Water Sound Transceiver Device at the Wellhead of Injection Well

Abstract

The present invention relates to the field of oil extraction, and specifically discloses an acoustic transceiver device for the wellhead of an injection well, which includes an active sensor, an intelligent water distributor, an upper joint, an upper outer sleeve, a conversion joint, a lower outer sleeve, and a lower joint arranged at the working end inside the injection well. The upper joint and the lower joint are provided with water flow holes, and an eccentric through hole is opened inside the conversion joint. The eccentric through hole is connected with an inner sleeve, and a circuit board fixing frame is connected to the inner sleeve. A circuit control board is connected to the circuit board fixing frame. Several circuits for processing signals are arranged inside the circuit control board. An underwater acoustic transducer is detachably connected to the bottom of the conversion joint. A cable channel is opened in the upper joint on one side of the circuit control board, and an AC / DC module is arranged outside the cable channel of the upper joint. A water injection channel and an acoustic channel are opened in the lower joint. The underwater acoustic transducer is electrically connected to the circuit control board, and the underwater acoustic transducer conducts underwater acoustic communication with the active sensor through water, which can effectively solve the problem of unstable communication signals at the wellhead of traditional injection wells.

Description

Technical Field

[0001] The present invention relates to the field of oil exploitation, and particularly to an acoustic transceiver device for the wellhead of an injection well. Background Art

[0002] After an oilfield is put into development, as the exploitation time increases, the reservoir pressure continuously drops, resulting in a significant reduction in the oil well production, and even the well may stop flowing. At this time, in order to make up for the underground void caused by the extracted crude oil, maintain and increase the reservoir pressure, and achieve high and stable production of the oilfield, it is necessary to carry out separate layer water injection. Separate layer water injection is implemented by the isolation of packers and the control of nozzles, so that high, medium, and low permeability formations can all play a role in water injection, thereby realizing a process measure to adjust the interlayer contradiction of the oilfield and improve the water injection sweep efficiency. In different oilfield development stages, due to the different numbers and properties of the target layers put into exploitation, as well as the different objects and requirements of development adjustment, it is necessary to combine fine reservoir description and dynamic characteristic analysis to implement separate layer water injection in order to achieve the purpose of improving the development effect.

[0003] Currently, the main method for separate layer water injection is the cableless intelligent water distributor. The communication methods between its surface device and downhole device mainly include: lowering a communication sub-section for communication or one-way pressure wave communication. The method of lowering a communication sub-section for communication has a relatively high later maintenance cost, while the pressure wave method is mainly for one-way pressure transmission, and one-way pressure wave communication can only send wave code instructions from the surface to the downhole. The downhole water distributor receives the instructions to open or close the nozzle or change the injection allocation. In the intelligent water distribution method, most of the surface devices that generate pressure pulse signals use the method of high-pressure pump boosting. The specific approach is to use the high-pressure water output by the surface high-pressure pump as the pressure source, and generate corresponding pressure pulse signals by manually operating the valves on the pressure source and the wellhead device and transmitting them to the downhole water distribution tool. The disadvantages of this method are that the use of high-pressure pump equipment and manual operation result in high costs, long time consumption, high labor intensity of workers, poor stability of high-pressure pump boosting, poor quality and low reliability of the generated pressure pulse signals, and low signal frequency. When the formation has serious water absorption, it is difficult for the high-pressure pump to form an obvious pressure difference at the wellhead, which affects the generation of pressure pulses and cannot receive the pressure signals uploaded by the downhole water distribution tool.

[0004] Therefore, in view of this, the inventor provides an acoustic transceiver device for the wellhead of an injection well to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to solve the problem of low reliability of the communication signal at the wellhead of a traditional injection well.

[0006] In order to achieve the above object, the basic solution of the present invention provides an acoustic transceiver device for the wellhead of an injection well, which includes an active sensor arranged at the working end inside the injection well, an intelligent water distributor electrically connected to the active sensor, an upper joint connected to the wellhead of the injection well, an upper outer sleeve detachably connected to the outer side of the lower part of the upper joint, a conversion joint detachably connected to the inner side of the lower part of the upper outer sleeve, a lower outer sleeve detachably connected to the outer side of the lower part of the conversion joint, and a lower joint detachably connected to the outer side of the lower part of the lower outer sleeve. The upper joint and the lower joint are provided with water flow holes, and an eccentric through hole is formed inside the conversion joint. The upper joint, the upper outer sleeve, the conversion joint, the lower outer sleeve and the lower joint form a cavity. The eccentric through hole is detachably connected with an inner sleeve. The upper part of the inner sleeve is detachably connected to the water flow hole of the upper joint, and the lower part of the inner sleeve is detachably connected to the water flow hole of the lower joint. A lead channel is formed on one side of the conversion joint, and a lead is arranged inside the lead channel. The conversion joint and the upper joint, the inner sleeve and the upper outer sleeve form an upper chamber of an eccentric ring. A circuit board fixing frame is detachably connected to the inner sleeve inside the upper chamber, and a circuit control board for processing signals is detachably connected to the circuit board fixing frame. The conversion joint and the lower joint, the lower outer sleeve and the inner sleeve form a lower chamber of an eccentric ring. An acoustic transducer is arranged inside the lower chamber. The top of the acoustic transducer is fixedly connected with a connecting piece, and the connecting piece is rotatably connected inside the lead channel of the conversion joint. A cable channel is formed on the upper joint on one side of the circuit control board. The lower joint is provided with a water injection channel and an acoustic channel, and the acoustic channel is communicated with the acoustic transducer. An AC / DC module is arranged outside the cable channel of the upper joint.

[0007] The circuit control board includes a core controller, a transceiver integrated circuit, an LDO power supply and a power amplifier. The core controller is electrically connected to a DA output filter, a bias circuit, a DTU wireless communication module, an LDO power supply and a power amplifier fault alarm circuit. The power amplifier is electrically connected to a power amplifier output filter, the DA output filter and the power amplifier fault alarm circuit. The bias circuit is electrically connected to a preamplifier. The transceiver integrated circuit is electrically connected to a matching circuit and is also electrically connected to the preamplifier. The matching circuit is electrically connected to a step-up transformer. A DC blocking capacitor is electrically connected between the step-up transformer and the power amplifier output filter. The LDO power supply is electrically connected to a DC / DC power supply, and the DC / DC power supply is electrically connected to the AC / DC module. The acoustic transducer is electrically connected to the transceiver integrated circuit inside the circuit control board through the lead inside the lead channel.

[0008] The active sensor includes an acoustic receiving transducer and an acoustic transmitting transducer. The acoustic receiving transducer and the acoustic transmitting transducer inside the active sensor are electrically connected to the control board of the intelligent water distributor. The receiving transducer and the transmitting transducer of the active sensor perform acoustic communication with the acoustic transducer through water.

[0009] The principle and effect of this basic solution are as follows:

[0010] The present invention receives the signals sent by the intelligent water distributor at the working end in the well through an underwater acoustic transducer and an active sensor. After the underwater acoustic transducer converts the underwater acoustic signal into an electrical signal, it is filtered and amplified by a preamplifier, and then through the AD converter built in the core controller, the analog signal is converted into a digital signal. The core controller will determine whether the signal is sent by the underwater acoustic communication device in the well. If not, through a negative feedback system until the detected signal is the underwater acoustic signal sent by the active sensor, which can effectively reduce the operation steps of technicians and reduce the difficulty of using the device.

[0011] After detecting the signal sent by the downhole active sensor, the core controller will demodulate the signal in the next period of time. After parsing the corresponding information, it will perform verification and correction on it, which can reduce signal errors and obtain correct downhole information. After obtaining the correct downhole information, the core controller communicates with the DTU wireless communication module through a serial port and reports the obtained signal to the control center through the Internet, effectively improving the reliability of the signal.

[0012] When the control center needs to modify the parameters of the intelligent water distributor, it sends the data to the wellhead device through the Internet. After the wellhead device encodes and modulates the corresponding information, it converts the digital signal into an analog signal through a DA, and after passing through the DA output filter, it converts the analog signal into a PWM signal for output. Then the PWM signal is sent to the input end of the power amplifier. After the power amplifier modulates and amplifies it, it converts the electrical signal into an underwater acoustic signal through the underwater acoustic transducer and sends it into the downhole active sensor, and then transfers it into the intelligent water distributor, which can flexibly modify the parameters of the intelligent water distributor in the well according to the actual working conditions of the working end in the injection well, ensuring the accuracy and timeliness of communication.

[0013] Compared with the prior art, the underwater acoustic communication carried out by the underwater acoustic communication system in the well is more intelligent and stable than the signal generated by the high-pressure pump boosting. It can exchange data with the remote control center, without manual operation, realize the data reporting in the injection well, bridge the remote control center and the intelligent water distributor in the injection well, so that the control instructions of the control center can be sent to the underwater acoustic communication device in the well, and thus each injection well can be monitored and controlled remotely. Moreover, the structural design of the invention can reduce the influence of environmental noise and reduce the expenditure of manpower and material resources.

[0014] Furthermore, the preamplifier is provided with multiple-stage filters. By setting multiple-stage filters in the preamplifier, the brick-wall coefficient of the filter is improved, thereby reducing the frequency band through which noise can pass, further reducing noise, and enhancing the performance of the system.

[0015] Further, the DC / DC power supply is a high-frequency DC / DC power supply. The adopted high-frequency DC / DC power supply is of a high-frequency synchronous BUCK structure, with an input voltage range of 4V to 36V, an efficiency of over 95%, reducing standby power consumption. At the same time, it also has a protection function, improving the reliability of the instrument. Moreover, the components of the high-frequency DC / DC power supply are relatively small in volume, providing more options for the overall design within a relatively small device space.

[0016] Further, the power amplifier is a class-D high-frequency power amplifier. Adopting a class-D high-frequency power amplifier can effectively reduce the volume of components in the device, and this power amplifier has an excellent protection system, including output short-circuit protection and over-temperature protection, thus improving the reliability of the system.

[0017] Further, seal ring grooves are provided at the joints of the upper connector, lower connector, upper outer sleeve, lower outer sleeve, and inner sleeve. Installing seal ring grooves at the joints can increase the airtightness of the device, achieving the effect of protecting the circuit components inside the device. Further, a positioning pin is provided inside the adapter. Installing a positioning pin inside the adapter can fix the position of the inner sleeve detachably connected to the adapter, preventing the problem of unstable signal transmission and reception caused by the offset of the inner sleeve during operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a cross-sectional view of the underwater acoustic transceiver device at the wellhead of an injection well according to an embodiment of the present invention;

[0019] Figure 2 is a circuit structure diagram of the underwater acoustic transceiver device at the wellhead of an injection well according to an embodiment of the present invention;

[0020] Figure 3 is a circuit structure diagram of the preamplifier according to an embodiment of the present invention;

[0021] Figure 4 is a signal reception flowchart of the underwater acoustic transceiver device at the wellhead of an injection well according to an embodiment of the present invention;

[0022] Figure 5 is a signal transmission flowchart of the underwater acoustic transceiver device at the wellhead of an injection well according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0023] The following is a more detailed description through specific embodiments:

[0024] The reference numerals in the drawings of the specification include: upper joint 1, upper outer sleeve 2, circuit control board 3, inner sleeve 4, circuit board fixing bracket 5, adapter joint 6, underwater acoustic transducer 7, lower outer sleeve 8, lower joint 9, output power matching circuit 11, transceiver integrated circuit 12, preamplifier 13, bias circuit 14, step-up transformer 15, core controller 16, LDO power supply 17, DC / DC power supply 18, DC blocking capacitor 19, DA output filter circuit 20, DTU wireless communication module 21, AC / DC module 22, power amplifier output filter 23, power amplifier 24, power amplifier fault alarm circuit 25.

[0025] The water acoustic transceiver device at the wellhead of the water injection well, for example, Figure 1 as shown. It includes an active sensor arranged at the working end in the water injection well, an intelligent water distributor electrically connected to the active sensor, and an upper joint 1 connected to the wellhead of the water injection well. An internal thread is provided on the outer side of the lower part of the upper joint 1. An upper outer sleeve 2 is threadedly connected to the upper joint. An internal thread is provided on the outer side of the lower part of the upper outer sleeve 2. An adapter joint 6 is threadedly connected to the lower part of the upper outer sleeve 2. An external thread is provided on the outer side of the lower part of the adapter joint 6. A lower outer sleeve 8 is threadedly connected to the outer side of the lower part of the adapter joint 6. An internal thread is provided on the outer side of the lower part of the lower outer sleeve 8. A lower joint 9 is threadedly connected to the lower outer sleeve 8. Two sealing ring grooves are installed at the threaded connection parts.

[0026] The upper joint 1 and the lower joint 9 are provided with water flow holes. An eccentric through hole is provided in the adapter joint 6. The upper joint 1, the upper outer sleeve 2, the adapter joint 6, the lower outer sleeve 8, and the lower joint 9 form a cavity. The eccentric through hole is bolted with an inner sleeve 4. The upper part of the inner sleeve 4 is bolted to the water flow hole of the upper joint 1, and the lower part of the inner sleeve is bolted to the water flow hole of the lower joint 9. A lead channel is provided on one side of the adapter joint 6. The adapter joint 6 and the upper joint, the inner sleeve, and the upper outer sleeve form an upper chamber of an eccentric ring. A circuit board fixing bracket 5 is bolted to the inner sleeve in the upper chamber, and the circuit board fixing bracket is installed on one side of the lead channel. A circuit control board 3 for processing signals is bolted to the circuit board fixing bracket 5. The adapter joint 6 and the lower joint 9, the lower outer sleeve 8, and the inner sleeve 4 form a lower chamber of an eccentric ring. An underwater acoustic transducer 7 is arranged in the lower chamber. A connecting piece is fixedly connected to the top of the underwater acoustic transducer 7, and the connecting piece is rotatably connected in the lead channel of the adapter joint 6. A cable channel is provided in the upper joint 1 on one side of the circuit control board 3. The power supply outside the water injection well is electrically connected to the circuit control board 3 through the cable channel. A water injection channel and an acoustic channel are provided in the lower joint 9. The acoustic channel is communicated with the underwater acoustic transducer 7. An AC / DC module 22 for transforming the power supply is arranged outside the cable channel of the upper joint.

[0027] The circuit structure diagram of the water acoustic transceiver device at the wellhead of the water injection well, for example, Figure 2As shown in the figure, it includes an AC / DC module 22, an underwater acoustic transducer 7, and a core controller 16. The core controller 16 has an AD interface and a DA interface. The output end of the underwater acoustic transducer 7 is electrically connected to a transceiver combined circuit 12 inside the circuit control board 3 through a lead slot. The output end of the transceiver combined circuit 12 is connected with a DC blocking capacitor 19. The DC blocking capacitor 19 is electrically connected to a preamplifier 13. The output end of the preamplifier 13 is electrically connected to a bias circuit 14. The bias circuit 14 is electrically connected to the AD interface on the core controller 16. The DA output interface of the core board is electrically connected to a DA output filter 20. The output end of the DA output filter 20 is electrically connected to the signal input end of a power amplifier 24. The output end of the power amplifier 24 is electrically connected to an output filter 23 and a power amplifier fault circuit alarm circuit 25. The output filter 23 is electrically connected to a step-up transformer 15 through a DC blocking capacitor 19. The output end of the step-up transformer 15 is electrically connected to an output matching circuit 11. The output matching circuit 11 is finally electrically connected to the underwater acoustic transducer 7. The AC / DC module 22 is electrically connected to a DC / DC power supply 18. The DC / DC power supply 18 is electrically connected to an LDO power supply 17. The output end of the LDO power supply 17 is electrically connected to the core controller 16. The input end of the core controller 16 is also electrically connected to a DTU wireless communication module 21 and a power amplifier fault circuit alarm circuit 25. The underwater acoustic transducer 7 is electrically connected to the transceiver combined circuit 12 inside the circuit control board 3 through the leads in the lead channel.

[0028] The active sensor includes an underwater acoustic receiving transducer and an underwater acoustic transmitting transducer. The underwater acoustic receiving transducer and the underwater acoustic transmitting transducer inside the active sensor are electrically connected to the control board of the intelligent water distributor. The underwater acoustic receiving transducer and the underwater acoustic transmitting transducer of the active sensor perform underwater acoustic communication with the underwater acoustic transducer 7 through water.

[0029] When receiving the signal sent by the intelligent water distributor, as shown in the embodiment Figure 3 , Figure 4 shown. The active sensor converts the electrical signal sent by the intelligent water distributor into an underwater acoustic signal through the underwater acoustic receiving transducer, and then transmits the underwater acoustic signal through the acoustic wave vibration in the water to the underwater acoustic transducer 7 through the underwater acoustic transmitting transducer. The underwater acoustic transducer 7 will generate an electrical signal, which is an analog signal. The analog signal will be transmitted to the preamplifier 13 through the transceiver combined circuit 12, filter out the noise signal in the analog signal, and amplify the in-band signal. The preamplifier 13 is divided into five levels. The first level is a non-inverting amplifier for amplifying the signal. The second to fifth levels are eighth-order Butterworth band-pass filters. The output of the band-pass filter is connected to the AD input pin of the core controller 16. After the analog signal is amplified by the preamplifier 13, it passes through the bias circuit 14 to prevent the analog signal from being distorted, and then enters the core controller 16 through the AD interface on the core controller 16.

[0030] The AD converter built into the core controller 16 samples the received signal at a frequency 3 to 5 times that of the signal, converts the analog signal into a digital signal. The collected signal undergoes sync header detection to check if there is a sync signal. If not, it continues to detect the sync header signal. After detecting the sync header signal, it continues to collect the subsequent valid signals, and then demodulates, decodes, and deinterleaves the collected signals. After obtaining the correct downhole information, the core controller 16 communicates with the DTU wireless communication module 21 through the serial port and reports the obtained signal to the control center via the Internet.

[0031] When the control center needs to modify the parameters of the intelligent water distributor, the implementation example is as follows Figure 5 as shown. The control center sends the signal into the core controller 16 through the DTU wireless communication module 21. After the core controller 16 interleaves, encodes, modulates, and groups the code for the signal, it converts the digital signal into an analog signal through the built-in DA converter, and then filters out the sampling frequency through the electrically connected DA output filter 20. The processed analog signal will be transmitted into the power amplifier 24, and the analog signal is converted into a corresponding PWM signal for output. If the power amplifier 24 fails, the power amplifier fault alarm circuit 25 will send a signal to the core controller 16 for technicians to repair. After the conversion is completed, the PWM signal is further noise-reduced through the power amplifier output filter 23, and then enters the step-up transformer 15 through the blocking capacitor 19 for voltage boosting. A blocking capacitor 19 is provided between the power amplifier output filter 23 and the step-up transformer 15 to prevent the step-up transformer 15 from saturating. After voltage boosting, the analog signal is transmitted to the transceiver combined circuit 12 through the output power matching circuit 11. Finally, the electrical signal is converted into an underwater acoustic signal through the underwater acoustic transducer 7, and then the underwater acoustic signal is transmitted through the acoustic channel to the underwater acoustic receiving transducer of the active sensor at the downhole working end. The active sensor converts the underwater acoustic signal into an electrical signal and transmits it to the control board of the intelligent water distributor through the underwater acoustic transmitting transducer. Finally, the intelligent water distributor at the downhole working end modifies the corresponding parameters according to the received underwater acoustic signal.

[0032] The present invention uses water as a medium for signal transmission, which is more stable compared to the signals generated by the traditional method of boosting pressure with a high-pressure pump, and does not require manual operation, nor does it need to consider the serious water absorption of the formation. At the same time, the core controller 16 can accurately identify whether the sound emitted from the downhole is the underwater acoustic signal emitted by the active sensor. Technicians can flexibly modify the parameters of the intelligent water distributor at the downhole working end according to the actual working conditions of the water injection well, ensuring the accuracy and timeliness of communication, and improving the reliability and stability of the signal.

[0033] The above are only embodiments of the present invention. Specific structures and common knowledge such as characteristics well known in the art are not described in detail herein. Those of ordinary skill in the art know all the common general technical knowledge in the technical field to which the invention pertains before the filing date or the priority date, can learn all the prior art in this field, and have the ability to apply conventional experimental means before this date. Those of ordinary skill in the art can, under the inspiration given in this application, complete and implement this solution in combination with their own abilities. Some typical well-known structures or well-known methods should not become obstacles for those of ordinary skill in the art to implement this application. It should be noted that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can still be made, and these should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope claimed in this application shall be subject to the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. Water sound transceiver device at the wellhead of an injection well, characterized in that It includes an active sensor installed at the working end inside the water injection well, an intelligent water distributor electrically connected to the active sensor, an upper joint connected to the wellhead of the water injection well, an upper outer sleeve detachably connected to the outer side of the lower part of the upper joint, a conversion joint detachably connected to the inner side of the lower part of the upper outer sleeve, a lower outer sleeve detachably connected to the outer side of the lower part of the conversion joint, and a lower joint detachably connected to the outer side of the lower part of the lower outer sleeve. The upper joint and the lower joint are provided with water flow holes. An eccentric through hole is formed inside the conversion joint. The upper joint, the upper outer sleeve, the conversion joint, the lower outer sleeve, and the lower joint form a cavity. The eccentric through hole is detachably connected with an inner sleeve. The upper part of the inner sleeve is detachably connected with the water flow hole of the upper joint, and the lower part of the inner sleeve is detachably connected with the water flow hole of the lower joint. A lead channel is formed on one side of the conversion joint, and a lead is arranged inside the lead channel. The conversion joint, the upper joint, the inner sleeve, and the upper outer sleeve form an upper chamber of an eccentric ring. A circuit board fixing frame is detachably connected to the inner sleeve inside the upper chamber. A circuit control board for processing signals is detachably connected to the circuit board fixing frame. The conversion joint, the lower joint, the lower outer sleeve, and the inner sleeve form a lower chamber of an eccentric ring. An underwater acoustic transducer is arranged inside the lower chamber. A connecting piece is fixedly connected to the top of the underwater acoustic transducer, and the connecting piece is rotatably connected inside the lead channel of the conversion joint. A cable channel is formed on the upper joint on one side of the circuit control board. The lower joint is provided with a water injection channel and an acoustic channel, and the acoustic channel is communicated with the underwater acoustic transducer. An AC / DC module is arranged outside the cable channel of the upper joint; The circuit control board includes a core controller, a transceiver integrated circuit, an LDO power supply, and a power amplifier. The core controller is electrically connected to a DA output filter, a bias circuit, a DTU wireless communication module, an LDO power supply, and a power amplifier fault alarm circuit. The power amplifier is electrically connected to a power amplifier output filter, a DA output filter, and a power amplifier fault alarm circuit. The bias circuit is electrically connected to a preamplifier. The transceiver integrated circuit is electrically connected to a matching circuit and is also electrically connected to the preamplifier. The matching circuit is electrically connected to a step-up transformer. A DC blocking capacitor is electrically connected between the step-up transformer and the power amplifier output filter. The LDO power supply is electrically connected to a DC / DC power supply, and the DC / DC power supply is electrically connected to the AC / DC module. The underwater acoustic transducer is electrically connected to the transceiver integrated circuit inside the circuit control board through the lead inside the lead channel; The active sensor includes an underwater acoustic receiving transducer and an underwater acoustic transmitting transducer. The underwater acoustic receiving transducer and the underwater acoustic transmitting transducer inside the active sensor are electrically connected to the control board of the intelligent water distributor. The underwater acoustic receiving transducer and the underwater acoustic transmitting transducer of the active sensor perform underwater acoustic communication with the underwater acoustic transducer through water; When the control center needs to modify the parameters of the intelligent water distributor, the control center sends a signal to the core controller through the DTU wireless communication module, converts the signal into a PWM signal for output; converts the electrical signal into an underwater acoustic signal through the underwater acoustic transducer, and transmits the underwater acoustic signal to the underwater acoustic receiving transducer of the active sensor at the working end inside the well through the acoustic channel; The core controller samples the signals. The collected signals are subjected to sync header detection to check if there is a sync signal. If not, the sync header signal is continuously detected. After detecting the sync header signal, the subsequent valid signals are continuously collected, and then the collected signals are demodulated, decoded, and deinterleaved to obtain the correct downhole information. After obtaining the correct downhole information, the core controller communicates with the DTU wireless communication module through the serial port and reports the obtained signals to the control center via the Internet.

2. The acoustic transceiver device for the wellhead of an injection well according to claim 1, wherein: Multiple filters are provided inside the preamplifier.

3. The acoustic transceiver device at the wellhead of the water injection well according to claim 1, wherein: The DC / DC power supply is a high-frequency DC / DC power supply.

4. The acoustic transceiver device for the wellhead of an injection well according to claim 1, wherein: The power amplifier is a class D high-frequency power amplifier.

5. The acoustic transceiver device for the wellhead of an injection well according to claim 1, characterized in that: Sealing ring grooves are provided at the joints of the upper connector, lower connector, upper outer sleeve, lower outer sleeve, and inner sleeve.

6. The acoustic transceiver device for the wellhead of an injection well according to claim 1, characterized in that: A positioning pin is provided inside the adapter.

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