly bit sensors are collected
Data launch output by antenna in the form of msk signal after ovennodulation via electromagnetic signal channel；Msk signal receiver is received
Msk signal, and the data transfer that demodulated signal is obtained is to MWD mud-pulses transmitting device 6.Such as Fig. 2, including walk in detail below
Suddenly：
1. the data of the sensor collection in nearly bit sensors pipe nipple 2 are adjusted by the pulse signal in msk signal generator
Circuit processed is modulated to msk signal；
2.MSK signals carry out power amplification by the power amplification circuit in msk signal generator；
3. the signal after power amplification is launched by electromagnetic signal emitting antenna and exported；
4. electromagnetic signal reception antenna receives the electromagnetic signal exported by electromagnetic signal emitting antenna；
5. the electromagnetic signal that will be received by the signal amplification circuit in msk signal receiver carries out signal amplification；
6. the signal after amplification is filtered by the filter circuit in msk signal receiver, and by msk signal receiver
In pulse signal demodulator circuit extract data；
7. the data for extracting are transmitted to MWD mud-pulses transmitting device 6.
The electromagnetic signal for being loaded with data is transmitted in the form of MSK.Electromagnetic wave signal transmission channel by stratum, drill collar and
Drilling fluid is constituted.Msk signal generator produces faint induced-current to transmit electricity by way of electromagnetic induction in electromagnetic signal channel
Magnetic data.Transmitted to ground information processing system by mud-pulse transmitting device.
Claims (5)
1. it is a kind of based on MSK modulation downhole wireless electromagnetism short pass method, it is characterized in that, comprise the following steps：
(1) data that drill bit runs are gathered by nearly bit sensors, and is modulated to msk signal；
(2) msk signal carries out power amplification；
(3) signal after amplifying launches output through electromagnetic signal emitting antenna；
(4) electromagnetic signal exported by transmitting antenna is received by reception antenna；
(5) signal amplification and filtering are carried out to the electromagnetic signal for receiving, and extracts data；
(6) data that will be extracted are transmitted to MWD mud-pulse transmitting devices.
2. a kind of downhole wireless electromagnetism short pass system based on MSK modulation, including nearly bit sensors pipe nipple, signal launch
Pipe nipple, signal receive pipe nipple and MWD mud-pulse transmitting devices；It is characterized in that：Nearly brill is provided with nearly bit sensors pipe nipple
Head sensor, signal occurs to be provided with msk signal generator and electromagnetic signal emitting antenna, nearly bit sensors in transmitting pipe nipple
It is connected with msk signal generator, msk signal generator is connected with electromagnetic signal emitting antenna；Signal is received and is provided with pipe nipple
Msk signal receiver and electromagnetic signal reception antenna, electromagnetic wave reception antenna are connected with msk signal receiver；MWD mud-pulses
Transmitting device receives the pulse signal demodulator circuit in pipe nipple and is connected with signal.
3. it is according to claim 2 based on MSK modulation downhole wireless electromagnetism short pass system；It is characterized in that：The nearly brill
Head sensor is at least in resistivity sensor, natural gamma sensor, deviation sensor, vibrating sensor and temperature sensor
One kind.
4. it is according to claim 2 based on MSK modulation downhole wireless electromagnetism short pass system；It is characterized in that：The MSK letters
Number generator includes pulse signal modulation circuit and power amplification circuit, and power amplification circuit connects with pulse signal modulation circuit
Connect, electromagnetic signal emitting antenna is connected with power amplification circuit.
5. it is according to claim 2 based on MSK modulation downhole wireless electromagnetism short pass system；It is characterized in that：The MSK letters
Number receiver includes signal amplification circuit, filter circuit and pulse signal demodulator circuit, and electromagnetic wave reception antenna, signal amplify electricity
Road, filter circuit and pulse signal demodulator circuit are sequentially connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611230719.XA CN106761712A (en) | 2016-12-28 | 2016-12-28 | Downhole wireless electromagnetism short pass method and system based on MSK modulation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611230719.XA CN106761712A (en) | 2016-12-28 | 2016-12-28 | Downhole wireless electromagnetism short pass method and system based on MSK modulation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106761712A true CN106761712A (en) | 2017-05-31 |
Family
ID=58922387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611230719.XA Withdrawn CN106761712A (en) | 2016-12-28 | 2016-12-28 | Downhole wireless electromagnetism short pass method and system based on MSK modulation |
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| CN (1) | CN106761712A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108678734A (en) * | 2018-06-01 | 2018-10-19 | 北京六合伟业科技股份有限公司 | A kind of nearly drill bit measuring device that the scope of application is big |
| CN110057580A (en) * | 2019-04-17 | 2019-07-26 | 中国矿业大学 | A kind of main shaft of hoister dynamic response characteristic test device and method |
| CN113738349A (en) * | 2021-08-09 | 2021-12-03 | 中国海洋石油集团有限公司 | Wireless electromagnetic transmission device |
| CN113863921A (en) * | 2021-09-24 | 2021-12-31 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | Near-bit wireless short transmission driving circuit and power self-adjusting method thereof |
| 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 |
Citations (3)
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| CN1657741A (en) * | 2004-02-16 | 2005-08-24 | 中国石油勘探开发研究院钻井工艺研究所 | Radio electromagnetic short transmission method and system |
| DE60209212D1 (en) * | 2001-02-27 | 2006-04-20 | Baker Hugues Inc | OSCILLATING SCISSOR VALVE FOR PRESSURE PULSE ELECTROMETRY |
| CN202081888U (en) * | 2011-06-10 | 2011-12-21 | 斯伦贝谢金地伟业油田技术(山东)有限公司 | Near-bit geo-steering system |
-
2016
- 2016-12-28 CN CN201611230719.XA patent/CN106761712A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE60209212D1 (en) * | 2001-02-27 | 2006-04-20 | Baker Hugues Inc | OSCILLATING SCISSOR VALVE FOR PRESSURE PULSE ELECTROMETRY |
| CN1657741A (en) * | 2004-02-16 | 2005-08-24 | 中国石油勘探开发研究院钻井工艺研究所 | Radio electromagnetic short transmission method and system |
| CN100410488C (en) * | 2004-02-16 | 2008-08-13 | 中国石油集团钻井工程技术研究院 | Radio electromagnetic short transmission method and system |
| CN202081888U (en) * | 2011-06-10 | 2011-12-21 | 斯伦贝谢金地伟业油田技术(山东)有限公司 | Near-bit geo-steering system |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108678734A (en) * | 2018-06-01 | 2018-10-19 | 北京六合伟业科技股份有限公司 | A kind of nearly drill bit measuring device that the scope of application is big |
| CN110057580A (en) * | 2019-04-17 | 2019-07-26 | 中国矿业大学 | A kind of main shaft of hoister dynamic response characteristic test device and method |
| CN110057580B (en) * | 2019-04-17 | 2020-09-01 | 中国矿业大学 | Device and method for testing dynamic response characteristics of main shaft of elevator |
| CN113738349A (en) * | 2021-08-09 | 2021-12-03 | 中国海洋石油集团有限公司 | Wireless electromagnetic transmission device |
| CN113863921A (en) * | 2021-09-24 | 2021-12-31 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | Near-bit wireless short transmission driving circuit and power self-adjusting method thereof |
| 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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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20170531 |
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