CN106850477A - A kind of underground signal modulator approach and device - Google Patents
A kind of underground signal modulator approach and device Download PDFInfo
- Publication number
- CN106850477A CN106850477A CN201710069342.2A CN201710069342A CN106850477A CN 106850477 A CN106850477 A CN 106850477A CN 201710069342 A CN201710069342 A CN 201710069342A CN 106850477 A CN106850477 A CN 106850477A
- Authority
- CN
- China
- Prior art keywords
- modulation
- signal
- phase
- shift keying
- code check
- 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.)
- Granted
Links
- 238000013459 approach Methods 0.000 title claims abstract description 17
- 238000010008 shearing Methods 0.000 claims abstract description 31
- 238000005553 drilling Methods 0.000 claims abstract description 28
- 238000000034 method Methods 0.000 claims abstract description 22
- 238000005259 measurement Methods 0.000 claims abstract description 13
- 230000008569 process Effects 0.000 claims abstract description 11
- 238000004519 manufacturing process Methods 0.000 claims abstract description 9
- 229910002056 binary alloy Inorganic materials 0.000 claims description 36
- 230000010363 phase shift Effects 0.000 claims description 24
- 230000000069 prophylactic effect Effects 0.000 claims description 21
- 230000008859 change Effects 0.000 claims description 10
- 230000005540 biological transmission Effects 0.000 abstract description 28
- 230000000694 effects Effects 0.000 abstract description 14
- 230000002829 reductive effect Effects 0.000 abstract description 9
- 239000012530 fluid Substances 0.000 description 11
- 230000009286 beneficial effect Effects 0.000 description 6
- 230000015572 biosynthetic process Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- 238000012546 transfer Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 239000000306 component Substances 0.000 description 2
- 239000008358 core component Substances 0.000 description 2
- 230000003628 erosive effect Effects 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 230000000670 limiting effect Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000001228 spectrum Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 239000002173 cutting fluid Substances 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 238000005562 fading Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000036039 immunity Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000003032 molecular docking Methods 0.000 description 1
- 230000035772 mutation Effects 0.000 description 1
- 210000002445 nipple Anatomy 0.000 description 1
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 description 1
- 230000003534 oscillatory effect Effects 0.000 description 1
- 230000036961 partial effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 230000003595 spectral effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/0008—Modulated-carrier systems arrangements for allowing a transmitter or receiver to use more than one type of modulation
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK 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
- E21B47/14—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 using acoustic waves
- E21B47/18—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 using acoustic waves through the well fluid, e.g. mud pressure pulse telemetry
- E21B47/20—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 using acoustic waves through the well fluid, e.g. mud pressure pulse telemetry by modulation of mud waves, e.g. by continuous modulation
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/02—Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation
- H04L27/04—Modulator circuits; Transmitter circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/10—Frequency-modulated carrier systems, i.e. using frequency-shift keying
- H04L27/12—Modulator circuits; Transmitter circuits
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/18—Phase-modulated carrier systems, i.e. using phase-shift keying
- H04L27/20—Modulator circuits; Transmitter circuits
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Remote Sensing (AREA)
- Geophysics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Acoustics & Sound (AREA)
- Computer Networks & Wireless Communication (AREA)
- Geophysics And Detection Of Objects (AREA)
- Near-Field Transmission Systems (AREA)
Abstract
The invention discloses a kind of underground signal modulator approach and device, the method includes：The measurement signal under production wells in drilling process；According to drillng operation condition and requiring selecting modulation mode, and underground survey signal is modulated according to selected modulation system；Wherein, the underground survey signal after modulation is used to control shearing valve type mud pulse generator.By the solution of the present invention, according to drillng operation condition and selecting modulation mode can be required, reduce signal distortion degree, on the premise of demodulation effect is ensured, signal fundamental frequency be reduced to greatest extent, improve message transmission rate；And influence of the channel to mud pressure wave attenuation is reduced to greatest extent, has effectively evaded the influence that pump is made an uproar to signal, reduce de-noising difficulty.
Description
Technical field
The present invention relates to logging while drilling technology, more particularly to a kind of underground signal modulator approach and device.
Background technology
Mud-pulse the spread of the rumours system is measurement while drilling (Measure While Drilling, abbreviation MWD) and well logging
Important component in (Logging While Drilling, abbreviation LWD) equipment, is that down-hole information is transferred to ground in real time
The approach in face, by impulse generator, transmission pipeline, ground acquisition demodulating system composition.Wherein impulse generator is pulse generation
Device, is series in connector for logging while drilling string as an independent pipe nipple, and transmission pipeline is the slurry channel in drill string, ground
Face is gathered demodulating system and is demodulated by pressure sensor collection mud pressure signal, finally gives each log parameter.With
Formation evaluation technology is continued to develop, and downhole data amount is gradually increasing, and the transmission rate of mwd system is increasingly becoming restriction underground
The bottleneck that data are uploaded, two-forty MWD (Measurement While Drilling) data transmission system turns into a kind of necessity.
Shear valve pulser core component described herein be rotor, valve block in underground by shearing the fluid in drill string,
Using the water hammer effect of fluid, mud is set to produce pressure fluctuation.
Flow regime of the fluid in drill string is generally turbulent condition, and the mud pressure in drill string can produce fluctuation.Rotor is cut
Waterpower torque suffered when cutting fluid has fluctuation, causes impulse generator larger to motor torque and instantaneous power demands.From
For this point, the ride comfort of the requirement of underground pressure wave will get well, and can to greatest extent reduce the power of motor.
In drilling process, with geological conditions, drilling depth changes, corresponding mud pumpage, mud viscosity etc.
Will be with its change.It is easy to the pressure waveform of earth's surface demodulation in order to produce, enough pressure wave amplitudes should be ensured, again
Make that the uniformity of whole pressure wave is good, characteristic is obvious.
How the underground signal that will be measured, be transmitted by suitable modulation system, to reduce signal distortion degree,
On the premise of ensureing demodulation effect, signal fundamental frequency is reduced to greatest extent, improve message transmission rate；And drop to greatest extent
Influence of the low channel to mud pressure wave attenuation, effectively evades the influence that pump is made an uproar to signal, and it is of the invention to reduce de-noising difficulty
Research emphasis.
The content of the invention
In order to solve the above problems, the present invention proposes a kind of underground signal modulator approach and device, can reduce signal
Distortion degree, improves message transmission rate, and reduces influence of the channel to mud pressure wave attenuation to greatest extent, effectively evades
The influence that pump is made an uproar to signal, reduces de-noising difficulty.
In order to achieve the above object, the present invention proposes a kind of underground signal modulator approach, and the method includes：
The measurement signal under production wells in drilling process；
According to drillng operation condition and require selecting modulation mode, and underground survey is believed according to selected modulation system
Number it is modulated；
Wherein, the underground survey signal after modulation is used to control shearing valve type mud pulse generator.
Alternatively, drillng operation condition includes：Hole condition and pump are made an uproar；
Drillng operation is required to include：Code check requirement；
Modulation system includes：Amplitude-shift keying modulation system, phase-shift keying (PSK) modulation system and shift keying modulation mode.
Alternatively, according to drillng operation condition and requiring that selecting modulation mode includes：
Meet default easy prophylactic iedex and code check requirement and be more than or wait when operating mode meets default operating mode standard, pump and makes an uproar
When default first code check threshold value, amplitude-shift keying modulation system is selected；
When operating mode is unsatisfactory for default operating mode standard, pump and makes an uproar to be unsatisfactory for default easy prophylactic iedex and code check requirement is more than
Or during equal to default second code check threshold value, select shift keying modulation mode；Wherein, the second code check threshold value is less than the first code check
Threshold value；
When operating mode is unsatisfactory for default operating mode standard, pump and makes an uproar to be unsatisfactory for default easy prophylactic iedex and code check requirement is less than
During the second code check threshold value, phase-shift keying (PSK) modulation system or shift keying modulation mode are selected.
Alternatively, phase-shift keying (PSK) modulation system includes：Zero point phase modulation, wait phase modulation and multicycle phase modulation.
Zero point phase modulation refers to：Change phase at the dead-center position of carrier waveform；
Wait phase modulation refer to：The phase modulation time is reserved within each carrier waveform cycle, each carrier waveform cycle includes
Signal section and phase modulation part；
Multicycle phase modulation refers to：Modulated using multicycle signal element in signal section；Used and signal element in phase modulation part
It is modulated with the waveform of frequency or half frequency.
Alternatively,
The implementation of zero point phase modulation includes：Single sinusoidal waveform complete cycle in carrier wave is changed to differ 180 by phase
The sinusoidal waveform of degree is alternate to be put together.
Waiting the implementation of phase modulation includes：Current phase is kept if the phase of the front and rear waveform of carrier wave is identical not
Become, phase modulation is carried out in the phase modulation part of each wave period if the phase of the front and rear waveform of carrier wave is differed；
The implementation of multicycle phase modulation includes：Adjusted using homogenous frequency signal if the phase of the front and rear waveform of carrier wave is identical
Phase, uses half-frequency signal phase modulation if the phase of the front and rear waveform of carrier wave is differed.
Alternatively, shift keying modulation mode includes：Binary system half period CPFSK modulation systems, binary system complete period
CPFSK modulation systems and quaternary CPFSK modulation systems.
Binary system half period CPFSK modulation systems refer to：Half period and complete period sinusoidal waveform is respectively adopted as modulation
Signal；
Binary system complete period CPFSK modulation systems refer to：The binary system half period is substituted using complete sinusoidal waveform
Half period sine wave in CPFSK modulation systems；
Quaternary CPFSK modulation systems refer to：00,01,10,11 4 are modulated respectively using four kinds of sine waves of different frequency
Individual data.
In order to achieve the above object, the invention allows for a kind of underground signal modulating device, underground signal modulation dress
Put including：Signal acquisition module and signal modulation module.
Signal acquisition module, for the measurement signal under production wells in drilling process；
Signal modulation module, for according to drillng operation condition and requiring selecting modulation mode, and according to selected institute
Modulation system is stated to be modulated underground survey signal；
Wherein, the underground survey signal after modulation is used to control shearing valve type mud pulse generator.
Alternatively, drillng operation condition includes：Hole condition and pump are made an uproar；
Drillng operation is required to include：Code check requirement；
Modulation system includes：Amplitude-shift keying modulation system, phase-shift keying (PSK) modulation system and shift keying modulation mode.
Alternatively, signal modulation module is according to drillng operation condition and requires that selecting modulation mode includes：
Meet default easy prophylactic iedex and code check requirement and be more than or wait when operating mode meets default operating mode standard, pump and makes an uproar
When default first code check threshold value, amplitude-shift keying modulation system is selected；
When operating mode is unsatisfactory for default operating mode standard, pump and makes an uproar to be unsatisfactory for default easy prophylactic iedex and code check requirement is more than
Or during equal to default second code check threshold value, select shift keying modulation mode；Wherein, the second code check threshold value is less than the first code check
Threshold value；
When operating mode is unsatisfactory for default operating mode standard, pump and makes an uproar to be unsatisfactory for default easy prophylactic iedex and code check requirement is less than
During the second code check threshold value, phase-shift keying (PSK) modulation system or shift keying modulation mode are selected.
Alternatively, phase-shift keying (PSK) modulation system includes：Zero point phase modulation, wait phase modulation and multicycle phase modulation.
Zero point phase modulation refers to：Change phase at the dead-center position of carrier waveform.
Wait phase modulation refer to：The phase modulation time is reserved within each carrier waveform cycle, each carrier waveform cycle includes
Signal section and phase modulation part.
Multicycle phase modulation refers to：Modulated using multicycle signal element in signal section；Used and signal element in phase modulation part
It is modulated with the waveform of frequency or half frequency.
Shift keying modulation mode includes：Binary system half period CPFSK modulation systems, binary system complete period CPFSK modulation
Mode and quaternary CPFSK modulation systems.
Binary system half period CPFSK modulation systems refer to：Half period and complete period sinusoidal waveform is respectively adopted as modulation
Signal.
Binary system complete period CPFSK modulation systems refer to：Binary system half period CPFSK is substituted using complete sinusoidal waveform
Half period sine wave in modulation system.
Quaternary CPFSK modulation systems refer to：00,01,10,11 4 are modulated respectively using four kinds of sine waves of different frequency
Individual data.
Compared with prior art, the present invention includes：The measurement signal under production wells in drilling process；According to drillng operation bar
Part and selecting modulation mode is required, and underground survey signal is modulated according to selected modulation system；Wherein, after modulation
Underground survey signal be used for control shearing valve type mud pulse generator.By the solution of the present invention, can be made according to drilling well
Industry condition and selecting modulation mode is required, reduce signal distortion degree, on the premise of demodulation effect is ensured, dropped to greatest extent
Low signal fundamental frequency, improves message transmission rate；And channel is reduced to greatest extent to mud pressure wave attenuation
Influence, has effectively evaded the influence that pump is made an uproar to signal, reduces de-noising difficulty.
Brief description of the drawings
The accompanying drawing in the embodiment of the present invention is illustrated below, the accompanying drawing in embodiment be for it is of the invention enter one
Step understanding, is used to explain the present invention together with specification, does not constitute limiting the scope of the invention.
Fig. 1 is the underground signal modulator approach flow chart of the embodiment of the present invention；
Fig. 2 is conventional shearing valve type mud pulse generator fundamental diagram；
Fig. 3 is the zero point phase modulation PSK modulation waveform schematic diagrames of the embodiment of the present invention；
Fig. 4 is the zero point zero-speed phase modulation PSK modulation waveform schematic diagrames of the embodiment of the present invention；
Fig. 5 is the underground signal modulating device composition frame chart of the embodiment of the present invention.
Specific embodiment
For the ease of the understanding of those skilled in the art, the invention will be further described below in conjunction with the accompanying drawings, not
Can be used for limiting the scope of the invention.
Herein described problem is, how by underground survey signal, to be transmitted by suitable modulation system, such tune
Mode processed can become apparent from signal characteristic, improve signal to noise ratio, be beneficial to the demodulating system demodulation of earth's surface；Signal distortion can be reduced
Degree, improves message transmission rate, and reduces influence of the channel to mud pressure wave attenuation to greatest extent, effectively evades pump and makes an uproar
Influence to signal, reduces de-noising difficulty.
In order to achieve the above object, the present invention proposes a kind of underground signal modulator approach, as shown in figure 1, the method bag
Include step S101-S102：
S101, the measurement signal under production wells in drilling process.
In embodiments of the present invention, Fig. 2 is shearing valve type mud pulse generator fundamental diagram.As shown in Fig. 2 boring
During entering, underground survey sensor measures engineering parameter and formation parameter, and the parameter that these are measured is analog signal, by number
It is data signal according to coder transitions.The data signal is the underground survey signal described in the embodiment of the present invention.Data signal
By controlling circuit to be modulated (modulator approach is sent to control circuit by the underground signal modulating device of the embodiment of the present invention),
The control signal of drive circuit is generated after modulation.The control signal is passed into drive circuit, drive circuit is believed according to the control
Number drive motor motion, motor is moved according to the given control signal of control circuit, drives mud pulse generator
Rotor rotates or swings, and the rotor of mud pulse generator shears the fluid for flowing through, and produces pulse signal, these pulses letter
Number, by drill pipe transmission to ground standpipe, data collecting system carries out pressure signal and adopts to pressure sensor on the standpipe of ground
Collection, is parsed by demodulating system to the pressure signal of underground, and the mud pulse signal that transmission comes up is converted to underground engineering
Parameter and formation parameter.
S102, according to drillng operation condition and selecting modulation mode is required, and according to selected modulation system to underground
Measurement signal is modulated.
Drill rod telemetry system is supported for directed drilling is oriented to offer formation data in real time, in order to carry to guiding and geological analysis
For more rich real time data, it is necessary to the data transmission system of two-forty in real time transmits downhole logging instruments data measured in time
To ground, and the high data rate that the key technology in this high speed data transfers system is described in the embodiment of the present invention is adjusted
Mode processed, is described in detail below based on drilling well present situation to the modulation system of the embodiment of the present invention.
In embodiments of the present invention, shearing valve type mud pulse generator core component is rotor, and valve block is logical in underground
The fluid crossed in shearing drill string, using the water hammer effect of fluid, makes mud produce pressure fluctuation.Flowing shape of the fluid in drill string
State is generally turbulent condition, and the mud pressure in drill string can produce fluctuation.Suffered waterpower torque has fluctuation during rotor shearing fluid,
Cause shearing valve type mud pulse generator larger to motor torque and instantaneous power demands.From for this point, underground pressure
The ride comfort of the requirement of Reeb will get well, and can to greatest extent reduce the power of motor.In addition, in drilling process,
With geological conditions, drilling depth changes, corresponding mud pumpage, and mud viscosity etc. also will be with its change.In order to produce
The pressure waveform for being easy to earth's surface demodulation is born, enough pressure wave amplitudes should be ensured, the uniformity of whole pressure wave is made again
Good, characteristic is obvious.Analyzed based on more than, the underground survey signal demand for being gathered is transmitted by special modulation system, this
The modulation system of sample can become apparent from signal characteristic, improve signal to noise ratio, be beneficial to the demodulating system demodulation of earth's surface.And can drop
Low signal distortion degree, on the premise of demodulation effect is ensured, reduces signal fundamental frequency to greatest extent, improves data transfer speed
Rate；Influence of the channel to mud pressure wave attenuation is reduced to greatest extent, effectively evades the influence that pump is made an uproar to signal, reduce de-noising difficult
Degree.
In embodiments of the present invention, the spectral characteristic of different modulating mode is different, and the anti-noise ability of different modulating mode is not
Together, in different noise circumstances, should targetedly selecting modulation mode.For stability contorting rotor, make the motion of rotor
Track meets above-mentioned requirements.It is accomplished by according to specific drillng operation condition and requires to change underground shearing valve type mud-pulse hair
The modulation system of raw device.
Alternatively, drillng operation condition includes：Hole condition and pump are made an uproar；Drillng operation is required to include：Code check requirement.
In embodiments of the present invention, current shearing valve type mud pulse generator is subject to external environment influence and drilling well
Some basic demands of operation include：
1st, shearing valve type mud pulse generator structure and mud channel have frequency selective characteristic, i.e., different frequency is believed
Number attenuation degree it is different, big frequency signal quality of decaying is poor, demodulates difficulty big.To ensure demodulation effect, should try one's best selection
The small frequency of decay is used as fundamental frequency.
2nd, lowest bit rate is required in engineering.Data transmission system purpose in the application is to pass underground logging data
Ground is transported to, and guides next step drilling well to use for point analysis hole condition such as explanation personnel and orientation well engineer.On needed for different wells
The parameter of biography is different, and data dot density is different, therefore required code check is also differed.On-the-spot meeting according to demand, provides lowest bit rate
It is required that.
3rd, signal spectrum main peak value should avoid main noise frequency, and such as pump is made an uproar frequency, the noise such as environmental electrical noise.So may be used
To reduce influence of the noise to signal, demodulation accuracy is improved.
Alternatively, modulation system includes：Amplitude-shift keying modulation system, phase-shift keying (PSK) modulation system and shift keying modulation side
Formula.
In embodiments of the present invention, from modulator approach, mainly there is amplitude-shift keying modulation system (amplitude-shift keying
Amplitude-Shift-Keying, abbreviation ASK), phase-shift keying (PSK) modulation system (phase-shift keying (PSK) Phase-Shift-Keying,
Abbreviation PSK) and shift keying modulation mode (frequency shift keying Frequency-Shift Keying, abbreviation FSK) etc., this several side
Basic modulation system in digital band pass Transmission system owned by France.But structure according to shearing valve type mud pulse generator and turn
The motion mode of son, and consider that above-mentioned drillng operation condition and requirement carry out carrier system control, it is necessary to further in more detail
The every kind of debud mode of ground planning.
Alternatively, according to drillng operation condition and require selecting modulation mode include following three kinds of situations：
Situation one, meet default easy prophylactic iedex and code check requirement when operating mode meets default operating mode standard, pump and makes an uproar
During more than or equal to default first code check threshold value, amplitude-shift keying modulation system is selected.
In embodiments of the present invention, if in drillng operation, hole condition preferably, pump is made an uproar, and (make an uproar and meet pre- for uniform easily elimination by pump
If easy prophylactic iedex), the code check data bits of transmission (when code check refers to data transfer unit interval) require it is higher, then can be with
(binary system on off keying On-Off Keying abbreviations OOK, OOK are a special cases of ASK modulation to selection OOK, an amplitude
0 is taken as, another amplitude is non-zero, is exactly OOK) modulation system, have compared to other two kinds of modulation systems under the code check
(phase-shift keying (PSK) and frequency shift keying) lower fundamental frequency, it is hereby achieved that bigger signal energy, and reduce shearing valve type mud
The abrasion of impulse generator.In embodiments of the present invention, operating mode standard can be pre-set, to check current working whether good
Good, specifically, the operating mode explanation operating mode for meeting default operating mode standard is good, is unsatisfactory for the operating mode explanation of default operating mode standard
Operating mode is poor.Furthermore it is also possible to code check threshold value is pre-set, the first code check threshold value described above, when code check requirement is more than or waits
When default first code check threshold value, illustrate that code check requirement is higher, when code check requirement is less than default first code check threshold value, say
The requirement of plain code rate is relatively low.It should be noted that specific operating mode standard and code check threshold value can be carried out according to different operations
Different settings, is not particularly limited herein.
Situation two, it is unsatisfactory for default operating mode standard, pump and makes an uproar to be unsatisfactory for default easy prophylactic iedex and code check when operating mode
It is required that when being more than or equal to default second code check threshold value, selecting shift keying modulation mode；Wherein, the second code check threshold value is less than
First code check threshold value.
In embodiments of the present invention, if in drillng operation, hole condition is general (operating mode is unsatisfactory for default operating mode standard),
Pump is made an uproar poor, and de-noising difficulty is big (pump is made an uproar and is unsatisfactory for default easy prophylactic iedex), and code check requirement is medium or higher, and FSK may be selected
Modulation system, the modulation system has the narrow characteristic of shared frequency band, easily avoids pump and makes an uproar and other noise frequency ranges, is easy to extraction to have
Effect signal, compared to other two kinds of modulation systems (amplitude-shift keying modulation system and phase-shift keying (PSK)), with more excellent demodulation effect.
Situation three, it is unsatisfactory for default operating mode standard, pump and makes an uproar to be unsatisfactory for default easy prophylactic iedex and code check when operating mode
It is required that when being less than the second code check threshold value, selecting phase-shift keying (PSK) modulation system or shift keying modulation mode.
In embodiments of the present invention, if in drillng operation, hole condition is general (operating mode is unsatisfactory for default operating mode standard),
Pump is made an uproar, and poor de-noising difficulty is big (pump is made an uproar and is unsatisfactory for default easy prophylactic iedex), and code check requirement is relatively low, and PSK modulation methods may be selected
Formula, the modulation system frequency is with low uncertainty, and waveform multiplicity is high, can greatly reduce because the wave distortion that frequency error factor is produced is to demodulation
The influence of effect.FSK modulation mode also may be selected in such cases, but OOK modulation systems should not be selected.Because of OOK modulation systems
Frequency band is wider, should not use frequency domain noise-eliminating method, and its noise immunity is poor, when hole condition is general, when other noises are complex,
Demodulation is easily caused to malfunction.
Every kind of modulation system is described in detail below.
Mode one, amplitude-shift keying, amplitude modulation mode transmits digital information using the changes in amplitude of carrier wave, in binary system amplitude key
In control modulation system, the amplitude of carrier wave only has two kinds of changes, and binary message " 0 " and " 1 " are corresponded to respectively.Control circuit is received
After data signal, first waveform is modulated into by 0,1 modulation is turned into the second waveform, waveform after modulation is exported to drive circuit.
If amplitude-shift keying to be expressed as the mode of baseband signal control carrier signal change, i.e.,：e2ASK(t)=s (t) b
T (), wherein b (t) are carrier wave, carrier wave may be selected sine wave, square wave, triangular wave etc..S (t) is baseband signal, is represented by：
Wherein：anIt is n-th level value of signal, can use an=1,0 represent different symbols；Also can use an=1, -1.
Ts is element duration；It is the base band pulse shape of Ts the duration that g (t) is；e2ASKWhen () represents binary system amplitude shift keying t
Domain signal.
Mode two, phase-shift keying (PSK), pm mode can carry out the modulation of data using the waveform of out of phase, according to this specially
The profit applied environment, need to design pm mode to ensure the phase continuity of signal, it is ensured that motor rotation weakens electricity without saltus step
Machine is shaken, and reduces wave distortion.
Wherein e2PSKT () represents binary phase shift keying signal, A is signal waveform, is expressed as signal angular frequencycWith n-th
The absolute phase of individual symbolFunction.
Alternatively, phase-shift keying (PSK) modulation system includes：Zero point phase modulation, wait phase modulation and multicycle phase modulation.
1st, zero point phase modulation refers to：Change phase at the dead-center position of carrier waveform.
Zero point pm mode, always changes phase at the dead-center position of waveform, if the data sequence for sending is an(n=
1st, 2,3 ..., n), using sinusoidal signal as modulation waveform, then the corresponding modulated signal of zero point phase modulation PSK modulation systems can table
It is shown as：
Wherein, 0≤t ＜ T, T are carrier cycle.
Therefore, waveform phase is 0 ° when sending data " 1 ", and waveform phase is 180 ° when sending data " 0 ", and modulation waveform is such as
Shown in Fig. 3.
Alternatively, the implementation of zero point phase modulation includes：Single sinusoidal waveform complete cycle in carrier wave is changed to by phase
The sinusoidal waveform of difference 180 degree is alternate to be put together.
In embodiments of the present invention, because the sine wave of standard has maximal rate in dead-center position, it is impossible to accomplish to smooth
Motor control, therefore consider to optimize modulation waveform in practical operation, it is necessary to ensure zero point speed be zero with ensure
Motor control quality.Specifically, single sinusoidal waveform complete cycle can be changed to be put together by upper and lower two sinusoidal waveforms,
Will be changed to that sinusoidal waveform by phase difference 180 degree is alternate to be put together by single sinusoidal waveform complete cycle in carrier wave, make it
It is zero in zero point speed, as shown in Figure 4.It should be noted that the method is only a specific embodiment of the invention, at other
In embodiment, other modes can also be used, it is any to enable to method that zero point speed is zero in the embodiment of the present invention
Within protection domain.
2nd, wait phase modulation refers to：The phase modulation time is reserved within each carrier waveform cycle, each carrier waveform cycle bag
Containing signal section and phase modulation part.
Pm mode is waited, the time that adds is the n phase modulation cycle of fundamental frequency cycles, and wherein n can use positive integer or fraction
.
Alternatively, waiting the implementation of phase modulation includes：Kept if the phase of the front and rear waveform of carrier wave is identical current
Phase invariant, phase modulation is carried out if the phase of the front and rear waveform of carrier wave is differed in the phase modulation part of each wave period.
In embodiments of the present invention, specific phase modulation waveform is also not limited to sinus wave patters, in other embodiments also
Other waveforms can be selected, it is any to disclosure satisfy that phase modulation in place, the waveform of phase continuity is kept in the embodiment of the present invention
Within protection domain.
3rd, multicycle phase modulation refers to：Signal modulation is carried out using multicycle signal element, mono signal unit cycle duration carries out phase
Position modulation, i.e., modulated in signal section using multicycle signal element；Phase modulation part use with signal element with frequency (or frequency multiplication) or
The waveform of half frequency (or odd-multiple of half frequency) is modulated.Or be interpreted as, by the length of a signal (such as one 0 or 1)
It is divided into n parts, first n-m parts is used for signal modulation, and latter m parts is used for phase modulation, and wherein n and m is positive integer, n ＞ m.
It should be noted that the signal element refers to a kind of prespecified signal waveform with predetermined time period, such as
The signal waveform of unit period；The signal waveform can be the random waveforms such as sine wave, triangular wave, square wave.
Multicycle pm mode (same waveform pm mode), similar with pm mode is waited, each symbol period includes letter
Number part and phase modulation part, wherein signal section can be modulated using multicycle signal element, if signal element frequency is ωb；Phase modulation portion
Point using with signal element with frequency (or frequency multiplication) or the waveform of half frequency (or odd-multiple of half frequency), i.e. n ωbOrWherein n
It is positive integer.
Alternatively, the implementation of multicycle phase modulation includes：Using same if the phase of the front and rear waveform of carrier wave is identical
Frequency signal phase modulation, uses half-frequency signal phase modulation if the phase of the front and rear waveform of carrier wave is differed.
Mode 3：Frequency shift keying, continuous phase mode of frequency regulation can be adjusted using the fundamental signal of different frequency to data
System, such as high-frequency signal modulation data " 1 ", low frequency modulations data " 0 ".
Alternatively, shift keying modulation mode includes：Binary system half period CPFSK (Continuous-Phase-
Frequency-Shift-Keying, Continuous phase frequency shift keying) modulation system, binary system complete period CPFSK modulation systems and
Quaternary CPFSK modulation systems.
1st, binary system half period CPFSK modulation systems refer to：Half period and complete period sinusoidal waveform is respectively adopted as tune
Signal processed；Binary system complete period CPFSK modulation systems refer to：The binary system half period is substituted using complete sinusoidal waveform
Half period sine wave in CPFSK modulation systems.
Binary system half period CPFSK modulation systems are respectively adopted half period and complete period sinusoidal waveform as modulated signal,
I.e. when a carrier cycle length is T, fundamental frequency is respectively 1/2T, 1/T.
Binary system complete period CPFSK modulation systems are to substitute binary system half period CPFSK tune using complete sinusoidal waveform
Half period sine wave in mode processed.I.e. as a symbol period length T, then two fundamental frequencies are respectively m/T, n/T；Wherein,
M, n are integer.
Refer to as modulated signal using half period and complete period sinusoidal waveform：The low frequency signal cycle is long, using the half period
Represent symbol (as represented " 1 "), high-frequency signal cycle is short, using representing a symbol complete cycle (as represented " 0 ").
Binary Frequency Shift Keying modulation system is represented by the signal that is shown below：
Wherein：A represents modulation waveform, can be the waveforms such as sine wave, triangular wave.The waveform is frequencies omega and start-phase
Function.Two kinds of symbols select the signal of different frequency, i.e. ω is different.Two kinds of start-phases of symbol are determined as neededTool
Body method is described after quaternary CPFSK.
2nd, quaternary CPFSK modulation systems refer to：00,01,10,11 are modulated respectively using four kinds of sine waves of different frequency
Four data.
Quaternary CPFSK modulation systems modulate 00,01,10,11 four group respectively using the sine wave of four kinds of different frequencies
Data, expression formula can be expressed as follows：
Can be using the frequency in multiple proportion as fundamental frequency, such as ω, 2 ω, 4 ω, 8 ω Hz；Also can be using frequency at equal intervals
As fundamental frequency, such as ω, ω+n, ω+2n, ω+3n；Or other modes choose fundamental frequency, such as ω1, ω2, ω3, ω4.No matter what is used
Fundamental frequency is planted, intersymbol phase continuity before and after being both needed to consider keeps phase continuity, can reduce motor control difficulty, drops
Low wave distortion, beneficial to demodulation.
Solution on phase continuity, if the start-phase of each symbol and end phase all same, and distinct symbols
Start-phase it is also identical, then signal directly have continuous phase；If in the presence of certain or certain several symbol start-phases with terminate
Opposite in phase, mutually can represent a symbol using same frequency in two kinds of waveforms of opposite phase, during modulated signal, selection starting
The end phase identical waveform of phase and previous sign bit as the sign bit modulation waveform.
In sum, the modulation system of the embodiment of the present invention has the advantage that：
1st, the phase continuity of signal ensure that motor has relatively stable transient current, so as to ensure that its stabilization
Power so that motor is easily controllable, and then ensure that signal occurs quality.
2nd, the waveform continuity of signal causes that the mutation in signal is few, and high fdrequency component is few, and mud transmission channel has low pass
The characteristic of filtering, signal has preferable waveform continuity, and effectively letter could be to greatest extent retained in mud transmission channel
Number, reduce influence of the fading channel to signal quality.
3rd, partial modulation mode employs multicycle signal modulation, can greatly weaken the repercussions influence of preceding sequential signal,
It is easy to demodulation.
4th, the modulation system of the embodiment of the present invention coordinates corresponding demodulation method, is capable of achieving the real-time of more than 6bps two-forties
Signal transmission.
5th, the modulation system of the embodiment of the present invention is beneficial to signal transacting, with narrower frequency band range, can easily root
Made an uproar frequency spectrum according to needing to avoid pump, be easy to denoising Processing.
6th, the modulation system of the embodiment of the present invention can be with parametric control, including frequency, waveform, the parameter such as amplitude, is beneficial to
According to actual conditions, by passing system under instruction, flexible switch modulation mode, more efficiently using the underground time of instrument, and
When according to demodulation effect adjustment modulation system.
In embodiments of the present invention, the underground survey signal after modulation is used to control shearing valve type mud pulse generator.
Based on above-mentioned Different Modulations, after suitable modulation system is selected, just can be according to the tune selected
Mode processed controls shear valve slurry pulsator.
As the formation evaluation PARAMETERSInstrument that underground mounts is more and more, the requirement to the data transmission rate in well logging
Also improve constantly, it is necessary to transmission rate is higher, more structurally sound signal the spread of the rumours system.At present, the side transmitted using mud-pulse
Method is more reliable, the transmission means being most widely used in numerous down-hole information transmission means.
The rotor reciprocally swinging shearing fluid of mud pulse generator impulse mechanism, this reciprocally swinging shears fluid
Rotor motion speed, carrier frequency is high, and the mud pulse generator based on this kind of principle belongs to two-forty mud-pulse
Generator.Specifically, the impulse mechanism of two-forty mud pulse generator is made up of rotor and stator, the motion shape of rotor
Formula has two kinds of rotary motion and reciprocating motion, and in two kinds of forms of motion, rotor is all that shearing fluid produces pressure pulse, such
Mud pulse generator is referred to as shearing valve type mud pulse generator.By two-forty mud pulse generator, ground data acquisition
And demodulation software constitutes complete system and is referred to as two-forty mud-pulse the spread of the rumours system.
In summary, shearing valve type mud pulse generator rotates cutting mud liquid level by rotor, makes to be produced in mud
Continuous pressure ripple, is transmitted to ground by mud runner.Modulation system described in the embodiment of the present invention is applied to the set shearing valve type
Mud pulse generator.
Shearing valve type mud pulse generator is limited, institute by motor control by slurry erosion and motor power consumption moment of torsion etc.
Sending pressure wave frequencies can not be too high, while it is that continuous phase is connected to reduce signal distortion degree to need waveform to try one's best.This hair
Modulation system described in bright embodiment can ensure demodulation effect, be reached between higher data transmission rate and adaptation motor control ability
To optimum balance.
Mud-pulse Transmission system has more limitation to data modulation equivalent to a low pass channel, and the present invention is real
The example modulation system is applied suitable for this kind of low pass channel, influence of the channel to mud pressure wave attenuation is reduced to greatest extent.And
And the characteristic of the continuous phase in the modulation system of the embodiment of the present invention can to greatest extent reduce signal distortion in the channel.
In addition, shearing valve type mud pulse generator rotor is influenceed and motor by motor control by mud medium condition
Energy power restriction, it is desirable to which modulation system has continuous phase, and flutter rate can not be too fast.This modulation system can ensure signal matter
On the premise of amount and demodulation effect, signal fundamental frequency is reduced to greatest extent, improve message transmission rate.
MWD (Measurement While Drilling) data transmission system is transmitted using mud-pulse mode, and traditional has the modes such as positive pulse, negative pulse, correspondence
Modulation system have PI yards (Pulse Interval, pulse sequence coding) and PA yards of (Pulse Amplitude, impulse amplitude
Coding) etc. modulation system, it is adaptable to needle valve pulser, be capable of achieving 1bps stabilization transmit, can reach 3bps transmission rates.
Shearing valve type mud pulse generator can equally produce positive pulse waveform by rotor swing, therefore, PI yards is also fitted with PA yards
For shearing valve type mud pulse generator described herein.Because of the flexibility of oscillatory valve, can occur than needle valve pulser more
High-frequency pulse signal, empirical tests, highest can realize 6bps transmission rates.Therefore it is comprehensive to use raw modulation mode and this paper
The high rate modulation mode, is capable of achieving the modulation of shearing valve type mud pulse generator low bit- rate gamut signal high.
In order to achieve the above object, the invention allows for a kind of underground signal modulating device 1, as shown in figure 5, the underground
Modulating apparatus include：Signal acquisition module 11 and signal modulation module 12.
Signal acquisition module 11, for the measurement signal under production wells in drilling process.
Signal modulation module 12, for according to drillng operation condition and requiring selecting modulation mode, and according to selected
The modulation system is modulated to underground survey signal；Wherein, the underground survey signal after modulation is used to control shearing valve type
Mud pulse generator.
Alternatively, drillng operation condition includes：Hole condition and pump are made an uproar；
Drillng operation is required to include：Code check requirement；
Modulation system includes：Amplitude-shift keying modulation system, phase-shift keying (PSK) modulation system and shift keying modulation mode.
Alternatively, signal modulation module 12 is according to drillng operation condition and requires that selecting modulation mode includes：
Meet default easy prophylactic iedex and code check requirement and be more than or wait when operating mode meets default operating mode standard, pump and makes an uproar
When default first code check threshold value, amplitude-shift keying modulation system is selected；
When operating mode is unsatisfactory for default operating mode standard, pump and makes an uproar to be unsatisfactory for default easy prophylactic iedex and code check requirement is more than
Or during equal to default second code check threshold value, select shift keying modulation mode；Wherein, the second code check threshold value is less than the first code check
Threshold value；
When operating mode is unsatisfactory for default operating mode standard, pump and makes an uproar to be unsatisfactory for default easy prophylactic iedex and code check requirement is less than
During the second code check threshold value, phase-shift keying (PSK) modulation system or shift keying modulation mode are selected.
Alternatively, phase-shift keying (PSK) modulation system includes：Zero point phase modulation, wait phase modulation and multicycle phase modulation.
Zero point phase modulation refers to：Change phase at the dead-center position of carrier waveform.
Wait phase modulation refer to：The phase modulation time is reserved within each carrier waveform cycle, each carrier waveform cycle includes
Signal section and phase modulation part.
Multicycle phase modulation refers to：Modulated using multicycle high-frequency signal in signal section, its medium-high frequency refers to higher than code check
Fundamental frequency；It is modulated with the waveform of frequency or half frequency using with signal in phase modulation part.
Shift keying modulation mode includes：Binary system half period CPFSK modulation systems, binary system complete period CPFSK modulation
Mode and quaternary CPFSK modulation systems.
Binary system half period CPFSK modulation systems refer to：Half period and complete period sinusoidal waveform is respectively adopted as modulation
Signal.
Binary system complete period CPFSK modulation systems refer to：Binary system half period CPFSK is substituted using complete sinusoidal waveform
Half period sine wave in modulation system.
Quaternary CPFSK modulation systems refer to：00,01,10,11 4 are modulated respectively using four kinds of sine waves of different frequency
Individual data.
Compared with prior art, the present invention includes：The measurement signal under production wells in drilling process；According to drillng operation bar
Part and selecting modulation mode is required, and underground survey signal is modulated according to selected modulation system；Wherein, after modulation
Underground survey signal be used for control shearing valve type mud pulse generator.By the solution of the present invention, can be made according to drilling well
Industry condition and selecting modulation mode is required, reduce signal distortion degree, on the premise of demodulation effect is ensured, dropped to greatest extent
Low signal fundamental frequency, improves message transmission rate；And channel is reduced to greatest extent to mud pressure wave attenuation
Influence, has effectively evaded the influence that pump is made an uproar to signal, reduces de-noising difficulty.
Modulation system described in the present embodiment, has taken into full account work of the drilling engineering parameter to underground slurry pulse generator
The influence of state, and mud channel, pump such as are made an uproar at the interference that docking collects mail number；Have the advantages that parameterisable is controlled simultaneously, can
With according to hole condition demand, real-time adjustment modulation system relevant parameter so that receiving terminal signal to noise ratio is tried one's best height, beneficial to demodulation；Or
Can be under demodulation case in signal, adjusting parameter weakens mud to erosion of valve block etc. reducing motor power consumption as far as possible.
It should be noted that embodiment described above be for only for ease of it will be understood by those skilled in the art that, and
It is not used in and limits the scope of the invention, on the premise of inventive concept of the invention is not departed from, those skilled in the art couple
Any obvious replacement made of the invention and improvement etc. are within protection scope of the present invention.
Claims (10)
1. a kind of underground signal modulator approach, it is characterised in that methods described includes：
The measurement signal under production wells in drilling process；
According to drillng operation condition and requiring selecting modulation mode, and the underground is surveyed according to the selected modulation system
Amount signal is modulated；
Wherein, the underground survey signal after modulation is used to control shearing valve type mud pulse generator.
2. underground signal modulator approach as claimed in claim 1, it is characterised in that
The drillng operation condition includes：Hole condition and pump are made an uproar；
The drillng operation is required to include：Code check requirement；
The modulation system includes：Amplitude-shift keying modulation system, phase-shift keying (PSK) modulation system and shift keying modulation mode.
3. underground signal modulator approach as claimed in claim 2, it is characterised in that described according to drillng operation condition and requirement
Selecting modulation mode includes：
Meet default easy prophylactic iedex and the code check requirement when the operating mode meets default operating mode standard, the pump and makes an uproar
During more than or equal to default first code check threshold value, the amplitude-shift keying modulation system is selected；
When the operating mode is unsatisfactory for default operating mode standard, the pump and makes an uproar to be unsatisfactory for default easy prophylactic iedex and the code check
It is required that when being more than or equal to default second code check threshold value, selecting the shift keying modulation mode；Wherein, second code check
Threshold value is less than the first code check threshold value；
When the operating mode is unsatisfactory for default operating mode standard, the pump and makes an uproar to be unsatisfactory for default easy prophylactic iedex and the code check
It is required that when being less than the second code check threshold value, selecting the phase-shift keying (PSK) modulation system or the shift keying modulation mode.
4. underground signal modulator approach as claimed in claim 2, it is characterised in that the phase-shift keying (PSK) modulation system includes：
Zero point phase modulation, wait phase modulation and multicycle phase modulation；
The zero point phase modulation refers to：Change phase at the dead-center position of carrier waveform；
It is described wait phase modulation refer to：The phase modulation time is reserved within each carrier waveform cycle, each carrier waveform cycle includes
Signal section and phase modulation part；
The multicycle phase modulation refers to：Modulated using multicycle signal element in the signal section；Used in the phase modulation part
It is modulated with the waveform of frequency or half frequency with signal element.
5. underground signal modulator approach as claimed in claim 4, it is characterised in that
The implementation of the zero point phase modulation includes：Single sinusoidal waveform complete cycle in carrier wave is changed to differ 180 by phase
The sinusoidal waveform of degree is alternate to be put together；
The implementation for waiting phase modulation includes：Current phase is kept if the phase of the front and rear waveform of carrier wave is identical not
Become, phase modulation is carried out in the phase modulation part of each wave period if the phase of the front and rear waveform of carrier wave is differed；
The implementation of the multicycle phase modulation includes：Adjusted using homogenous frequency signal if the phase of the front and rear waveform of carrier wave is identical
Phase, uses half-frequency signal phase modulation if the phase of the front and rear waveform of carrier wave is differed.
6. underground signal modulator approach as claimed in claim 2, it is characterised in that the shift keying modulation mode includes：
Binary system half period CPFSK modulation systems, binary system complete period CPFSK modulation systems and quaternary CPFSK modulation systems；
The binary system half period CPFSK modulation system refers to：Half period and complete period sinusoidal waveform is respectively adopted as modulation
Signal；
The binary system complete period CPFSK modulation system refers to：The binary system half period is substituted using complete sinusoidal waveform
Half period sine wave in CPFSK modulation systems；
The quaternary CPFSK modulation systems refer to：00,01,10,11 4 are modulated respectively using four kinds of sine waves of different frequency
Individual data.
7. a kind of underground signal modulating device, it is characterised in that the underground signal modulating device includes：Signal acquisition module and
Signal modulation module；
The signal acquisition module, for the measurement signal under production wells in drilling process；
The signal modulation module, for according to drillng operation condition and requiring selecting modulation mode, and according to selected institute
Modulation system is stated to be modulated the underground survey signal；
Wherein, the underground survey signal after modulation is used to control shearing valve type mud pulse generator.
8. underground signal modulating device as claimed in claim 7, it is characterised in that
The drillng operation condition includes：Hole condition and pump are made an uproar；
The drillng operation is required to include：Code check requirement；
The modulation system includes：Amplitude-shift keying modulation system, phase-shift keying (PSK) modulation system and shift keying modulation mode.
9. underground signal modulating device as claimed in claim 8, it is characterised in that the signal modulation module is made according to drilling well
Industry condition and require that selecting modulation mode includes：
Meet default easy prophylactic iedex and the code check requirement when the operating mode meets default operating mode standard, the pump and makes an uproar
During more than or equal to default first code check threshold value, the amplitude-shift keying modulation system is selected；
When the operating mode is unsatisfactory for default operating mode standard, the pump and makes an uproar to be unsatisfactory for default easy prophylactic iedex and the code check
It is required that when being more than or equal to default second code check threshold value, selecting the shift keying modulation mode；Wherein, second code check
Threshold value is less than the first code check threshold value；
When the operating mode is unsatisfactory for default operating mode standard, the pump and makes an uproar to be unsatisfactory for default easy prophylactic iedex and the code check
It is required that when being less than the second code check threshold value, selecting the phase-shift keying (PSK) modulation system or the shift keying modulation mode.
10. underground signal modulating device as claimed in claim 2, it is characterised in that the phase-shift keying (PSK) modulation system includes：
Zero point phase modulation, wait phase modulation and multicycle phase modulation；
The zero point phase modulation refers to：Change phase at the dead-center position of carrier waveform；
It is described wait phase modulation refer to：The phase modulation time is reserved within each carrier waveform cycle, each carrier waveform cycle includes
Signal section and phase modulation part；
The multicycle phase modulation refers to：Modulated using multicycle signal element in the signal section；Used in the phase modulation part
It is modulated with the waveform of frequency or half frequency with signal element；
The shift keying modulation mode includes：Binary system half period CPFSK modulation systems, binary system complete period CPFSK modulation
Mode and quaternary CPFSK modulation systems；
The binary system half period CPFSK modulation system refers to：Half period and complete period sinusoidal waveform is respectively adopted as modulation
Signal；
The binary system complete period CPFSK modulation system refers to：The binary system half period is substituted using complete sinusoidal waveform
Half period sine wave in CPFSK modulation systems；
The quaternary CPFSK modulation systems refer to：00,01,10,11 4 are modulated respectively using four kinds of sine waves of different frequency
Individual data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710069342.2A CN106850477B (en) | 2017-02-08 | 2017-02-08 | A kind of underground signal modulator approach and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710069342.2A CN106850477B (en) | 2017-02-08 | 2017-02-08 | A kind of underground signal modulator approach and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106850477A true CN106850477A (en) | 2017-06-13 |
| CN106850477B CN106850477B (en) | 2019-12-03 |
Family
ID=59122979
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710069342.2A Active CN106850477B (en) | 2017-02-08 | 2017-02-08 | A kind of underground signal modulator approach and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106850477B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110500087A (en) * | 2019-08-28 | 2019-11-26 | 中国石油集团川庆钻探工程有限公司 | Method for transmitting signals based on mud-pulse pressure magnitude |
| CN110570182A (en) * | 2019-08-02 | 2019-12-13 | 苏州日煊数字科技有限公司 | Mobile payment system based on signal waveform propagation characteristics |
| CN110644977A (en) * | 2019-09-16 | 2020-01-03 | 中海艾普油气测试（天津）有限公司 | Control method for receiving and sending underground small signals for testing |
| CN112065374A (en) * | 2020-10-20 | 2020-12-11 | 中国石油集团渤海钻探工程有限公司 | Dynamic optimization design method for measuring mud pressure wave signal period while drilling |
| CN112350804A (en) * | 2021-01-05 | 2021-02-09 | 华中科技大学 | Communication device and method for cased well extremely low frequency channel |
| WO2022126716A1 (en) * | 2020-12-18 | 2022-06-23 | 中国科学院地质与地球物理研究所 | Synchronization method for measure while drilling system |
| CN115865278A (en) * | 2023-02-08 | 2023-03-28 | 中国科学院地质与地球物理研究所 | Carrier distortion compensation method for MWD (measurement while drilling) system |
| CN116156559A (en) * | 2023-01-30 | 2023-05-23 | 中国科学院地质与地球物理研究所 | Data transmission method and system for rotary steering drilling tool |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2003256306A1 (en) * | 2002-06-28 | 2004-01-19 | The Regents Of The University Of California | Remote down-hole well telemetry |
| CN103670380A (en) * | 2013-12-18 | 2014-03-26 | 贝兹维仪器(苏州)有限公司 | Down-hole slurry pulse signal generation device |
| CN106321080A (en) * | 2016-09-13 | 2017-01-11 | 中国石油大学(华东) | Method for processing mud continuous-wave pulse signals while drilling |
-
2017
- 2017-02-08 CN CN201710069342.2A patent/CN106850477B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU2003256306A1 (en) * | 2002-06-28 | 2004-01-19 | The Regents Of The University Of California | Remote down-hole well telemetry |
| CN103670380A (en) * | 2013-12-18 | 2014-03-26 | 贝兹维仪器(苏州)有限公司 | Down-hole slurry pulse signal generation device |
| CN106321080A (en) * | 2016-09-13 | 2017-01-11 | 中国石油大学(华东) | Method for processing mud continuous-wave pulse signals while drilling |
Non-Patent Citations (1)
| Title |
|---|
| 胡俊伟: "高速泥浆脉冲数据传输***调制解调算法研究", 《中国优秀硕士学位论文全文数据库 工程科技I辑》 * |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110570182A (en) * | 2019-08-02 | 2019-12-13 | 苏州日煊数字科技有限公司 | Mobile payment system based on signal waveform propagation characteristics |
| CN110500087A (en) * | 2019-08-28 | 2019-11-26 | 中国石油集团川庆钻探工程有限公司 | Method for transmitting signals based on mud-pulse pressure magnitude |
| CN110644977A (en) * | 2019-09-16 | 2020-01-03 | 中海艾普油气测试（天津）有限公司 | Control method for receiving and sending underground small signals for testing |
| CN112065374A (en) * | 2020-10-20 | 2020-12-11 | 中国石油集团渤海钻探工程有限公司 | Dynamic optimization design method for measuring mud pressure wave signal period while drilling |
| CN112065374B (en) * | 2020-10-20 | 2022-04-12 | 中国石油集团渤海钻探工程有限公司 | Dynamic optimization design method for measuring mud pressure wave signal period while drilling |
| WO2022126716A1 (en) * | 2020-12-18 | 2022-06-23 | 中国科学院地质与地球物理研究所 | Synchronization method for measure while drilling system |
| CN112350804A (en) * | 2021-01-05 | 2021-02-09 | 华中科技大学 | Communication device and method for cased well extremely low frequency channel |
| CN112350804B (en) * | 2021-01-05 | 2021-04-13 | 华中科技大学 | Communication device and method for cased well extremely low frequency channel |
| CN116156559A (en) * | 2023-01-30 | 2023-05-23 | 中国科学院地质与地球物理研究所 | Data transmission method and system for rotary steering drilling tool |
| CN116156559B (en) * | 2023-01-30 | 2023-08-29 | 中国科学院地质与地球物理研究所 | Data transmission method and system for rotary steering drilling tool |
| CN115865278A (en) * | 2023-02-08 | 2023-03-28 | 中国科学院地质与地球物理研究所 | Carrier distortion compensation method for MWD (measurement while drilling) system |
| CN115865278B (en) * | 2023-02-08 | 2023-05-26 | 中国科学院地质与地球物理研究所 | Method for compensating carrier distortion of Measurement While Drilling (MWD) system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106850477B (en) | 2019-12-03 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106850477B (en) | A kind of underground signal modulator approach and device | |
| CN106958442A (en) | A kind of mud-pulse Transmission system and method | |
| US8302685B2 (en) | Mud pulse telemetry data modulation technique | |
| US6847585B2 (en) | Method for acoustic signal transmission in a drill string | |
| CN105863622B (en) | Shear valve mud pulse generator work system and its operating mode | |
| CN202850989U (en) | High speed data transmission system based on single-core logging cable | |
| CN102134991B (en) | High-speed wireless duplex communication method and device for information between mud drilling well and ground | |
| CN106850479B (en) | Drilling fluid continuous wave frequency continuous phase smooth coding modulation and demodulation system and method | |
| US9664815B2 (en) | Telemetry method and system for subsurface well and reservoir and logging data | |
| CN106321080A (en) | Method for processing mud continuous-wave pulse signals while drilling | |
| CN106437686A (en) | Device for quickly transmitting LWD (Logging While Drilling) data through electromagnetic wave signal | |
| CN106089188A (en) | A kind of real-time minimizing technology of mud pulse signal pump noise | |
| CN105401936B (en) | Rotary valve rotating speed controls the reconstructing method of pulse | |
| CN111786927A (en) | Orthogonal frequency division multiplexing while-drilling data transmission method, system, storage medium and application | |
| WO2016134143A1 (en) | Modulation scheme for high speed mud pulse telemetry with reduced power requirements | |
| US9695686B2 (en) | Mud pulse telemetry devices, systems, and methods | |
| CN104320235A (en) | Broadband data transmission system and method for drilling fluid channel | |
| Jianhui et al. | An effective approach for the noise removal of mud pulse telemetry system | |
| CN104992549A (en) | Intelligent drill string duplex information transmission system on basis of ADSL (Asymmetrical Digital Subscriber Loop) communication and method | |
| CN102031957A (en) | Rotating guiding well drilling signal receiving device based on underground mud turbine motor | |
| CN104088628B (en) | Continuous phase position and phase shift keying modulation method based on four-blade triangular valve type | |
| CN114483014A (en) | Modulation system and method for underground pressure wave signal | |
| CN113622899A (en) | Drilling fluid continuous wave signal modulation system and method | |
| CN203248147U (en) | Both-way communication system with measurement while drilling | |
| CN112761625B (en) | Synchronization method of measurement while drilling system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Applicant after: China Offshore Oil Group Co., Ltd. Applicant after: China Oilfield Services Limited Address before: 100010 Chaoyangmen North Street, Dongcheng District, Dongcheng District, Beijing Applicant before: China National Offshore Oil Corporation Applicant before: China Oilfield Services Limited |
|
| CB02 | Change of applicant information | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |