CN206299373U - The nearly drill bit wireless short pass device of invariable power - Google Patents
The nearly drill bit wireless short pass device of invariable power Download PDFInfo
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- CN206299373U CN206299373U CN201621035755.6U CN201621035755U CN206299373U CN 206299373 U CN206299373 U CN 206299373U CN 201621035755 U CN201621035755 U CN 201621035755U CN 206299373 U CN206299373 U CN 206299373U
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Abstract
The utility model provides the nearly wireless short pass device of drill bit invariable power, described device includes emission part and acceptance division, the emission part is connected with drill bit measurement pipe nipple, the acceptance division is connected in measurement-while-drilling system, the emission part is by short pass after the Measurement and Data Processing of drill bit measurement pipe nipple to the acceptance division, information is further processed the acceptance division transmission to the measurement-while-drilling system, the structure middle part of the emission part is inserted with an insulating short section, and the emitting portion is cut into the insulating short section transmitting positive pole and transmitting negative pole of electric insulation；The structure middle part of the acceptance division is inserted with an insulating short section, and the receiving portion is cut into the reception positive pole of electric insulation and receives negative pole by the insulating short section；Transmission signal is injected stratum by transmitting positive pole, and the transmission signal is received through stratum by reception positive pole, and constitutes loop by receiving negative pole and transmitting negative pole, realizes wireless short pass.
Description
Technical field
The utility model principally falls into drilling measuring field, and in particular to the nearly drill bit wireless short pass device of invariable power.
Background technology
At this stage, nearly drill bit logging while drilling technology development is very fast, compares with conventional well logging, nearly drill bit logger
Sensor probe apart from drill bit closer to, more can in time obtain brill and open formation information, more accurate sign wellbore trace reduces drilling well and makees
Industry risk, improves operating efficiency.In general, nearly drill bit connector for logging while drilling is made up of following three part：Nearly drill bit measurement is short
Section, nearly drill bit short distance transmitting device and measurement-while-drilling system（MWD）.Wherein near drill bit measurement pipe nipple is arranged near drill bit, interior
Portion is provided with accelerometer, Magnetic Sensor etc., for measuring the trace information of drilling.Some systems can also install gamma-ray probe and
Resistivity measurement pipe nipple, turns up the soil a layer geological information for measurement brill in time.Nearly drill bit short distance transmitting device is by emitter and connects
Acceptor is constituted, mid-span screw rod.Realize the information transmission of nearly drill bit measurement pipe nipple to the function of measurement-while-drilling system MWD.
Due to the design feature of screw rod, generally it does not have electrical connection properties（Transmitting and reception can not be realized using through line
The wire communication of device）, unless transformation screw-rod structure, wire communication is realized using being embedded in screw rod through line.But it is this
Structure has the limitation that it is used, and is abandoned substantially.The developing direction of nearly drill bit short pass is wireless transmission method.CNPC surveys
Visit developmental research drilling technology research institute of institute and realize that its method is to be loaded with the wireless electromagnetic short pass of transmitting antenna using electromagnetic mode
Be modulated for the data that described nearly drill bit measurement pipe nipple is collected by signal generator, generates electromagnetic signal, and by the electromagnetism
Signal transmitting output, the wireless electromagnetic short pass receiver for being loaded with reception antenna receives the electromagnetic signal for being launched output, and docks
The electromagnetic signal for receiving is demodulated, and the data after demodulation are transmitted into MWD measuring systems.Part III measurement-while-drilling system MWD
Mainly it is made up of inserting tube, battery and mud pulse generator.Nearly drill bit short distance transmitting device will be occurred by means of mud-pulse
The nearly drill bit metrical information that device will be received is sent to ground system, for the monitor in real time of field engineer.
Realize that the wired short-distance transmission of nearly drill bit has its very big defect by way of transforming screw rod.Screw rod is in directional well
It is very big with usage amount in horizontal operation, while species is a lot, different hole condition, hole diameter, ground environment and build angle rate, the spiral shell for using
Bar also can be different.Screw rod manufacturer is also a lot, transforms screw rod, will pass through line and is embedded in helicoid hydraulic motor, promotes this technology
To there is very big difficulty, the application prospect very little of future market.
Being wirelessly transferred for bridging screw rod is realized using the short pass of electromagnetic mode substantially.It uses transmitting coil and receives line
Circle, the transmission of signal is realized using faraday electromagnetic induction principle.But this implementation also has shortcoming, and induced signal is in difference
Ground resistance environment under, it is different to receive energy, on low-resistance stratum, realizes difficult, while mechanical processing difficulty is larger, scene application is not
It is convenient, it is relatively costly.In addition, wireless electromagnetic short pass mode, it is necessary to housing install two coils, as transmitting and receive, line
Circle is completely insulated with housing, and general mode is made as loop coil, due to using faraday electromagnetic induction principle, its
Shortcoming is also apparent from, and processes and install excessively complicated, and the contact area with stratum and mud is small, it is impossible to by the big face of transmission signal
Product injects stratum, to ensure the amplitude requirement of reception signal, can only simply improve transmission power, causes emission effciency low.Together
When snr of received signal it is also poor.
Utility model content
Regarding to the issue above, this purpose is to provide a kind of device of the wireless invariable power short-distance transmission of nearly drill bit, realize with
The uni-directional wireless data transfer across the nearly drill bit measurement pipe nipple of screw rod to measurement-while-drilling system MWD during brill, simple structure, just
In marketing and application.
The utility model is achieved through the following technical solutions：
The nearly drill bit wireless short pass device of invariable power, described device includes emission part and acceptance division, and the emission part is by signal
To the acceptance division, the emitting portion is transmitting positive pole and transmitting negative pole, and the receiving portion is to connect for wireless short pass after treatment
Receive positive pole and receive negative pole；Transmission signal is injected stratum by transmitting positive pole, and the transmission signal is received through stratum by reception positive pole,
And loop is constituted by receiving negative pole and transmitting negative pole, realize wireless short pass.
Further, the structure middle part of the emission part is inserted with an insulating short section and realizes the emitting portion to launch just
Pole and transmitting negative pole；
The structure middle part of the acceptance division is inserted with an insulating short section and realizes the receiving portion to receive positive pole and reception
Negative pole.
Further, the emission part includes a power limitation control portion, described in power limitation control portion real-time monitoring
The electric current and voltage of the transmission signal of emission part, and electric current and voltage to the transmission signal carries out true rms measurement, will
Effective value feedback is to emission part and then the power invariability of the control transmission signal.
Further, the emission part includes transmited processor and transmitting drive division, the transmitting drive division and the hair
Positive pole and the transmitting negative couplings are penetrated, the transmited processor is connected with the transmitting drive division in the presence of two kinds, and one is described
Transmited processor is joined directly together with the transmitting drive division, and another connected between the transmited processor and the transmitting drive division
The measurement data of the measurement pipe nipple is carried out binary phase keying modulation and obtained by persevering power control section, the transmited processor
Modulated signal；The transmitting drive division, the modulated signal is amplified, and is launched after power drive；The power limitation control portion will
True rms measurement feeds back to the transmited processor, and transmited processor is by after calculating, adjusting transmission signal amplitude, it is ensured that hair
Penetrate signal power constant.
Further, the acceptance division includes receiving transformer, receives signal imitation processor and receiving processor；It is described
Receiving transformer and the reception positive pole and reception negative couplings, the receiving transformer and the reception signal imitation processor
It is connected, the reception signal imitation processor is connected with the receiving processor, and the receiving transformer is realized receiving signal
Differential Input, reduces power frequency 50Hz interference；The reception signal imitation processing unit, realizes receiving the filter and amplification of signal；It is described
Receiving processor portion, realizes sampling, digital filtering, automatic growth control and 485 communications with mwd system of signal；It is described to connect
Receiving processor includes RS485 communication interfaces.
The nearly drill bit wireless short pass method of invariable power, method is comprised the following steps：
（1）Erecting device：Emission part is connected with drill bit measurement pipe nipple, and the receiving portion is connected in measurement-while-drilling system, hair
Penetrate portion and acceptance division is separately mounted to screw rod two ends；
（2）Measurement While Drilling Data is launched：In drill bit rotation process, the data of drill bit measurement pipe nipple measurement reach transmitting treatment
Device；Transmited processor carries out binary phase keying modulation and reaches transmitting drive division to the metrical information for measuring pipe nipple；Transmitting is driven
Stratum is injected after modulated signal amplifying power is driven in dynamic portion；
（3）Measurement While Drilling Data is received：The signal at acceptance division the two poles of the earth is coupled into reception simulation by receiving transformer
Signal processor, by carrying out digital sample after small-signal differential amplification and multistage amplification filtering process, by receiving processor
Digital filtering and coherent demodulation obtain original transmitted information.
Further, by power limitation control portion transmission signal power invariability in the Measurement While Drilling Data step of transmitting；It is permanent
Power control section real-time monitoring emission current and voltage carry out true rms measurement, and transmited processor is by after calculating, regulation is sent out
Penetrate signal amplitude, it is ensured that inject formation signal power invariability.
Advantageous Effects of the present utility model：
（1）The utility model can realize that nearly drill bit measurement pipe nipple is communicated with the uni-directional wireless of measurement-while-drilling system MWD, and
By the real effective of measurement emission current and voltage in real time, power limitation control is realized, in the stratum of different resistivity and mud
Under environment, under the control of invariable power algorithm, transmission speed more than 30 bits per seconds under 10 meters of screw conditions of bridging is capable of achieving
Rate.The processing of device and execute-in-place are easier simultaneously, and maintenance cost is lower.
（2）The utility model uses insertion insulator structure, using whole housing as transmitting and the mode of receiving electrode, can
To ensure that transmitting and receiving electrode are fully contacted with mud and stratum, and contact area is very big.Only need to provide certain work(
Rate, you can signal is injected into stratum, while the area of receiving body is very big, can be fully contacted stratum and mud, the amplitude of signal
Improved a lot with signal to noise ratio.
Brief description of the drawings
Fig. 1, device scheme of installation of the present utility model；
Fig. 2, emission part structure chart of the present utility model；
Fig. 3, acceptance division structure chart of the present utility model.
Specific embodiment
In order that the purpose of this utility model, technical scheme and advantage become more apparent, below in conjunction with accompanying drawing and implementation
Example, is explained in further detail to the utility model.It should be appreciated that specific embodiment described herein is used only for explaining
The utility model, is not used to limit the utility model.
Conversely, the utility model cover it is any be defined by the claims do in spirit and scope of the present utility model
Replacement, modification, equivalent method and scheme.Further, it is right below in order that the public has a better understanding to the utility model
It is detailed to describe some specific detail sections in detailed description of the present utility model.Do not have for a person skilled in the art
The description of these detail sections can also completely understand the utility model.
Embodiment 1
As shown in figure 1, the nearly drill bit wireless short pass device of invariable power, described device includes emission part and acceptance division, the hair
Penetrate portion to be connected with drill bit measurement pipe nipple, the receiving portion is connected in measurement-while-drilling system, and the emission part measures the drill bit
To the acceptance division, information is further processed transmission to described with brill for the acceptance division for short pass after the Measurement and Data Processing of pipe nipple
Measuring system.The structure middle part of the emission part is inserted with an insulating short section, and respectively be cut into the emission part by the insulating short section
The transmitting positive pole and transmitting negative pole of electric insulation；
The structure middle part of the acceptance division is inserted with an insulating short section respectively, and the insulating short section cuts the acceptance division respectively
Into the reception positive pole and reception negative pole of electric insulation；
By launching positive pole, launching negative pole, receive positive pole and receive negative pole and realize wireless short pass.
The emission part includes power limitation control portion, and the electric current and voltage of transmission signal described in real-time monitoring are really had
Valid value is measured, and is fed back emission part and then controlled the signal power of the emission part transmitting constant.
As shown in Fig. 2 the emission part includes transmited processor and transmitting drive division, the transmitting drive division and the hair
Positive pole and the transmitting negative couplings are penetrated, the transmited processor is connected with the transmitting drive division in the presence of two kinds, and one is described
Transmited processor is joined directly together with the transmitting drive division, and another connected between the transmited processor and the transmitting drive division
The measurement data of the measurement pipe nipple is carried out binary phase keying modulation and obtained by persevering power control section, the transmited processor
Modulated signal；The transmitting drive division, the modulated signal is amplified, and is launched after power drive；The power limitation control portion will
True rms measurement feeds back to the transmited processor, and transmited processor is by after calculating, adjusting transmission signal amplitude, it is ensured that hair
Penetrate signal power constant.
As shown in figure 3, the acceptance division includes receiving transformer, receives signal imitation processor and receiving processor；Institute
Receiving transformer and the reception positive pole and reception negative couplings are stated, the receiving transformer and the reception signal imitation are processed
Device is connected, and the reception signal imitation processor is connected with the receiving processor, and the receiving transformer is realized receiving signal
Differential Input, reduce power frequency 50Hz interference；The reception signal imitation processing unit, realizes receiving the filter and amplification of signal；Institute
Receiving processor portion is stated, sampling, digital filtering, automatic growth control and 485 communications with mwd system of signal are realized.
The nearly drill bit wireless short pass method of invariable power, using upper device, method is comprised the following steps：
（1）Erecting device：Emission part is connected with drill bit measurement pipe nipple, and the receiving portion is connected in measurement-while-drilling system, hair
Penetrate portion and acceptance division is separately mounted to screw rod two ends；
（2）Measurement While Drilling Data is launched：In drill bit rotation process, the data of drill bit measurement pipe nipple measurement reach transmitting treatment
Device；Transmited processor carries out binary phase keying modulation and reaches transmitting drive division to the metrical information for measuring pipe nipple；Transmitting is driven
Stratum is injected after modulated signal amplifying power is driven in dynamic portion；
（3）Measurement While Drilling Data is received：The signal at acceptance division the two poles of the earth is coupled into reception simulation by receiving transformer
Signal processor, by carrying out digital sample after small-signal differential amplification and multistage amplification filtering process, by receiving processor
Digital filtering and coherent demodulation obtain original transmitted information.
By power limitation control portion transmission signal power invariability in the Measurement While Drilling Data step of transmitting；Power limitation control portion
Real-time monitoring emission current and voltage carry out true rms measurement, transmited processor by after calculating, adjusting transmission signal amplitude,
Formation signal power invariability is injected in guarantee.
The RMS conversion of emitting voltage and electric current is realized using true rms measurement chip AD536A；
Constant 1 watt of transmission power；
Receive signal imitation processing unit and realize that the filter and amplification for receiving signal is realized by amplifying filtering step by step, modulation letter
Number it is binary phase keying modulation, reference carrier frequency is 5HZ to 10Khz, and receiving terminal primary signal amplitude is being received volt level, needed
It can just be extracted from noise by 3-4 grades of amplification bandpass filtering network.
Claims (4)
1. the wireless short pass device of nearly drill bit invariable power, described device includes emission part and acceptance division, and the emission part is by signal
Wireless short pass is to the acceptance division after reason, it is characterised in that the emitting portion is transmitting positive pole and transmitting negative pole, the reception
Part is for reception positive pole and receives negative pole.
2. the nearly drill bit wireless short pass device of invariable power as claimed in claim 1, it is characterised in that the structure middle part of the emission part
An insulating short section is inserted with, the structure middle part of the acceptance division is inserted with an insulating short section.
3. the nearly drill bit wireless short pass device of invariable power as claimed in claim 1, it is characterised in that the emission part including transmitting at
Reason device, transmitting drive division and a power limitation control portion, the transmitting drive division and transmitting positive pole and the transmitting negative pole
Coupling, the transmited processor is connected with the transmitting drive division in the presence of two kinds, and one is the transmited processor and the transmitting
Drive division is joined directly together, and another is to be connected with power limitation control portion between the transmited processor and the transmitting drive division.
4. the nearly drill bit wireless short pass device of invariable power as claimed in claim 1, it is characterised in that the acceptance division includes receiving and becomes
Depressor, reception signal imitation processor and receiving processor；
The receiving transformer and the reception positive pole and reception negative couplings, the receiving transformer and described reception are believed
Number analog processor is connected, and the reception signal imitation processor is connected with the receiving processor；
The receiving processor includes RS485 communication interfaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621035755.6U CN206299373U (en) | 2016-08-31 | 2016-08-31 | The nearly drill bit wireless short pass device of invariable power |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621035755.6U CN206299373U (en) | 2016-08-31 | 2016-08-31 | The nearly drill bit wireless short pass device of invariable power |
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| Publication Number | Publication Date |
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| CN206299373U true CN206299373U (en) | 2017-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201621035755.6U Active CN206299373U (en) | 2016-08-31 | 2016-08-31 | The nearly drill bit wireless short pass device of invariable power |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630253A (en) * | 2019-09-18 | 2019-12-31 | 中国科学院地质与地球物理研究所 | Near-bit wireless short-transmission constant current transmitting method and device |
-
2016
- 2016-08-31 CN CN201621035755.6U patent/CN206299373U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110630253A (en) * | 2019-09-18 | 2019-12-31 | 中国科学院地质与地球物理研究所 | Near-bit wireless short-transmission constant current transmitting method and device |
| US10975689B1 (en) | 2019-09-18 | 2021-04-13 | Institute Of Geology And Geophysics, Chinese Academy Of Sciences | Near bit wireless constant current short distance transmission method and device |
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