CN104320235B - A kind of wideband data transmission system and method for drilling fluid channel - Google Patents
A kind of wideband data transmission system and method for drilling fluid channel Download PDFInfo
- Publication number
- CN104320235B CN104320235B CN201410658895.8A CN201410658895A CN104320235B CN 104320235 B CN104320235 B CN 104320235B CN 201410658895 A CN201410658895 A CN 201410658895A CN 104320235 B CN104320235 B CN 104320235B
- Authority
- CN
- China
- Prior art keywords
- information transfer
- channel
- drilling fluid
- transfer channel
- subdata
- 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
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
Landscapes
- Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Error Detection And Correction (AREA)
- Dc Digital Transmission (AREA)
Abstract
The invention discloses a kind of wideband data transmission system and method for drilling fluid channel, method includes：Carry out analyzing the frequency domain characteristic curve for obtaining pulse signal decay using drilling fluid channel pulse signal attenuation model；The transmission function of the drilling fluid channel is obtained using the pulse signal transmission frequency-domain model analysis of the drilling fluid channel, the amplitude-frequency response of the drilling fluid channel is obtained further according to the transmission function；N number of different resonant frequency points of drilling fluid channel constitute N number of information transfer channel with different resonant frequencies respectively as an information transfer channel according to the amplitude-frequency response from the frequency domain characteristic Curve selection；The log data of underground is resolved into M subdata and transmits the M subdata to well head by N number of information transfer channel.Channel transmission information of the present invention, realizes broadband transmission, and transmission rate is greatly improved.
Description
Technical field
The present invention relates to Measurement While Drilling Data transmission field, more particularly to a kind of wideband data for drilling fluid channel is passed
Defeated system and method.
Background technology
Measurement while drilling（MWD：Measurement While Drilling）Be one kind can be measured in drill bit drilling process,
Drill bit log data nearby is gathered, and gathered data is real-time transmitted to the technology of ground system.Log data generally includes ground
Layer characteristic information and various drilling engineering parameters.
As currently used for one of information transmission technology best in drilling well measurement while drilling, drilling hydraulic force signal transmission side
The basic functional principle of formula is that the information for measuring underground is converted into control information, and control information is acted on to the drilling well of underground
Hydraulic coupling signal generator, makes the drilling liquid pressure in transmission channel change, so as to produce drilling liquid pressure pulsation, pressure
Pulsation is delivered to ground with the drilling fluid in transmission channel, is handled through Ground Processing System and is converted into required underground survey
Information.Because drilling fluid channel environment is very severe, in this information transmission mode, due to the influence of in-site measurement condition, peace
The output of the pressure sensor of detection mud pressure fluctuation on standpipe, the useful signal not only transmitted comprising underground, and
And containing due to slush pump compression mud caused by significantly periodic pressure fluctuation and other various mechanisms caused by
Pressure oscillation and random noise, signal is submerged in various noises completely at well head.
Mainly transmission speed, signal attenuation, the reflection of signal comprising signal etc. of drilling fluid signal transmission characteristicses.But it is right
In drilling hydraulic force transmission system, pressure pulse signal in drill string from shaft bottom to the transmitting procedure of well head among, due to drilling well
Liquid belongs to gas, liquid, solid three-phase flow, therebetween containing solid matters such as clay, landwaste, blanc fixes, and often exists free
The gaseous substances such as the gas of state, the drilling liquid pressure signal intensity produced by impulse generator can constantly decay, decay
Degree is influenceed by signal frequency and transmission range, and data transmission efficiency is low.
In a word, drilling fluid channel is an extremely complex channel, is included at present applied to the transmission technology on the channel：
Pulse transmission and continuous wave transmission two ways, both transmission means all only transmit letter using the low-frequency range of drilling fluid channel
Breath, pulse mode typically can only achieve 3bps, and continuous wave transmission means is also only capable of reaching 12bps transmission rate, data transfer
Speed is low.
The content of the invention
It is an object of the invention to overcome in the presence of prior art above-mentioned not enough there is provided a kind of transmission rate that improves
Wideband data transmission system and method for drilling fluid channel.
In order to realize foregoing invention purpose, the technical solution adopted by the present invention is：A kind of broadband for drilling fluid channel
Data transmission method, comprises the following steps:
Carry out analyzing the frequency domain characteristic curve for obtaining pulse signal decay using drilling fluid channel pulse signal attenuation model；
The transmission of the drilling fluid channel is obtained using the pulse signal transmission frequency-domain model analysis of the drilling fluid channel
Function, the amplitude-frequency response of the drilling fluid channel is obtained according to the transmission function；
N number of different resonant frequencies of drilling fluid channel according to the amplitude-frequency response from frequency domain characteristic Curve selection
O'clock respectively as an information transfer channel, N number of information transfer channel with different resonant frequencies is constituted；
The log data of underground is resolved into M subdata and leads to the M subdata by N number of information transfer
Transmit to well head in road；Wherein, an information transfer channel in N number of information transfer channel only transmits the M subdata
In a subdata, M≤N, and M and N are the integer more than or equal to 1.
It is preferred that, the M=N.
It is preferred that, each information transfer channel receives one in the M subdata in N number of information transfer channel
The subdata is encoded after individual subdata, then is modulated and the subdata is modulated to corresponding information transfer led to
In the resonant frequency in road.
It is preferred that, each information transfer channel carries out coding use to the subdata in N number of information transfer channel
Coded system be Bose-Chaudhuri-Hocquenghem Code, RS codings, LDPC codings, any one in convolutional encoding and Turbo coded systems.
Further, the coded system that each information transfer channel is used in N number of information transfer channel it is identical or
It is different.
It is preferred that, each information transfer channel is modulated use to the subdata in N number of information transfer channel
Modulation system for BPSK modulation, 2FSK modulation, QPSK modulation, MPSK modulation, MFSK modulation, M-QAM modulation and CPM adjust
Any one in system.
Further, the modulation system that each information transfer channel is used in N number of information transfer channel it is identical or
It is different.
The embodiment of the present invention also provides a kind of wideband data transmission system for drilling fluid channel, including:
Data demultiplexer, for the log data of underground to be resolved into Q sub- data outputs；And
The N number of information transfer channel with different resonant frequencies obtained in upper embodiment of the method, for sub by described Q
Data transfer is to well head；Wherein, an information transfer channel in N number of information transfer channel only transmits the Q subnumber
A subdata in, Q≤N, and Q and N are the integer more than or equal to 1.
It is preferred that, each information transfer channel is additionally operable to receive the Q subdata in N number of information transfer channel
In a subdata after the subdata is encoded, then be modulated the subdata be modulated to corresponding information
In the resonant frequency of transmission channel.
It is preferred that, each information transfer channel carries out coding use to the subdata in N number of information transfer channel
Coded system be Bose-Chaudhuri-Hocquenghem Code, RS codings, LDPC codings, any one in convolutional encoding and Turbo coded systems；The N
In individual information transfer channel each information transfer channel the subdata is modulated the modulation system used for BPSK modulation,
2FSK modulation, QPSK modulation, MPSK modulation, MFSK modulation, M-QAM modulation and CPM modulation in any one.
Compared with prior art, beneficial effects of the present invention：The present invention has infinite multi resonant using drilling fluid channel model
The amplitude-frequency response characteristic of vibration frequency point, selects N number of different resonant frequency points of drilling fluid channel respectively as an information transfer
Passage, constitutes N number of information transfer channel with different resonant frequencies, and each resonant frequency point is more as a sub-channels
Channel transfer information, realizes broadband transmission, and transmission rate is greatly improved.
Brief description of the drawings：
Fig. 1 is pulse signal decay intensity frequency-domain analysis curve synoptic diagram；
Fig. 2 is drilling fluid channel amplitude-frequency response schematic diagram；
Fig. 3 is the wideband data transmission system schematic diagram of drilling fluid channel of the present invention；
Fig. 4 is the broadband data transmission system using Bose-Chaudhuri-Hocquenghem Code and the BPSK drilling fluid channel modulated in the embodiment of the present invention
System schematic diagram；
Fig. 5 is the BPSK modulation principle schematic diagrames in Fig. 4；
Fig. 6 is that the wideband data transmission system for the drilling fluid channel modulated using hybrid coding in the embodiment of the present invention is shown
It is intended to.
Embodiment
With reference to embodiment, the present invention is described in further detail.But this should not be interpreted as to the present invention
The scope of above-mentioned theme is only limitted to following embodiment, all models that the present invention is belonged to based on the technology that present invention is realized
Enclose.
A kind of broadband data transmission method for drilling fluid channel of the invention, comprises the following steps:
S1, using drilling fluid channel pulse signal attenuation model analyze obtain pulse signal decay frequency domain characteristic it is bent
Line.
Pulse signal attenuation model is established as prior art, for example can be by carrying out fluid force credit to drilling fluid channel
Analysis is obtained, and is no longer described in detail herein.The present invention analyzes what obtained pulse signal was decayed using existing pulse signal attenuation model
Frequency domain characteristic curve is as shown in Figure 1.As shown in Figure 1, for each drilling fluid channel, transmission signal attenuation intensity is with channel itself
The increase first increases and then decreases of pulse signal frequency, crest frequency is appeared near frequency 0.1Hz.It is strong in low-band signal decay
Degree increases rapidly with the increase of signal frequency, and the change of signal attenuation intensity is then than shallower in high band.Thus may be used
See, pulse signal is smaller in low-frequency range decay intensity, and transmission range is farther；And in high band, then transmission stability is more preferable.Work as letter
Number frequency reaches after 0.6Hz signal attenuations intensity, and no longer great changes will take place, it is believed that the frequency domain, which is that pulse signal is stable, to be transmitted
Domain.Multiple passages that the present invention mainly uses low frequency region and each resonant frequency point to be constituted carry out data transmission.
S2, using the pulse signal transmission frequency-domain model analysis of the drilling fluid channel obtain the biography of the drilling fluid channel
Delivery function, the amplitude-frequency response of the drilling fluid channel is obtained according to the transmission function.
The foundation of the pulse signal transmission frequency-domain model of the drilling fluid channel is similarly prior art, and this is characterized in bore
The intrinsic physical features of well liquid channel, can be obtained by a variety of methods, and such as setting up model analysis by fluid mechanics principle obtains
Arrive, or obtained by experiment, is no longer described in detail herein.
Drilling fluid channel is the fluid flowing passage in drilling pipe, theoretical according to electric transmission line, with constant caliber and axial direction
The fluid transmission pipe of Laminar Flow, can be described with electric transmission line theory,Per unit length fluid is represented respectively
Flow resistance, influenza, fluid capacitance and the conductance of medium.It is possible thereby to set up the transmission line differential equation：
In formula：
--- Cascade System impedance；
--- system shunt admittance；
--- the distance of range pulse generator；
--- the variable of Laplace transform；
--- the Laplace transform of pressure；
--- the Laplace transform of flow.
The matrix expression of pulse signal transmission frequency-domain model is arrived as available from the above equation：
WhereinRepresent hyperbolic cosine function；Represent hyperbolic sine function；Represent range pulse generatorPlace
Pressure Laplace transform；Represent range pulse generatorThe Laplace transform of the flow at place；Table
Show the Laplace transform of the pressure at impulse generator；Represent the Laplace transform of the flow at impulse generator；For the characteristic impedance of system；For propagation constant,
For system transmission operator, whereinIt is the distance of range pulse generator.
The transmission function of drilling fluid channel can be obtained by above-mentioned matrix expression：
According to the transmission function, the amplitude-frequency response of drilling fluid channel can be obtained, as shown in Fig. 2 as shown in Figure 2, boring
Well liquid channel amplitude-frequency response has the following feature：Drilling fluid channel has an infinite multi-resonant Frequency point, its value and drilling fluid
Fluid properties are related.The amplitude of pressure pulse gradually increases with the increase of resonant frequency, changes more significant in low-frequency range,
But more than pressure pulse magnitude after a critical value without significant change.
S3, according to the amplitude-frequency response from frequency domain characteristic Curve selection drilling fluid channel N number of different resonance
Frequency point constitutes N number of information transfer channel with different resonant frequencies respectively as an information transfer channel.
Frequency domain characteristic curve can only reflect global attenuation characteristic of the channel with frequency, can not reflect that complete amplitude-frequency rings
Should, and pulse signal transmission frequency-domain model can only provide normalized amplitude-frequency response, it is impossible to actual attenuation is provided, therefore is needed
Both are combined to reflect complete channel amplitude-frequency response.
Drilling fluid channel drives drilling fluid to fluctuate and formed by down-hole pressure impulse generator generation pulse, in low frequency
Section（Below 0.6Hz）, gathered data is modulated on the low frequency of drilling fluid channel point and forms modulated signal, modulated signal is loaded with number
According to and send data to well head.In order to improve the speed of transmission, some characteristics that the present invention itself is had based on the channel, i.e.,
Above-mentioned frequency domain characteristic curve and normalized amplitude-frequency response characteristic, realize the broadband data transmission of high-speed multiple channel.According to Fig. 2
In obtained drilling fluid channel the characteristics of there is multiple resonant frequency points, we can be by each resonant frequency point（Such as 2Hz,
The resonant frequency points such as 4Hz, 6Hz）As an information transfer channel, so as to design a kind of broadband data transmission of multichannel with reality
The purpose of existing high speed data transfer.
S4, the log data of underground is resolved into M subdata and the M subdata is passed through into N number of information pass
Defeated channel transfer is to well head；Wherein, an information transfer channel in N number of information transfer channel only transmits the M son
A subdata in data, M≤N, and M and N are the integer more than or equal to 1, preferably M=N.
The present invention has the amplitude-frequency response characteristic of infinite multi-resonant Frequency point using drilling fluid channel model, selects drilling fluid
N number of different resonant frequency points of channel constitute N number of information with different resonant frequencies respectively as an information transfer channel
Transmission channel, each resonant frequency point realizes broadband transmission, transmission rate as a sub-channels, channel transmission information
Greatly improve.
In one embodiment, each information transfer channel receives the M subnumber in N number of information transfer channel
The subdata is encoded after a subdata in, then is modulated the subdata is modulated to corresponding letter
In the resonant frequency for ceasing transmission channel.
Specifically, the subnumber of the log data after the resonant frequency of each information transfer channel is different, and only transmission is decomposed
One in, i.e. one information transfer channel of each subdata correspondence, will according to the transmission rate of each information transfer channel
Log data（Such as bit stream）It is decomposed into N number of subdata（Sub- bit stream）, every sub- bit stream is admitted to its corresponding information and passes
The coding demodulator of defeated passage.Each information transfer channel is equipped with coding demodulator, and coding demodulator is by the sub- bit received
Stream is encoded, modulated, and sub- bit stream is modulated to the resonant frequency of its corresponding information transfer channel（That is drilling fluid channel
One resonant frequency point）Upper formation modulated signal, then exported modulated signal to well head by drilling fluid channel.
Each information transfer channel to the subdata encode the coding staff of use in N number of information transfer channel
Formula is any one in Bose-Chaudhuri-Hocquenghem Code, RS codings, LDPC codings, convolutional encoding and Turbo coded systems.N number of information is passed
The coded system that each information transfer channel is used in defeated passage is identical or difference.
Accordingly, each information transfer channel is modulated use to the subdata in N number of information transfer channel
Modulation system for BPSK modulation, 2FSK modulation, QPSK modulation, MPSK modulation, MFSK modulation, M-QAM modulation and CPM adjust
Any one in system.The modulation system that each information transfer channel is used in N number of information transfer channel is identical or not
Together.Both coding and modulation combine to reach the purpose for the frequency band for efficiently utilizing each information transfer channel.The volume of each passage
Code and modulation system can be with identical, can also be different, to compromise between system complexity and band efficiency.
The embodiment of the present invention also provides a kind of wideband data transmission system for drilling fluid channel, including:Data are demultiplexed
With device, for the log data of underground to be resolved into Q sub- data outputs；And the N number of tool obtained in above method embodiment
There is the information transfer channel of different resonant frequencies（With specific reference to embodiment of the method part associated description）, for sub by described Q
Data transfer is to well head；Wherein, an information transfer channel in N number of information transfer channel only transmits the Q subnumber
A subdata in, that is to say, that each information transfer channel only transmits one in the subdata of the log data after decomposing
It is individual, one information transfer channel of each subdata correspondence, Q≤N, and Q and N are the integer more than or equal to 1, preferably Q=N.
In one example, each information transfer channel is additionally operable to receive the Q in N number of information transfer channel
The subdata is encoded after a subdata in subdata, then be modulated by the subdata be modulated to correspondence
Information transfer channel resonant frequency on.
Specifically, data demultiplexer according to the transmission rate of each information transfer channel by log data（Such as bit stream）
It is decomposed into N number of subdata（Sub- bit stream）, every sub- bit stream is admitted to the coding demodulator of its corresponding information transfer channel.
Each information transfer channel is equipped with coding demodulator, and the sub- bit stream received is encoded, modulated by coding demodulator, by son
Bit stream is modulated to the resonant frequency of its corresponding information transfer channel（That is a resonant frequency point of drilling fluid channel）Upper shape
Modulated signal is exported to well head into modulated signal, then by drilling fluid channel.
Each information transfer channel to the subdata encode the coding staff of use in N number of information transfer channel
Formula is any one in Bose-Chaudhuri-Hocquenghem Code, RS codings, LDPC codings, convolutional encoding and Turbo coded systems；N number of information is passed
Each information transfer channel is modulated the modulation system used to the subdata and adjusted for BPSK modulation, 2FSK in defeated passage
System, QPSK modulation, MPSK modulation, MFSK modulation, M-QAM modulation and CPM modulation in any one.Both coding and modulation
With reference to reach efficiently utilize each information transfer channel frequency band purpose.The coding and modulation system of each passage can phases
Together, can also be different, to compromise between system complexity and band efficiency.With reference to illustrating the system.
Embodiment 1：Information transfer channel described in the wideband data transmission system for drilling fluid channel of the present embodiment
Modulation system use BPSK modulation systems, information transfer channel coding use Bose-Chaudhuri-Hocquenghem Code mode, as shown in figure 4, data are demultiplexed
With device by the log data of underground（Such as bit stream）Resolve into Q subdata（Sub- bit stream）Output, it is N number of that there is different resonance frequency
The information transfer channel of rate is one-to-one respectively by the Q sub- data transfers to well head；Wherein, N number of information transfer
An information transfer channel in passage only transmits a subdata in the Q subdata, that is to say, that each information is passed
Defeated passage only transmits one in the subdata of the log data after decomposing, and each subdata corresponds to an information transfer channel,
Wherein Q and N are the integer more than or equal to 1, Q=N.
Wherein Bose-Chaudhuri-Hocquenghem Code is a kind of forward error correction, can improve the error performance of transmission.BPSK modulation principle is as schemed
Shown in 5, the binary bits data of input carry out level conversion first, are converted to positive and negative two level signal, and such as binary one is changed
For+V, Binary Zero is converted to-V, and the signal after conversion realizes that BPSK is modulated with carrier multiplication.Wherein carrier frequencyWith passage n
Resonant frequency it is consistent.Each information transfer channel is equipped with coding demodulator, and coding demodulator flows into the sub- bit received
Row coding, modulation, sub- bit stream are modulated to the resonant frequency of its corresponding information transfer channel（That is one of drilling fluid channel
Resonant frequency point）Upper formation modulated signal, then exported modulated signal to well head by drilling fluid channel.
Embodiment 2：Each information transfer channel in the wideband data transmission system for drilling fluid channel of the present embodiment
It is hybrid coding modulation system using different coding and modulation system（The explanation by taking 4 passages as an example）.
Fig. 6 shows the wideband data transmission system for drilling fluid channel of a 4 passage hybrid codings modulation, 1
Passage is modulated using Bose-Chaudhuri-Hocquenghem Code+BPSK, and 2 passages are modulated using convolutional encoding+QPSK, and 3 passages are modulated using RS codings+2FSK,
4 passages are modulated using Bose-Chaudhuri-Hocquenghem Code+CPM.In this case, can be when data be demultiplexed according to different types of measurement
Data distribution to different information transfer channels is transmitted by data to the differences of the requirements such as delay, the bit error rate, it is ensured that number
According to transmitting.
The present invention has the amplitude-frequency response characteristic of infinite multi-resonant Frequency point using drilling fluid channel model, selects drilling fluid
N number of different resonant frequency points of channel constitute N number of information with different resonant frequencies respectively as an information transfer channel
Transmission channel, each resonant frequency point realizes broadband transmission, transmission rate as a sub-channels, channel transmission information
Greatly improve.
The embodiment of the present invention is described in detail above in conjunction with accompanying drawing, but the present invention is not restricted to
Embodiment is stated, in the case of the spirit and scope of claims hereof are not departed from, those skilled in the art can make
Go out various modifications or remodeling.
Claims (10)
1. a kind of broadband data transmission method for drilling fluid channel, it is characterised in that comprise the following steps:
Carry out analyzing the frequency domain characteristic curve for obtaining pulse signal decay using drilling fluid channel pulse signal attenuation model；
The transmission function of the drilling fluid channel is obtained using the pulse signal transmission frequency-domain model analysis of the drilling fluid channel,
The amplitude-frequency response of the drilling fluid channel is obtained further according to the transmission function；
The complete channel amplitude-frequency response choosing reflected according to the combination of the amplitude-frequency response and the frequency domain characteristic curve
N number of different resonant frequency points of the drilling fluid channel are selected respectively as an information transfer channel, are constituted N number of with different humorous
The information transfer channel of vibration frequency；
The log data of underground is resolved into M subdata and passes the M subdata by N number of information transfer channel
Transport to well head；Wherein, an information transfer channel in N number of information transfer channel is only transmitted in the M subdata
One subdata, M≤N, and M and N are the integer more than or equal to 1.
2. the broadband data transmission method according to claim 1 for drilling fluid channel, it is characterised in that the M=
N。
3. the broadband data transmission method according to claim 2 for drilling fluid channel, it is characterised in that described N number of
Each information transfer channel is received after a subdata in the M subdata to the subnumber in information transfer channel
According to being encoded, then it is modulated the subdata is modulated in the resonant frequency of corresponding information transfer channel.
4. the broadband data transmission method according to claim 3 for drilling fluid channel, it is characterised in that described N number of
Each information transfer channel to the subdata encode the coded system used for Bose-Chaudhuri-Hocquenghem Code, RS in information transfer channel
Any one in coding, LDPC codings, convolutional encoding and Turbo coded systems.
5. the broadband data transmission method according to claim 4 for drilling fluid channel, it is characterised in that described N number of
The coded system that each information transfer channel is used in information transfer channel is identical or difference.
6. the broadband data transmission method for drilling fluid channel according to claim any one of 3-5, it is characterised in that
Each information transfer channel is modulated the modulation system used to the subdata for BPSK in N number of information transfer channel
Modulation, 2FSK modulation, QPSK modulation, MPSK modulation, MFSK modulation, M-QAM modulation and CPM modulation in any one.
7. the broadband data transmission method according to claim 6 for drilling fluid channel, it is characterised in that described N number of
The modulation system that each information transfer channel is used in information transfer channel is identical or difference.
8. a kind of wideband data transmission system for drilling fluid channel, it is characterised in that including:
Data demultiplexer, for the log data of underground to be resolved into Q sub- data outputs；
The N number of information transfer channel with different resonant frequencies obtained in method described in claim 1, for by the Q
Individual sub- data transfer is to well head；Wherein, an information transfer channel in N number of information transfer channel only transmits the Q
A subdata in subdata, Q≤N, and Q and N are the integer more than or equal to 1.
9. the wideband data transmission system according to claim 8 for drilling fluid channel, it is characterised in that described N number of
Each information transfer channel is additionally operable to receive after a subdata in the Q subdata to institute in information transfer channel
State subdata to be encoded, then be modulated the subdata is modulated in the resonant frequency of corresponding information transfer channel.
10. the wideband data transmission system according to claim 9 for drilling fluid channel, it is characterised in that described N number of
Each information transfer channel to the subdata encode the coded system used for Bose-Chaudhuri-Hocquenghem Code, RS in information transfer channel
Any one in coding, LDPC codings, convolutional encoding and Turbo coded systems；Each believe in N number of information transfer channel
Breath transmission channel is modulated the modulation system used to the subdata for BPSK modulation, 2FSK modulation, QPSK modulation, MPSK
Modulation, MFSK modulation, M-QAM modulation and CPM modulation in any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410658895.8A CN104320235B (en) | 2014-11-18 | 2014-11-18 | A kind of wideband data transmission system and method for drilling fluid channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410658895.8A CN104320235B (en) | 2014-11-18 | 2014-11-18 | A kind of wideband data transmission system and method for drilling fluid channel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104320235A CN104320235A (en) | 2015-01-28 |
| CN104320235B true CN104320235B (en) | 2017-07-28 |
Family
ID=52375411
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410658895.8A Expired - Fee Related CN104320235B (en) | 2014-11-18 | 2014-11-18 | A kind of wideband data transmission system and method for drilling fluid channel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104320235B (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105041304B (en) * | 2015-07-27 | 2017-09-26 | 电子科技大学 | Pump impulse interfering signal removing method based on two-dimensional dct |
| CN106850479B (en) * | 2017-02-15 | 2020-02-14 | 中国石油大学(华东) | Drilling fluid continuous wave frequency continuous phase smooth coding modulation and demodulation system and method |
| CN108366027B (en) * | 2018-05-10 | 2021-08-17 | 中国石油集团渤海钻探工程有限公司 | Dual-period QPSK continuous phase-shift keying modulation and demodulation system |
| CN109617651A (en) * | 2018-11-30 | 2019-04-12 | 中国地质大学（武汉） | Underground coal mine electromagnetic measurement while drilling Bose-Chaudhuri-Hocquenghem Code technology based on BPSK |
| CN110995287B (en) * | 2019-11-26 | 2022-06-21 | 成都深地领航能源科技有限公司 | Method for checking and correcting mud pulse signal |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102457462A (en) * | 2010-11-01 | 2012-05-16 | 西安石油大学 | Method for transmitting signal in bored well by utilizing OFDM (Orthogonal Frequency Division Multiplexing) technology |
-
2014
- 2014-11-18 CN CN201410658895.8A patent/CN104320235B/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102457462A (en) * | 2010-11-01 | 2012-05-16 | 西安石油大学 | Method for transmitting signal in bored well by utilizing OFDM (Orthogonal Frequency Division Multiplexing) technology |
Non-Patent Citations (3)
| Title |
|---|
| 充气钻井随钻测量脉冲信号衰减规律;李洪涛等;《石油勘探与开发》;20120430;正文第3.3节 * |
| 钻井信息传输通道特性仿真;张会先;《中国优秀硕士论文电子期刊网》;20140715;全文 * |
| 钻井液连续波发生器设计与信号传输特性实验研究;贾朋;《中国博士学位论文电子期刊网》;20110815;全文 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104320235A (en) | 2015-01-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104320235B (en) | A kind of wideband data transmission system and method for drilling fluid channel | |
| RU2310215C2 (en) | Well telemetry system (variants) and method for geophysical research in process of drilling (variants) | |
| US9778389B2 (en) | Communication applications | |
| CN106089188B (en) | A kind of real-time minimizing technology of mud pulse signal pump noise | |
| US9625603B2 (en) | Downhole communication applications | |
| EP2165219B1 (en) | Improved pulse signaling for downhole telemetry | |
| CN1781272A (en) | Downhole telemetry system using discrete multi-tone modulation in a wireless communication medium | |
| CN105432037B (en) | A kind of method, equipment, system and computer-readable medium for data transmission | |
| GB2452367A (en) | Obtaining an upwardly propagating data signal in wellbore communication system | |
| CA2997349C (en) | Mud pulse telemetry preamble for sequence detection and channel estimation | |
| NO20190601A1 (en) | Method and System for Communication by Controlling the Flowrate of a Fluid | |
| CN111786927B (en) | Orthogonal frequency division multiplexing while-drilling data transmission method, system, storage medium and application | |
| US20130234859A1 (en) | Method for Transmission of Data from a Downhole Sensor Array | |
| WO2016160769A1 (en) | Compressed telemetry for time series downhole data using variable scaling and grouped words | |
| CN103603657A (en) | Method for measuring formation resistivity at drill place | |
| US6788219B2 (en) | Structure and method for pulse telemetry | |
| CN107327292A (en) | A kind of coding method of well logging signal | |
| CN105756676A (en) | Method for measuring gas holdup of oil-gas-water three-phase flow by transmission-type ultrasonic sensor | |
| CN110397433B (en) | Rock debris bed recognition system | |
| CN101881157B (en) | Sound wave well logging transducer | |
| CN102425410A (en) | Measurement while drilling (MWD) ultrasonic data transmitting method and device | |
| CN111262635B (en) | Sound wave communication method for oil-water well | |
| CN107201897A (en) | Double-channel measurement-while-drilling system and its downhole modes control method | |
| US10487823B2 (en) | Fluid flow normalizer | |
| CN202832515U (en) | High-pressure-resisting continuous pipe drilling machine under-pit communication device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170728 Termination date: 20181118 |