CN104314557B - Data transmission method for underground single-core long cable communication - Google Patents
Data transmission method for underground single-core long cable communication Download PDFInfo
- Publication number
- CN104314557B CN104314557B CN201410417915.2A CN201410417915A CN104314557B CN 104314557 B CN104314557 B CN 104314557B CN 201410417915 A CN201410417915 A CN 201410417915A CN 104314557 B CN104314557 B CN 104314557B
- Authority
- CN
- China
- Prior art keywords
- frequency
- code
- group
- data transmission
- coding rule
- 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.)
- Active
Links
Classifications
-
- 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
Abstract
The invention discloses a data transmission method for underground single-core long cable communication. An adopted coding rule comprises that 8 different frequencies are divided into a group A and a group B to perform data coding; each group comprises four frequencies; one frequency in the group A and one frequency in the group B are combined to represent a special code; totally 16 codes comprising 0 to 9, decimal points, uneven number verification codes, even number verification codes, negative value symbols with the frequencies exceeding a range, starting and stopping control commands and spare codes are formed; during data transmission, firstly a special wave form is sent to be used as a signal synchronous starting mode; then codes are sent according to the coding rule; each code comprises two frequency bands corresponding to the coding rule; each frequency band comprises a plurality of wave forms with the same quantities in multiple periods. The method is high in transmission efficiency and reliability, and a modem adopted in the method is small in size, low in power consumption, stable in performance and convenient to maintain.
Description
Technical field
The present invention relates to oil and gas well testing technical field, it is used for the long cable communication of down-hole single in particular to a kind of
Data transmission method.
Background technology
At present, adopt single armored cable transmission means the ground-downhole communication in oil gas field test jobs more.Which
Cost is relatively low, but is affected by transmission medium, manufacturing process and the adverse circumstances such as down-hole high temperature, high pressure, exist transmission speed slow,
The problems such as quantity of information is few, signal attenuation, distortion are big, and the decay of cable transmission channel and phase shift with signal frequency increase and
The increase of cable length and sharply increase.
The problems such as existing downhole instrument generally existing speed relying on cable communication is slow, data transmission is unreliable, for follow-up
Data analysiss bring obstacle.In practical application, connect problem for solving equipment cable, adopt actually used cable and instrument more
The method that device carries out connecting debugging.But the method must redistribution circuit, debugging temperature hardly possible after there is cable or instrument replacing
With determination, parity problem does not lead to it is difficult to solve downhole instrument cable to connect cable rolled state and deployed condition characteristic in debugging
The problem that news reliability is difficult to ensure that, and increased workload and labor intensity.
The base band transmission of single-core cable can not meet the high speed data transfer demand of the operations such as test, well logging, needs
Using advanced modulation-demodulation technique, to improve band efficiency, realize the high speed transmitting of data.Entered using Frequency Patterns
The cable communication of row is more reliable, and has higher cable adaptability, but its transfer rate limited it is difficult to meet high speed number
According to transmission demand.And because conditions down-hole limits, have small volume, low in energy consumption, high temperature resistant (more than 150 DEG C) to modem
And shock resistance height etc. requires.The finished product communication IC that heat-resisting quantity is more than 150 DEG C be there is no on market, and according to existing signal
Communication modes adopt loose mail to make modem by oneself, and circuit is excessively complicated, and element application is more to be wanted it is impossible to meet field use
Ask.
Content of the invention
The technical problem to be solved is, provides a kind of data transfer for the long cable communication of down-hole single
Method, efficiency of transmission is high, highly reliable, and apply its modem small volume, low in energy consumption, stable performance, maintenance side
Just.
Therefore, technical scheme is as follows:
A kind of data transmission method for the long cable communication of down-hole single, the coding rule of employing is, will using 8 not
Same frequency is divided into two groups of a, b that data is encoded, every group 4, one of one of a group frequency and b group group of frequencies
Conjunction represents a particular code, formed altogether include 0～9, arithmetic point, odd number identifying code, even number identifying code, frequency over range negative
Totally 16 codes of value symbol, on off control instruction and standby code；
During transmission data, send a specific waveform first as the synchronous initial code of signal, then according to coding rule
Then send code, each code is made up of two frequency bands corresponding with described coding rule, and each frequency band all includes quantity
The waveform in identical multiple cycle.
In this technical scheme, it is capable of high speed, the high reliability communication of remote down-hole single-core cable, apply the party
Method is designed to greatly simplify circuit design, apply the modem of this technology have small volume, low in energy consumption, stable performance,
The advantage such as easy to maintenance, and avoid the technical barrier that designs is difficult to using communication special IC non-refractory circuit；Should
Method efficiently solves the downhole instrument being communicated in oil field and the unconformable problem of cable using single armored cable, improves
The speed of signal transmission and reliability, the communication that transmission speed is sufficient for the most of loggers that current industry needs needs
Ask, communication performance is stable, adaptability is stronger, before eliminating construction operation, cable and instrument carry out the step connecting debugging.
In this technical scheme, using the circuit design method of adaptive blind equalization, entered using special modem
Row downhole instrument and the communication on ground, modem is new with what dual-tone multifrequency dtmf form combined using frequency modulation(PFM)
" class dtmf " signal format, " solves the problems, such as that communication speed is relatively low, cable adaptability and reliability are poor.
In the data transmission, due to exist signal interference, so each frequency band all include multiple cycles can be effectively
Opposing interference, but each frequency band includes the too many cycle and can affect the transfer rate of data again.Total according to practical experience
Knot, the amount of cycles of the waveform that each frequency band includes adopts 5～10, both can ensure that the reliability of transmission data, and might be used again
To ensure to meet the transfer rate being actually needed.
The numerical value of described 8 frequencies, all between 10000hz and 12000hz, both can ensure that the transmission speed of data,
Disclosure satisfy that the needs of the data precision of downhole testing again.
Described specific waveforms can be the square-wave waveform of a cycle predeterminated frequency, for example with a cycle
The square wave of 1000hz is as the synchronous initial code of signal.
Brief description
Fig. 1 is coding rule in the data transmission method for the long cable communication of down-hole single according to embodiments of the present invention
Schematic diagram；
The signal that the data transmission method for the long cable communication of down-hole single that Fig. 2 is according to embodiments of the present invention produces
The schematic diagram of form.
Specific embodiment
With reference to the accompanying drawings and detailed description the present invention is described in further detail.It should be noted that not
In the case of conflict, the feature in embodiments herein and embodiment can be mutually combined.
It is used for the data transmission method of the long cable communication of down-hole single, the coding rule of employing according to an embodiment of the invention
It is then to be divided into two groups of a, b that data is encoded the frequency different using 8, every group 4, one of a group frequency and b
One of group combination of frequency represents a particular code, is formed altogether and includes 0～9, arithmetic point, odd number identifying code, even number checking
Totally 16 codes of code, the instruction of the negative value symbol of frequency over range, on off control and standby code；
During transmission data, send a specific waveform first as the synchronous initial code of signal, then according to coding rule
Then send code, each code is made up of two frequency bands corresponding with described coding rule, and each frequency band all includes quantity
The waveform in identical multiple cycle.
Wherein, corresponding its frequency of waveform of synchronous initial code should be different from 8 frequencies in coding rule, to avoid sending out
Raw conflict, this is general knowledge known in those skilled in the art, repeats no more；On off control instruction is directed to data sending terminal and sends out
Give the start and stop that this instruction is sent with control data, alternate code gives over to standby.
Coding rule specifically can as shown in fig. 1, and 8 different frequency combinations form 16 codes, using different frequency
Combination represents ten numerals of 0-9, and symbol " * " represents arithmetic point, and a represents odd number identifying code, and b represents even number identifying code, and c represents and opens
Stop control instruction, d is standby instruction, " # " represents the negative value symbol that numerical value exceeds measurement range.With full scale 0-10000psi,
0-150 DEG C of maximum temperature-measuring range, as a example the electronic pressure gauge data transfer of 2 after accuracy rating arithmetic point, its signal format is such as
Shown in Fig. 2, initially with a cycle 1000hz square wave as signal synchronous initial code, then each two frequency band
Represent a code, in each frequency band, all include the waveform in 5 cycles.
In this technical scheme, it is capable of high speed, the high reliability communication of remote down-hole single-core cable, apply the party
Method is designed to greatly simplify circuit design, apply the modem of this technology have small volume, low in energy consumption, stable performance,
The advantage such as easy to maintenance, and avoid the technical barrier that designs is difficult to using communication special IC non-refractory circuit；Should
Method efficiently solves the downhole instrument being communicated in oil field and the unconformable problem of cable using single armored cable, improves
The speed of signal transmission and reliability, the communication that transmission speed is sufficient for the most of loggers that current industry needs needs
Ask, communication performance is stable, adaptability is stronger, before eliminating construction operation, cable and instrument carry out the step connecting debugging.
In this technical scheme, using the circuit design method of adaptive blind equalization, entered using special modem
Row downhole instrument and the communication on ground, modem is new with what dual-tone multifrequency dtmf form combined using frequency modulation(PFM)
" class dtmf " signal format, " solves the problems, such as that communication speed is relatively low, cable adaptability and reliability are poor.
Ground system be applied to single-core cable oil and gas well testing, logging operation for the technique and the signal of downhole tool
Transmission, can greatly simplify existing underground equipment telecommunication circuit, reduce the volume of modem, reduce its power consumption, and solve
Existing communication IC of having determined is difficult to the problem of high temperature resistant design, substantially increases the telecommunication speed of downhole tool
Spend, ensure that its communication robust and adaptivity.Its communication speed can meet needed for industry, all surveys in addition to imaging logging
The communication need of well instrument.Eliminate complexity cable debugging, simplify operating process it is ensured that well logging result accuracy and
Reliability.Technique is a breakthrough of the single-core cable well testing of current oil field, well logging high speed transmission technology, will fill up domestic and be somebody's turn to do
One blank of class technology, have optimism promotes the use of prospect.
In the data transmission, due to exist signal interference, so each frequency band all include multiple cycles can be effectively
Opposing interference, but each frequency band includes the too many cycle and can affect the transfer rate of data again.Total according to practical experience
Knot, the amount of cycles of the waveform that each frequency band includes adopts 5～10, both can ensure that the reliability of transmission data, and might be used again
To ensure to meet the transfer rate being actually needed.
In addition, the size of described 8 frequencies can affect transfer rate and the accuracy of data, the less accuracy of frequency is higher
But speed is slower, but the frequency more faster accuracy of high speed, through practice test, using 10000～12000hz's
Frequency band is optimal, both can ensure that the transmission speed of data, and disclosure satisfy that the needs of the data precision of downhole testing again, according to
Statistics is using the frequency band bit error rate as little as 10-6 of embodiment shown in Fig. 1.
Described specific waveforms can be the square-wave waveform of a cycle predeterminated frequency, for example, adopt one as shown in Figure 2
The square wave of the 1000hz in individual cycle is as the synchronous initial code of signal.
In sum, present disclosure is not limited in the above embodiments, and those skilled in the art can be
Within the technological guidance's thought of the present invention, other embodiments are proposed, but this embodiment be included in the scope of the present invention it
Interior.
Claims (3)
1. a kind of data transmission method for the long cable communication of down-hole single it is characterised in that:
Using coding rule be to be divided into two groups of a, b that data is encoded the frequency different using 8, every group 4, a group
One of one of frequency and b group combination of frequency represent a particular code, formation altogether includes 0～9, arithmetic point, odd number
Identifying code, even number identifying code, totally 16 codes of the negative value symbol of frequency over range, on off control instruction and standby code；
During transmission data, send the synchronous initial code as signal for the square-wave waveform of a cycle predeterminated frequency, Ran Hougen first
Send code according to coding rule, each code is made up of two frequency bands corresponding with described coding rule, and each frequency band is equal
Waveform including quantity identical multiple cycle.
2. the data transmission method for the long cable communication of down-hole single according to claim 1 it is characterised in that each
The amount of cycles of the waveform that frequency band includes is 5～10.
3. the data transmission method for the long cable communication of down-hole single according to claim 1 and 2 it is characterised in that
The numerical value of described 8 frequencies is all between 10000hz and 12000hz.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410417915.2A CN104314557B (en) | 2014-08-23 | 2014-08-23 | Data transmission method for underground single-core long cable communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410417915.2A CN104314557B (en) | 2014-08-23 | 2014-08-23 | Data transmission method for underground single-core long cable communication |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104314557A CN104314557A (en) | 2015-01-28 |
| CN104314557B true CN104314557B (en) | 2017-02-01 |
Family
ID=52369852
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410417915.2A Active CN104314557B (en) | 2014-08-23 | 2014-08-23 | Data transmission method for underground single-core long cable communication |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104314557B (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2002103944A1 (en) * | 2001-06-19 | 2002-12-27 | Baker Hughes Incorporated | Full duplex dmt modulation in well-logging applications |
| EP1650401A2 (en) * | 1998-12-02 | 2006-04-26 | Halli Burton Energy Services, Inc. | High-power well logging method and apparatus |
| CN101158284A (en) * | 2007-11-05 | 2008-04-09 | 聂泳培 | Single-core cable well logging data high speed transmission system |
| CN102510326A (en) * | 2011-12-15 | 2012-06-20 | 西安思坦仪器股份有限公司 | Full-duplex communication method based on single-core electric cables |
| CN102843166A (en) * | 2012-08-03 | 2012-12-26 | 北京航空航天大学 | Device and method for underground long-distance transmission of Manchester code |
| CN202850989U (en) * | 2012-09-21 | 2013-04-03 | 中国海洋石油总公司 | High speed data transmission system based on single-core logging cable |
| CN203721372U (en) * | 2014-02-21 | 2014-07-16 | 西安弘传科技开发有限责任公司 | Deep well high-speed data transmission system cable |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7061932B2 (en) * | 2002-11-06 | 2006-06-13 | Halliburton Energy Services, Inc. | Code-division multiple-access (CDMA) wireline telemetry system |
-
2014
- 2014-08-23 CN CN201410417915.2A patent/CN104314557B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1650401A2 (en) * | 1998-12-02 | 2006-04-26 | Halli Burton Energy Services, Inc. | High-power well logging method and apparatus |
| WO2002103944A1 (en) * | 2001-06-19 | 2002-12-27 | Baker Hughes Incorporated | Full duplex dmt modulation in well-logging applications |
| CN101158284A (en) * | 2007-11-05 | 2008-04-09 | 聂泳培 | Single-core cable well logging data high speed transmission system |
| CN102510326A (en) * | 2011-12-15 | 2012-06-20 | 西安思坦仪器股份有限公司 | Full-duplex communication method based on single-core electric cables |
| CN102843166A (en) * | 2012-08-03 | 2012-12-26 | 北京航空航天大学 | Device and method for underground long-distance transmission of Manchester code |
| CN202850989U (en) * | 2012-09-21 | 2013-04-03 | 中国海洋石油总公司 | High speed data transmission system based on single-core logging cable |
| CN203721372U (en) * | 2014-02-21 | 2014-07-16 | 西安弘传科技开发有限责任公司 | Deep well high-speed data transmission system cable |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104314557A (en) | 2015-01-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104486012B (en) | A kind of environmental frequencies detection and automatic frequency-hopping system and method | |
| CN102693567B (en) | Coding-decoding method based on communication of access control system | |
| CN101015147A (en) | Downhole telemetry system for wired tubing | |
| CN103899301A (en) | Wireless measurement while drilling system and method | |
| CN101158284A (en) | Single-core cable well logging data high speed transmission system | |
| CN204357427U (en) | Shaft bottom test data is wireless ground direct-reading system | |
| CN102076026B (en) | Sounding reference signal transmitting method, device and terminal | |
| CN101951279A (en) | Power line carrier communication method for oil field underground testing and adjusting equipment | |
| CN104314557B (en) | Data transmission method for underground single-core long cable communication | |
| CN104243583A (en) | Environment parameter collecting and remote transmitting system of linear oil extraction motor | |
| CN103078402B (en) | High-voltage cable partial-discharge quantity-of-state networking measurement time precise synchronizing method | |
| CN107682047B (en) | Channel-aware medium-voltage power line communication data transmission method | |
| CN217712519U (en) | Layering water injection system based on wave code communication | |
| CN103812610A (en) | Data communication method, terminal and information safety equipment | |
| CN204244251U (en) | A kind of monitoring circuit of RS485 bus | |
| CN102817607A (en) | Underground communication system of continuous pipe drill | |
| CN102510326A (en) | Full-duplex communication method based on single-core electric cables | |
| CN106936541A (en) | RS codings plus byte-interleaved method and system | |
| CN114070759B (en) | Transmission method, fluid meter and corresponding computer readable medium | |
| CN105637956A (en) | Access network node and paging method | |
| CN209129603U (en) | A kind of logging cable high-speed data communications device | |
| US20130037260A1 (en) | Systems and Methods for Downhole Communications Using Power Cycling | |
| CN211692449U (en) | Single core cable transmission device of high-reliability self-adaptation rate adjustment | |
| CN103117804A (en) | Method of multi-channel communication between electrical cable detecting device and acquiring device | |
| CN105443116B (en) | A kind of method and circuit of downhole instrument and ground data intercommunication |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20210804 Address after: 100007 No. 9 North Main Street, Dongcheng District, Beijing, Dongzhimen Patentee after: CHINA NATIONAL PETROLEUM Corp. Patentee after: CNPC Bohai Drilling Engineering Co.,Ltd. Address before: 300457 Tianjin Binhai New Area Development Zone Huanghai Road 106 Bohai Drilling Engineering Co., Ltd. science and Technology Development Office Patentee before: CNPC Bohai Drilling Engineering Co.,Ltd. |