CN105812067A - Oil-well wireless communication system and wireless communication method based on sound wave - Google Patents
Oil-well wireless communication system and wireless communication method based on sound wave Download PDFInfo
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- CN105812067A CN105812067A CN201610252214.7A CN201610252214A CN105812067A CN 105812067 A CN105812067 A CN 105812067A CN 201610252214 A CN201610252214 A CN 201610252214A CN 105812067 A CN105812067 A CN 105812067A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B11/00—Transmission systems employing sonic, ultrasonic or infrasonic waves
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B13/00—Transmission systems characterised by the medium used for transmission, not provided for in groups H04B3/00 - H04B11/00
- H04B13/02—Transmission systems in which the medium consists of the earth or a large mass of water thereon, e.g. earth telegraphy
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Abstract
The invention discloses an oil-well wireless communication system and a wireless communication method based on sound wave. The system comprises a ground audio sound wave control system and an underground oil-well sound wave receiving device, wherein a standard sound source generates an all-digital sound wave signal; after amplified by a power amplifier, the all-digital sound wave signal is fed into two electroacoustic devices to generate two signals; after the signals are combined, the all-digital sound wave signal subjected to narrow-band digital modulation is sent underground; and the all-digital sound wave signal sent by a wellhead is converted to an electric signal through a deep water resonant cavity microphone, is sent to an underground decoding circuit to decode and is conveyed to an underground motor or an underground switch. By utilizing the advanced sound wave communication technology, long-distance all-digital sound wave signal transmission is carried out in space structures in an oil-well, such as full three links, annuluses and sleeves, so that the layer mining of a pay bed can be realized, and thus the production efficiency is greatly improved.
Description
Technical field
The invention discloses a kind of oil well wireless communication system based on sound wave and wireless communications method, native system includes ground audio frequency sound control, down-hole decoding circuit and signal coding system.
Background technology
In the information of oil well is transmitted, restriction due to other conditions of oil well, make oil well communication inevitably in the face of a lot of difficulties, as: transmission range is long, in delivering path, transversary change is many, tube wall greasy dirt, the oil actual nonconforming hole condition condition such as medicated cap, wax deposition, the environment etc. of a down-hole high position, high pressure and humidity.
By contrasting each signal transmission form, verifying through sufficient experimental data, sound wave is that the carrier wave being suitable for the most selects.Owing to there is substantial amounts of mineral ion in the oil mixing with water liquid in oil well, its electrical conductivity is higher, causes propagating and has very big decay in electromagnetic wave therein.In contrast, air, constitute oil pipe, the steel construction of sleeve pipe, liquid are all the good carrier of sound wave.Especially sound wave has the significantly high velocity of sound in solid and liquid, and sonic sensor (transducer) has best sensitivity in a liquid in addition, and therefore from the physical acoustics character of oil well, sound wave is to be preferably selected.
Summary of the invention
The invention discloses a kind of oil well wireless communication system based on sound wave and wireless communications method, native system includes ground audio frequency sound control, the micro-sound device of down-hole deep water resonator cavity, down-hole decoding circuit and signal coding system.Ground audio frequency sound controls by sound wave carries out narrow-band digital carrier modulation, utilizes advanced acoustic communication technology, the full three links in oil well, annular space, the space structure such as sleeve pipe carries out the transmission of remote digital acoustic signals；The micro-sound device of deep water resonator cavity of down-hole will receive digital sound wave signal, be converted to the signal of telecommunication and pass to down-hole decoding circuit；Down-hole decoding circuit opens and closes downhole electrical motor by signal decoding, it is achieved the separate zone production of oil-producing formation, thus being greatly improved production efficiency.
The technical solution used in the present invention is:
One, a kind of oil well wireless communication system based on sound wave:
Control system including ground audio frequency sound and be placed in the oil well acoustic receiver device of down-hole, ground audio frequency sound controls system and includes standard source, dual pathways power amplifier, the first electro-acoustic element, the second electro-acoustic element and sound wave conjunction road coupled conductor, and oil well acoustic receiver device includes the micro-sound device of deep water resonator cavity and down-hole decoding circuit；Standard source is connected with the first electro-acoustic element and the second electro-acoustic element respectively through dual pathways power amplifier, and the first electro-acoustic element and the second electro-acoustic element are connected to sound wave and close road coupled conductor output sound wave；Sound wave is received by the micro-sound device of deep water resonator cavity, and the micro-sound device of deep water resonator cavity and down-hole decoding circuit connect.
The present invention controls system by ground audio frequency sound and produces digital acoustic signals, it is achieved for the control of downhole system.
Standard source produces the audio signal of characteristic frequency, feed-in electro-acoustic element after power amplifier amplifies, and produces the audio control signal of corresponding frequencies and the carrier signal of characteristic frequency；Acoustic signals is modulated via narrow-band digital, and down-hole is sent digital acoustic signals.
Deep water resonator cavity micro-sound device receives the digital acoustic signals sent from well head, by air resonance in resonator cavity, acoustic signals is converted into the signal of telecommunication, is sent to down-hole decoding circuit and is decoded.
Down-hole decoding circuit includes analog signal processing part, digital control part, and motor-drive circuit.Analog signal processing part is responsible for amplifying the audio signal that the micro-sound device of deep water resonator cavity receives, and it is carried out rectification and integration operation；The decoding of digital control part charge control circuit and motor control；Motor-drive circuit according to control signal control motor rotate forward, the opening and closing of reversion and dormancy and down-hole switch.
The micro-sound device of described deep water resonator cavity is vertically placed and is placed in deep underwater pipes, pressure medium sound wave resonance cavity including inner hollow, pressure medium sound wave resonance cavity has air cavity and the microphone of accommodating gas, air cavity lower end and microphone, and microphone is connected with down-hole decoding circuit.
The length of described air cavity is λ/2 wavelength, and λ represents the wave length of sound of transmission.
Described standard source produces an audio control signal respectively and a carrier signal is fed in the first electro-acoustic element and the second electro-acoustic element.
Described dual pathways power amplifier has two independent channels and processes two signals that standard source sends over respectively.
Described down-hole decoding circuit includes the frontend amplifying circuit, integration rectification circuit, signal conditioning circuit and the drive circuit that are sequentially connected with, the reception signal of the micro-sound device of deep water resonator cavity amplifies through frontend amplifying circuit successively, integration rectifier circuit rectifies is sent to signal conditioning circuit and is demodulated processing after processing, signal conditioning circuit sends control signals to drive circuit, and then controls downhole electrical motor.
nullDescribed frontend amplifying circuit includes chip U1、Amplifier U2A and amplifier U2B，It is in series with resistance R6 between 2 and 3 feet of chip U1，It is parallel between 1 and 4 feet of chip U1 with plug J5 after resistance R5 and resistance R9 series connection，It is parallel with electric capacity C6 and electric capacity C7 between 5 and 6 feet of chip U1，It is connected to after electric capacity C1 and electric capacity C2 parallel connection between 8 feet and the ground of chip U1，7 feet of chip U1 are connected to the positive input of amplifier U2A respectively through electric capacity C41 and electric capacity C4，The positive input of amplifier U2A is through resistance R10 ground connection，The reverse input end of amplifier U2A is respectively through resistance R1、Ground connection and the outfan of self after resistance R2，The outfan of amplifier U2A connects the positive input of amplifier U2B through electric capacity C5，The positive input of amplifier U2B is through resistance R7 ground connection，The reverse input end of amplifier U2B is respectively through resistance R3、Ground connection and the outfan of self after resistance R4，Amplifier U2B outfan exports the outfan as frontend amplifying circuit after electric capacity C10，Plug J5 is connected to microphone 11 as the input of frontend amplifying circuit.
nullDescribed integration rectification circuit includes amplifier U2C、Amplifier U2D and chip U3，Amplifier U2C and the equal ground connection of amplifier U2D positive input，Amplifier U2C reverse input end is successively through resistance R15、The reverse input end of amplifier U2D it is connected to after resistance R11，Amplifier U2C outfan is connected to reverse input end after diode D1，Respectively through resistance R12 after amplifier U2C outfan connection diode D2、Resistance R16 is connected to amplifier U2C reverse input end and amplifier U2D reverse input end，Electric capacity C9 and resistance R14 it is parallel with between reverse input end and the outfan of amplifier U2D self，The reverse input end of amplifier U2D is connected to 6 feet of chip U3，Amplifier U2D outfan is connected to 5 feet of chip U3 through resistance R13，Amplifier U2D outfan is through diode D3、Ground connection after resistance R18，Amplifier U2D outfan exports the signal output part as integration rectification circuit through resistance R17，Resistance R15、The signal input part as integration rectification circuit is drawn between resistance R11.
Two, a kind of oil well wireless communications method based on sound wave:
Adopt described system, standard source produces digital acoustic signals, after dual pathways power amplifier amplifies, it is separately sent to the first electro-acoustic element and the second electro-acoustic element produces two acoustic signals, two acoustic signals close road coupled conductor through sound wave and close output under road direction deep water, audio frequency sound signal is carried out under the frequency of carrier signal narrow-band digital modulation and closes feed-in down-hole after road, by deep water resonator cavity micro-sound device, acoustic signals is converted into the signal of telecommunication, it is sent to down-hole decoding circuit to be decoded, it is further conveyed to downhole electrical motor, and then control the rotating forward of motor, reversion and stopping.
The audio frequency sound narrow-band digital modulator approach that the present invention adopts, makes full use of the bandpass acoustic characteristic of annular space, it is possible to realize the distance under down hole problem, reliable acoustic communication.
Described standard source produces an audio control signal and a carrier signal is fed in the first electro-acoustic element and the second electro-acoustic element.
The degree of depth adjustment according to deep water of the frequency of described carrier signal.
In the down-hole decoding circuit of the present invention, analog signal processing is responsible for amplifying the audio signal that the micro-sound device of deep water resonator cavity receives, and it is carried out rectification；Digital control part is responsible for decoding and motor controls；Motor-drive circuit according to control signal control motor rotate forward, reversion, the opening and closing of down-hole switch.Thus, down-hole decoding circuit, by receiving the acoustic signals that well head sends, obtains control signal by decoding, and controls the rotation direction of downhole electrical motor, completes opening and closed procedure of down-hole switch.
The invention have the benefit that
The present invention utilizes digital acoustic signals as communication media, modulates on acoustic signals by narrow-band digital carrier modulation by control signal, carries out the transmission of remote digital acoustic signals in the space structure such as full three links in oil well, annular space, sleeve pipe.Oil well acoustic receiver device can apart from 1000 to 3000 meters of depths of well head, even deeper.
Micro-sound device of the present invention adopts single rigid structure material to make, down-hole high temperature, high pressure, moist environment can be born, and internal normal pressure and operating on low voltage can be realized, make it can be maintained in down-hole in the sensitivity of ground survey, and enormously simplify the connection of back-end circuit.
The down-hole decoding circuit of the present invention opens and closes downhole electrical motor by signal decoding, it is achieved the separate zone production of oil-producing formation, thus being greatly improved production efficiency.
Accompanying drawing explanation
Accompanying drawing 1 is the schematic diagram of present system.
Accompanying drawing 2 is the micro-sound device structural representation of down-hole deep water resonator cavity.
Accompanying drawing 3 is the schematic diagram that metal sound wave of the present invention closes road coupled conductor.
Accompanying drawing 4 is down-hole decoding circuit schematic diagram.
Accompanying drawing 5 is frontend amplifying circuit.
Accompanying drawing 6 is integration rectification circuit.
In figure: 1, standard source, 2, dual pathways power amplifier, the 3, first electro-acoustic element, 4, the second electro-acoustic element, 5, sound wave close road coupled conductor, 6, the micro-sound device of deep water resonator cavity, 7, down-hole decoding circuit, 8, motor, 9, sound wave resonance cavity, 10, air cavity, 11, microphone, 12, deep underwater pipes, 13, the water in pipeline, 14, frontend amplifying circuit, 15, integration rectification circuit, 16, signal conditioning circuit, 17, drive circuit.
Detailed description of the invention
Below in conjunction with accompanying drawing 1, the invention will be further described.
As shown in Figure 1, the present invention includes ground audio frequency sound and controls system and be placed in the oil well acoustic receiver device of down-hole, ground audio frequency sound controls system and includes standard source 1, dual pathways power amplifier the 2, first electro-acoustic element the 3, second electro-acoustic element 4 and sound wave conjunction road coupled conductor 5, and oil well acoustic receiver device includes the micro-sound device 6 of deep water resonator cavity and down-hole decoding circuit 7；Standard source 1 is connected with the first electro-acoustic element 3 and the second electro-acoustic element 4 respectively through dual pathways power amplifier 2, and the first electro-acoustic element 3 and the second electro-acoustic element 4 are connected to sound wave conjunction road coupled conductor 5 and export sound wave；Sound wave is received by the micro-sound device 6 of deep water resonator cavity, and the micro-sound device 6 of deep water resonator cavity and down-hole decoding circuit 7 connect.
Standard source 1 produces digital acoustic signals, after power amplifier amplifies, two electro-acoustic elements of feed-in produce two signals, behind Zai He road, down-hole is sent out through the modulated digital acoustic signals of narrow-band digital, acoustic signals is converted into the signal of telecommunication by the micro-sound device 6 of deep water resonator cavity by the digital acoustic signals that well head sends, it is sent to down-hole decoding circuit to be decoded, is further conveyed to downhole electrical motor 8 or down-hole switch.
As shown in Figure 2, the micro-sound device 6 of deep water resonator cavity is vertically placed in deep underwater pipes 12, pressure medium sound wave resonance cavity 9 including inner hollow, pressure medium sound wave resonance cavity 9 has air cavity 10 and the microphone 11 of accommodating gas, air cavity 10 upper end and microphone 11, microphone 11 is connected with down-hole decoding circuit.
Standard source 1 produces an audio control signal respectively and a carrier signal is fed in the first electro-acoustic element 3 and the second electro-acoustic element 4, and therefore dual pathways power amplifier 2 has two independent channels and processes two signals that standard source 1 sends over respectively.
Down-hole decoding circuit includes the frontend amplifying circuit 14, integration rectification circuit 15, signal conditioning circuit 16 and the drive circuit 17 that are sequentially connected with, the reception signal of the micro-sound device 6 of deep water resonator cavity amplifies through frontend amplifying circuit 14 successively, integration rectification circuit 15 rectification is sent to signal conditioning circuit 16 and is demodulated processing after processing, signal conditioning circuit 16 sends control signals to drive circuit 17, and then controls downhole electrical motor 8.
nullAs shown in Figure 5，Frontend amplifying circuit includes chip U1、Amplifier U2A and amplifier U2B，Chip U1 adopts the AD8226 of ADI company，It is in series with resistance R6 between 2 and 3 feet of chip U1，It is parallel between 1 and 4 feet of chip U1 with plug J5 after resistance R5 and resistance R9 series connection，It is parallel with electric capacity C6 and electric capacity C7 between 5 and 6 feet of chip U1，It is connected to after electric capacity C1 and electric capacity C2 parallel connection between 8 feet and the ground of chip U1，7 feet of chip U1 are connected to the positive input of amplifier U2A respectively through electric capacity C41 and electric capacity C4，The positive input of amplifier U2A is through resistance R10 ground connection，The reverse input end of amplifier U2A is respectively through resistance R1、Ground connection and the outfan of self after resistance R2，The outfan of amplifier U2A connects the positive input of amplifier U2B through electric capacity C5，The positive input of amplifier U2B is through resistance R7 ground connection，The reverse input end of amplifier U2B is respectively through resistance R3、Ground connection and the outfan of self after resistance R4，Amplifier U2B outfan exports the outfan as frontend amplifying circuit after electric capacity C10，Plug J5 is connected to microphone 11 as the input of frontend amplifying circuit.
nullAs shown in Figure 6，Integration rectification circuit includes amplifier U2C、Amplifier U2D and chip U3，Chip U3 adopts the ADG849 of ADI company，Amplifier U2C and the equal ground connection of amplifier U2D positive input，Amplifier U2C reverse input end is successively through resistance R15、The reverse input end of amplifier U2D it is connected to after resistance R11，Amplifier U2C outfan is connected to reverse input end after diode D1，Respectively through resistance R12 after amplifier U2C outfan connection diode D2、Resistance R16 is connected to amplifier U2C reverse input end and amplifier U2D reverse input end，Electric capacity C9 and resistance R14 it is parallel with between reverse input end and the outfan of amplifier U2D self，The reverse input end of amplifier U2D is connected to 6 feet of chip U3，Amplifier U2D outfan is connected to 5 feet of chip U3 through resistance R13，Amplifier U2D outfan is through diode D3、Ground connection after resistance R18，Amplifier U2D outfan exports the signal output part as integration rectification circuit through resistance R17，Resistance R15、The signal input part as integration rectification circuit is drawn between resistance R11.
The concrete emulation embodiment of the present invention and implementation process are as follows:
Wherein, standard source 1 selects Agilent33210A function signal generator, dual pathways power amplifier 2 selects dual pathways D-type power amplifier, electro-acoustic element 3,4 selects Changzhou Kate to carry out the high-power sound larynx of electronics corporation, sound wave closes road coupled conductor 5 and selects metal combiner, and the micro-sound device 6 of deep water resonator cavity selects full steel structure deep-well transducer.
The present invention implements as follows in the experiment of 1700 Miyou wells: by well-flushing, is hindered by downhole oil medicated cap etc. and cleans out, then by row test in micro-for deep water resonator cavity sound device 6 and 7 times to 1700 meters water entered 13 of down-hole decoding circuit.Standard source 1 produces digital acoustic signals (carrier signal of the audio control signal of a 42Hz frequency and a 1400Hz frequency), after dual pathways power amplifier 2 amplifies, it is separately sent to the first electro-acoustic element 3 and the second electro-acoustic element 4 produces the audio control signal of a 42Hz frequency and the carrier signal of a 1400Hz frequency, two acoustic signals close road coupled conductor 5 through sound wave and close road output under the narrow-band digital backward deep water of modulation, as shown in Figure 3, by deep water resonator cavity micro-sound device 6, acoustic signals is converted into the signal of telecommunication, it is sent to down-hole decoding circuit 7 to be decoded, it is further conveyed to downhole electrical motor 8, and then control the rotating forward of motor 8, reversion and stopping, and the opening and closing of down-hole switch.
Thus, the present invention utilizes digital acoustic signals as communication media, the signal transmission of the space structure medium and long distances such as the full three links in oil well, annular space, sleeve pipe can be realized, can be deeper apart from 3000 meters of well head, the separate zone production of oil-producing formation can be realized, thus being greatly improved production efficiency, obvious technical effects highlights.
Claims (10)
1. the oil well wireless communication system based on sound wave, it is characterized in that: include ground audio frequency sound and control system and be placed in the oil well acoustic receiver device of down-hole, ground audio frequency sound controls system and includes standard source (1), dual pathways power amplifier (2), the first electro-acoustic element (3), the second electro-acoustic element (4) and sound wave conjunction road coupled conductor (5), and oil well acoustic receiver device includes the micro-sound device (6) of deep water resonator cavity and down-hole decoding circuit (7)；Standard source (1) is connected with the first electro-acoustic element (3) and the second electro-acoustic element (4) respectively through dual pathways power amplifier (2), and the first electro-acoustic element (3) and the second electro-acoustic element (4) are connected to sound wave and close road coupled conductor (5) output sound wave；Sound wave is received by the micro-sound device (6) of deep water resonator cavity, and the micro-sound device (6) of deep water resonator cavity and down-hole decoding circuit (7) connect.
2. a kind of oil well wireless communication system based on sound wave according to claim 1, it is characterised in that: described standard source (1) produces an audio control signal respectively and a carrier signal is fed in the first electro-acoustic element (3) and the second electro-acoustic element (4)；Described dual pathways power amplifier (2) has two independent channels and processes two signals that standard source (1) sends over respectively.
3. a kind of oil well wireless communication system based on sound wave according to claim 1, it is characterized in that: described down-hole decoding circuit includes the frontend amplifying circuit (14) being sequentially connected with, integration rectification circuit (15), signal conditioning circuit (16) and drive circuit (17), the reception signal of the micro-sound device (6) of deep water resonator cavity amplifies through frontend amplifying circuit (14) successively, integration rectification circuit (15) rectification is sent to signal conditioning circuit (16) and is demodulated processing after processing, signal conditioning circuit (16) sends control signals to drive circuit (17), and then control downhole electrical motor (8).
4. a kind of oil well wireless communication system based on sound wave according to claim 1, it is characterized in that: the micro-sound device (6) of described deep water resonator cavity is vertically placed in deep underwater pipes (12), pressure medium sound wave resonance cavity (9) including inner hollow, pressure medium sound wave resonance cavity (9) has air cavity (10) and the microphone (11) of accommodating gas, air cavity (10) lower end and microphone (11), microphone (11) is connected with down-hole decoding circuit.
null5. a kind of oil well wireless communication system based on sound wave according to claim 3，It is characterized in that: described frontend amplifying circuit includes chip U1、Amplifier U2A and amplifier U2B，It is in series with resistance R6 between 2 and 3 feet of chip U1，It is parallel between 1 and 4 feet of chip U1 with plug J5 after resistance R5 and resistance R9 series connection，It is parallel with electric capacity C6 and electric capacity C7 between 5 and 6 feet of chip U1，It is connected to after electric capacity C1 and electric capacity C2 parallel connection between 8 feet and the ground of chip U1，7 feet of chip U1 are connected to the positive input of amplifier U2A respectively through electric capacity C41 and electric capacity C4，The positive input of amplifier U2A is through resistance R10 ground connection，The reverse input end of amplifier U2A is respectively through resistance R1、Ground connection and the outfan of self after resistance R2，The outfan of amplifier U2A connects the positive input of amplifier U2B through electric capacity C5，The positive input of amplifier U2B is through resistance R7 ground connection，The reverse input end of amplifier U2B is respectively through resistance R3、Ground connection and the outfan of self after resistance R4，Amplifier U2B outfan exports the outfan as frontend amplifying circuit after electric capacity C10，Plug J5 is connected to microphone 11 as the input of frontend amplifying circuit.
null6. a kind of oil well wireless communication system based on sound wave according to claim 3，It is characterized in that: described integration rectification circuit includes amplifier U2C、Amplifier U2D and chip U3，Amplifier U2C and the equal ground connection of amplifier U2D positive input，Amplifier U2C reverse input end is successively through resistance R15、The reverse input end of amplifier U2D it is connected to after resistance R11，Amplifier U2C outfan is connected to reverse input end after diode D1，Respectively through resistance R12 after amplifier U2C outfan connection diode D2、Resistance R16 is connected to amplifier U2C reverse input end and amplifier U2D reverse input end，Electric capacity C9 and resistance R14 it is parallel with between reverse input end and the outfan of amplifier U2D self，The reverse input end of amplifier U2D is connected to 6 feet of chip U3，Amplifier U2D outfan is connected to 5 feet of chip U3 through resistance R13，Amplifier U2D outfan is through diode D3、Ground connection after resistance R18，Amplifier U2D outfan exports the signal output part as integration rectification circuit through resistance R17，Resistance R15、The signal input part as integration rectification circuit is drawn between resistance R11.
7. a kind of oil well wireless communication system based on sound wave according to claim 4, it is characterised in that: the length of described air cavity (10) is λ/2 wavelength, and λ represents the wave length of sound of transmission.
8. a kind of oil well wireless communications method based on sound wave according to claim 1, it is characterized in that: adopt the arbitrary described system of Claims 1 to 5, standard source (1) produces digital acoustic signals, after dual pathways power amplifier (2) amplifies, it is separately sent to the first electro-acoustic element (3) and the second electro-acoustic element (4) produces two acoustic signals, two acoustic signals close road coupled conductor (5) through sound wave and close road output under the narrow-band digital backward deep water of modulation, by by deep water resonator cavity micro-sound device (6), acoustic signals is converted into the signal of telecommunication, it is sent to down-hole decoding circuit to be decoded, it is further conveyed to downhole electrical motor (8), and then control the rotating forward of motor (8), reversion and stopping.
9. a kind of oil well wireless communications method based on sound wave according to claim 8, it is characterised in that: described standard source (1) produces an audio control signal and a carrier signal is fed in the first electro-acoustic element (3) and the second electro-acoustic element (4).
10. a kind of oil well wireless communications method based on sound wave according to claim 8, it is characterised in that: the degree of depth adjustment according to deep water of the frequency of described carrier signal.
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