Sound wave receiving transducer and underground azimuth noise leak detecting device and method

[0020] The present invention will be described in detail below with reference to the accompanying drawings.

[0021] like figure 1 As shown, an acoustic wave receiving transducer is composed of a piezoelectric ceramic cylinder and a plurality of rectangular strips of silver electrodes arranged along the circumferential direction on the inner and outer walls of the piezoelectric ceramic cylinder. The inner and outer walls of the piezoelectric ceramic cylinder are covered at equal intervals, and the corresponding silver electrodes on the inner and outer walls of the piezoelectric ceramic cylinder are connected together by the silver bridge 103 covering the top or bottom edge of the piezoelectric ceramic cylinder. The polarization direction of the piezoelectric ceramics between the silver electrodes is parallel to the tangential direction of the piezoelectric ceramic cylinder. After the piezoelectric ceramics between the silver electrodes are polarized, a positive electrode 102 and a negative electrode 101 are formed. 101 are alternately arranged along the circumferential direction of the piezoelectric ceramic cylinder.

[0022] 16 silver electrodes are formed on the inner and outer walls of the piezoelectric ceramic cylinder respectively by screen printing, and the piezoelectric ceramics between the 16 silver electrodes are polarized to form 8 positive electrodes spaced along the circumference of the piezoelectric ceramic cylinder 102 and 8 negative electrodes 101, the 8 positive electrodes are divided into 4 groups, and the combination of the three most basic vibration modes of the piezoelectric ceramic cylinder transducer is controlled by connecting different voltages to the 4 groups of different positive electrodes to generate direction Radiation, so as to achieve the directionality of the horizontal direction. The acoustic wave receiving transducer uses a directional ring transducer to replace the ordinary downhole radially polarized ring transducer. The downhole radially polarized ring transducer used in the current noise leakage detector does not point in the horizontal direction. The directional, directional ring transducer is to generate directional radiation by controlling the combination of the three most basic vibration modes of the piezoelectric ring transducer, so as to realize the directional directivity in the horizontal direction. The acoustic wave receiving transducer of the present invention is excited by the electric signal applied on the annular electrode, and by this method, the directivity can be obtained in the horizontal direction.

[0023] The acoustic wave receiving transducer of the present invention provides directivity through the multi-modal excitation of the ring, and the synthesis principle of the directivity is:

[0024] n-order expansion mode The radial motion will produce a radial sound pressure, and its azimuthal directivity factor in the horizontal direction is The n=0 mode produces a monopole beam pattern, the n=1 mode produces a dipole beam pattern, and the n=2 mode produces a quadrupole beam pattern.

[0025] In theory, any directivity function or beam pattern can be obtained by

[0026]

[0027] of which: P n ( ) represents the Legendre function. Consider its first three-order expansion modes in our study, namely

[0028]

[0029] The beam pattern of the super-directional transducer can be obtained from the above formula.

[0030]Add the monopole, dipole, and quadrupole in the ratio of 1:1:0.414 (A=1, B=0.414) to get the minimum supercardioid beam pattern, and the corresponding beam pattern function is

[0031]

[0032] The present invention replaces the common downhole polarized ring transducer with a directional transducer, and the directional transducer adopts modal superposition, which can combine the three basic modes of the ring to generate a complex vibration, and This complex vibration can make the transducer produce corresponding directivity. When it radiates sound waves, in its sound field, along different directions, even at the same distance, the sound pressure may be different. That is, their launch response is direction dependent. By applying different voltages (ie, weighting coefficients) to the 8 electrodes, there will be different directivities. By selecting an appropriate weighting coefficient, directivity can be formed in the horizontal direction.

[0033] The acoustic wave receiving transducer of the present invention produces super directivity, which requires a suitable voltage distribution to excite the desired vibration mode. Circumferential voltage distribution to motivate expansion mode. The transducer must undergo polarization treatment to have piezoelectric effect. The acoustic wave acoustic wave receiving transducer of the present invention adopts tangential polarization to have 16 silver layers, and the polarization direction of each silver electrode is parallel to the radial direction of the piezoelectric ceramic cylinder. The polarization results are as follows: 8 poles are negative poles, 8 poles are positive poles, and they are insulated from each other. The 8 negative electrodes of the piezoelectric ring are all connected together to form the negative electrode of the acoustic wave receiving transducer, and the 8 positive electrodes on the inner surface of the piezoelectric ring transducer are divided into four pairs, and the voltage distribution on the electrodes is one. Quaternary vector: If it is [1, 1, 1, 1], the monopole mode with n=0 can be excited; if it is [1, 1, -1, -1], n=1 ground can be excited The dipole mode, if it is [l, - 1, - 1, 1], can excite the quadrupole mode with n=2. Using the superposition of the three modes, super directivity can be formed.

[0034] like figure 2 and image 3 , the present invention also discloses an underground noise leak detection device, comprising an acoustic wave receiving transducer 1, an electronic warehouse 2 and a data transceiver module 3 connected in sequence, the data transceiver module is connected with the ground system through a cable 4, and the electronic warehouse 2 includes The time-division steering circuit connected with the transducer 1 is connected in turn with a pre-processing circuit for processing the transmission signal, a low-pass filter circuit, a variable gain amplifier circuit, a voltage amplifier circuit and an A/D circuit. The conversion circuit, the A/D conversion circuit and the variable gain amplifier circuit are respectively connected with the control circuit, the control circuit is connected with the CAN bus, and the control circuit is connected with the data transceiver module 3 via the CAN bus; the acoustic wave receiving transducer 1 is composed of 16 silver electrodes It is composed of 16 piezoelectric ceramic sheets, and the electrode polarization results are that 8 are negative electrodes and 8 are positive electrodes. All the 8 negative electrodes of the transducer are connected to the outer surface of the cylinder, and the inner surface of the transducer is connected. The 8 positive electrodes are divided into four pairs, and the voltage distribution on the four pairs of positive electrodes is a quaternary vector: if it is [1, 1, 1, 1], the monopole mode with n=0 can be excited, if If it is [1,1,−1,−1], the dipole mode with n=1 can be excited. If it is [1,−1,−1,1], the quadrupole mode with n=2 can be excited. , the super-directivity is formed by the superposition of the three modes, and the super-directivity in different directions is formed by controlling the voltage of different positive electrodes through a time-division steering circuit.

[0035] The time-sharing steering circuit includes six electronic switches connected to the control circuit and four transformers T1, T2, T3, T4, each transformer includes one primary coil and four secondary coils, wherein the four electronic switches are respectively Connect with 4 transformers T1, T2, T3, T4, and control the on and off of the transformers T1, T2, T3, T4 and the four pairs of positive electrodes inside the transducer through the electronic switch, so that the transducer can be connected to the four pairs of positive electrodes in the south, east, north and west. In the transformation of the beam direction, the input terminals of the primary coils of each transformer are connected to the pre-processing circuit, and the other two electronic switches are respectively connected to the 8 positive electrodes of the transducer, and the 8 positive electrodes of the transducer are controlled by the two electronic switches. The positive electrodes are connected in time-sharing and divided into four pairs to realize the transformation of different wiring modes of the transducer in the north-south and east-west directions. The four secondary coil output ports of each transformer are connected to four pairs of transducers through analog electronic switches The positive electrode is connected, the voltage on the four pairs of positive electrodes is distributed according to +2.414:+1.586:-0.414:-0.414, and the four pairs of positive electrodes with four different connection methods are powered by four transformers T1, T2, T3, and T4. , the transducer piezoelectric ceramic cylinder receives sound waves from four directions in a time-sharing manner, and obtains sound wave signals in different directions. The conduction of different transformers is controlled by the control circuit to supply power to different electrodes of the transducer to achieve directivity in different directions.

[0036] In the present invention, a sound wave receiving transducer is arranged at the bottom of the device, and an electronic warehouse and a data transceiver module are arranged on the upper part of the transducer, which are then connected with the ground system through cables.

[0037] The electronic warehouse signal of the present invention mainly performs a series of adjustments on the electrical signal converted by the transducer, goes through preprocessing, voltage amplification, and A/D conversion in sequence, and then sends the electrical signal to the CAN bus to realize the downhole and uphole data. Transmission, the logging data received by the downhole acoustic wave receiving transducer is transmitted to the data transceiver module.

[0038] The data transceiver module of the present invention mainly receives the electrical signal sent by the downhole transducer and transmits the electrical signal to the ground system through the armored cable.

[0039] The transmission cable of the present invention is an armored cable.

[0040] In the invention, the time-sharing steering circuit is used to control the transducer to dynamically collect the acoustic signals emitted around the geological structure in the four directions of the underground, south-east, north-west, and then use the directional transducer to convert the received acoustic signals into electrical signals, and then use the electronic The warehouse performs related processing such as amplification and A/D conversion on the electrical signal, and then sends the electrical signal to the CAN bus, and then sends the electrical signal to the ground system through the transmission cable, and finally uses the computer to analyze and process the received logging data.

[0041] exist figure 2 Among them, the underground noise leak detection device of this embodiment is composed of an acoustic wave receiving transducer 1 , an electronic warehouse 2 , a data transceiver module 3 , a cable 4 , and a casing 5 connected together. The casing 5 is placed in the well fluid 8 to seal between the casing and the well wall with sealing cement 6, an electronic warehouse 2 is installed on the upper end of the acoustic wave receiving transducer 1, and a data transceiver module 3 is installed on the upper end of the electronic warehouse 2. , the upper end of the data transceiver module 3 is connected with a cable, which is connected with the ground system through the cable, and the acoustic wave signals in different directions of the formation 7 are obtained through the transducer 1 .

[0042] Combine below Figure 4 to Figure 6 The process of forming the directivity of the present invention in one direction north is described as follows:

[0043] The n-order expansion mode of this embodiment is The radial motion of , produces a radial sound pressure whose azimuthal directivity factor in the horizontal direction is The n=0 mode produces a monopole beam pattern, the n=1 mode produces a dipole beam pattern, and the n=2 mode produces a quadrupole beam pattern. Their beam patterns are as follows Figure 4 shown.

[0044] The time-sharing working circuit of the transducer in this embodiment is formed by connecting a transformer T and a transducer Z. The transducer Z is a directional annular transducer, the input ports of the primary coil of the transformer T are numbered 1 and 2 respectively, and the transformer T The output ports of the secondary coil are numbered 3 to 10 respectively, the positive electrodes of the transducer Z are numbered 1 to 8, and the internal electrodes of the transducer Z are numbered 1, 2, 3, 8, 4, 7, 5 The ports of , 6 are respectively connected, and then numbered as I, II, III, and IV respectively. The input port 1 of the primary coil of the transformer T is connected to the 2 pin of the socket JP, the 2 terminal is connected to the 1 pin of the socket JP, and the secondary coil of the transformer T is 3. , 5, 7, and 9 ports are respectively connected to the ports numbered I, II, III, and IV on the transducer Z. The secondary coils 4, 6, 8, and 10 of the transformer T are grounded together, and the negative electrode of the transducer is grounded. .

[0045] The directivity of the directional ring transducer in this embodiment is formed by controlling the combination of the three most basic vibration modes of the piezoelectric ring transducer to generate directional radiation, thereby realizing the directional directivity in the horizontal direction.

[0046] This embodiment mainly uses the principle of electromagnetic induction of the transformer to realize the monopole, and the dipole and the quadrupole are weighted in a proportional relationship of 1:1:0.414, so that the weighted voltage distribution is used to excite the expected transducer of the transducer. Vibration mode, and finally form super directivity, the minimum required super cardioid beam pattern is as follows Figure 5 shown.

[0047] Combine below figure 2 The working process of the azimuth noise leak detection device of the present invention in the four directions of southeast, northwest and northwest is described as follows:

[0048] The above description is only for the directivity of one direction north, and the formation principle of the directivity of the other three directions is similar to the principle of one direction north. A device that can change the beam direction in a time-sharing manner completes the entire logging process. The specific scheme is described as follows:

[0049] image 3 A structural block diagram of the electronic warehouse 2 of the present invention is given. exist image 3 Among them, the electronic warehouse of this embodiment consists of a transducer, a time-sharing steering circuit, a pre-processing circuit, a low-pass filter circuit, a variable gain amplifier circuit, a voltage amplifier circuit, an A/D conversion circuit, a CAN bus circuit, and a control circuit. Circuit connection structure, the output terminal of the transducer is connected to the time-sharing steering circuit, and the output terminal of the time-sharing steering circuit is connected to the pre-processing circuit, and the received signal is impedance matched and amplified by the pre-processing circuit, and the pre-processing circuit The output end of the circuit is connected to the low-pass filter circuit, the output end of the low-pass filter circuit is connected to the variable gain amplifier circuit, the output end of the variable gain amplifier circuit is connected to the voltage amplifier circuit, and the output end of the voltage amplifier circuit is connected to the A/D conversion circuit, The output of the A/D conversion circuit is connected to the control circuit, and the control circuit is respectively connected to the variable gain amplifier circuit, the A\D conversion circuit and the CAN bus circuit.

[0050] The analog electronic switch adopts CD4066, which is a four-way analog switch, which is mainly used for multiplexing of analog or digital signals. There are 4 independent analog switches inside each package of CD4066, each analog switch has three terminals of input, output and control, among which the input and output are interchangeable. When the control terminal adds a high level, the switch is turned on; when the control terminal adds a low level, the switch is turned off.

[0051] like Image 6As shown in (a), the time-sharing steering circuit of this embodiment is composed of integrated circuits U1A to U1F, transformers T1 to T4, and transducer Z. The models of integrated circuits U1A to U1F are CD4066, and the transducers Z is a directional ring transducer, the input ports of the primary coils of transformers T1 to T4 are numbered 1 and 2 respectively, the output ports of the secondary coils of transformers T1 to T4 are numbered 3 to 10 respectively, and the positive electrodes of transducer Z are respectively labeled 1~8, the transformer T1~T4 primary coil input port 1 is connected to the 2 pins of the socket JP1~JP4 respectively, the 2 pins of the socket JP1~JP4 are connected together with the socket JP5 2 connection, the transformer T1~T4 primary coil input terminal The 2 ports are respectively connected to the 1 pin of the sockets JP1~JP4, the 1 pin of the sockets JP1~JP4 are grounded, and the 3, 5, 7 and 9 ports of the secondary coils of the transformers T1~T4 are respectively connected to the INA~IND ports of the integrated circuits U1A~U1D. The ports 4, 6, 8, and 10 of the secondary coils of the transformers T1 to T4 are grounded respectively, the VCC and VSS ports of the integrated circuits U1A to U1F are respectively connected to the positive pole and ground of the 5V power supply, and the OUTA to OUTD ports of the integrated circuits U1A and U1C are respectively connected to the ground. Connect the INA to IND ports of the integrated circuit U1E, the OUTA to OUTD ports of the integrated circuits U1B and U1D are respectively connected to the INA to IND ports of the integrated circuit U1F, and the INA to IND ports of the integrated circuit U1E are respectively connected to the positive electrodes 1 and 1 of the transducer Z. Ports 3, 7, and 6, the OUTA to OUTD ports of the integrated circuit U1E are respectively connected to the 2, 4, 8, and 5 ports of the positive electrode of the transducer Z, and the INA to IND ports of the integrated circuit U1F are respectively connected to the positive electrodes of the transducer Z. Ports 7, 6, 2, and 3, the OUTA to OUTD ports of the integrated circuit U1F are respectively connected to the 8, 5, 1, and 4 ports of the positive electrode of the transducer Z, and the common terminals of the CONA to COND ports of the integrated circuit U1A to the integrated circuit U1F They are respectively connected to the P1.0~P1.5 ports of the integrated circuit U13, and the negative electrode of the transducer is grounded.

[0052] When the CONA~COND ports of U1A are all set to 1 by the control circuit, the CONA~COND ports of U1E are all set to 1 by the control circuit, so that the wiring method of transducer Z is as follows Figure 7 As shown in a, the transducer produces directivity in the north direction; when the CONA-COND ports of U1B are all set to 1 by the control circuit, the CONA-COND ports of U1F are all set to 1 by the control circuit to make the transducer Z The wiring method is as Figure 7 As shown in b, the transducer produces directivity in the direction west; when the CONA-COND ports of U1C are all set to 1 by the control circuit, the CONA-COND ports of U1E are all set to 1 by the control circuit to make the transducer Z The wiring method is as Figure 7 As shown in c, the transducer produces directivity in the south direction; when the CONA-COND ports of U1D are all set to 1 through the control circuit, the CONA-COND ports of U1F are all set to 1 through the control circuit to make the transducer Z The wiring method is as Figure 7 d, at this time, the transducer produces directivity in the direction east. Thus, the leak detection process of the whole azimuth noise leak detection device in four directions in four directions is completed in time-sharing.

[0053] like Image 6 As shown in (b), the pre-processing circuit of this embodiment is formed by connecting an integrated circuit U2, resistors R1 to R3, and capacitor C1, and the model of the integrated circuit U2 is OPA27AJ. The inverting input terminal 2 of the integrated circuit U2 is connected to the 2-pin of the socket JP5 and grounded through the resistor R2. The non-inverting input terminal 3 is connected to one end of the capacitor C1 through the resistor R1 and the output terminal 6 through the resistor R3. The positive pole of the power supply, pin 4 is grounded, the other end of the capacitor C1 is connected to the pin 1 of the socket JP5, the pin 2 of the socket JP5 is connected to the pin 2 of JP1, the pin 1 of the socket JP5 is grounded, the output end of the integrated circuit U2 is connected to the low pass through the capacitor C2 filter circuit.

[0054] like Image 6 As shown in (b), the low-pass filter circuit of this embodiment is formed by connecting an integrated circuit U3, resistors R4 to R7, a capacitor C3, and a capacitor C4. The model of the integrated circuit U3 is OPA27AJ. One end of the resistor R6 is connected to the inverting input terminal 2 of the integrated circuit U3, the other end of the resistor R6 is grounded, and is connected to the output terminal 6 through the resistor R7, and one end of the resistor R5 is connected to the non-inverting input terminal of the integrated circuit U2. C4 is grounded, the other end of the resistor R5 is connected to the output terminal 6 of the integrated circuit U2 through the resistor R4, and is connected to the output terminal 6 of the integrated circuit U3 through C3, and the output terminal 6 of the U4 is connected to the variable gain amplifier circuit through the capacitor C5.

[0055] like Image 6 As shown in (b), the variable gain amplifier circuit of this embodiment is composed of integrated circuits U4 to U6, resistor R8, resistor R9, and capacitor C6. The model of integrated circuit U4 is AD603AQ, and the model of integrated circuit U4 is MAX541 , the model of the integrated circuit U6 is MAX6225. Pin 3 of IC U4 is connected to pin 6 of the output end of IC U2 through capacitor C5, pin 4 of IC U4 is grounded, pin 6 of IC U4 is connected to the negative pole of 5V power supply, and pin 8 of IC U4 is connected to the positive pole of 5V power supply. Pin 2 of circuit U4 is connected to the positive pole of the 2.5V power supply through resistor R8, and is grounded through the parallel circuit of R9 and C6. Pin 1 of IC U4 is connected to pin 1 of IC U5, and pins 2 and 3 of IC U5 are grounded. Pin 4 of circuit U5 is connected to pin 1 of IC U6, pin 5 of IC U5 is connected to port P0.6 of IC U12, pin 6 of IC U5 is connected to port P0.7 of IC U12, and pin 7 of IC U5 is connected to port P0.7 of IC U12. The pin is connected to the P3.0 port of the integrated circuit U12, the 8-pin of the integrated circuit U5 and the 2-pin of the integrated circuit U6 are connected to the positive pole of the 5V power supply, the output terminal 7 of the integrated circuit U4 is connected to the 5-pin of the integrated circuit U4, and the capacitor C7 Connect the amplifier circuit.

[0056] like Image 6 As shown in (b), the amplifier circuit of this embodiment is formed by connecting an integrated circuit U7, a resistor R10, and a resistor R11, and the model of the integrated circuit U7 is OPA27AJ. The inverting input terminal 2 of the integrated circuit U7 is connected to the output terminal of the variable gain amplifier through the resistor R10 and the capacitor C7, and is connected to the output terminal 6 through the resistor R11. Pin 4 is grounded, and pin 6 is connected to the A/D conversion circuit.

[0057] like Image 6 As shown in (b), the A/D conversion circuit of this embodiment is composed of an integrated circuit U8, a resistor R12 to a resistor R16, and a capacitor C8 connected together. The model of the integrated circuit U8 is ADC0804. Pin 1 of IC U8 is connected to port P0.6 of IC U12, pin 2 is connected to port P3.6 of IC U12, pin 3 is connected to port P3.7 of IC U12, pin 4 is connected to pin 19 through R13, and is connected with One end of capacitor C8 is connected, the other end of C8 is connected to pin 7, pin 7, pin 8, and pin 10 are grounded, one end of R16 is connected to pin 10, the other end is connected to pin 9, and is connected to the positive pole of 5V power supply through R15, and pin 20 is connected to 5V power supply Positive, the DB0~DB7 ports of the integrated circuit U8 are respectively connected to the P1.0~P1.7 ports of the integrated circuit U12.

[0058] like Image 6 As shown in (c), the CAN bus circuit of this embodiment is composed of integrated circuits U9 to U11, resistors R17 to R25, capacitors C9 to C13, diode D1 and diode D2. The model of integrated circuit U9 is SJA1000. The model of circuit U10 is 6N137, and the model of integrated circuit U11 is 82C250. AD0~AD7 of IC U9 are connected to P2.0~P2.7 of IC U12 respectively, ALE port of IC U9 is connected to ALE port of IC U12, The ports are respectively connected to P0.6, P3.7, P3.6, Port, the VSS1~VSS3 ports of the integrated circuit U9 are grounded, the MODE, VDD1~VDD3 ports of the integrated circuit U9 are connected together and connected to one end of the capacitor C9, and the TX0 port of the integrated circuit U9 is connected to the VF (+) of the integrated circuit U10A through the resistor R17 ) port, the RX0 port of the integrated circuit U9 is connected to the VO port of the integrated circuit U10B and is connected to the positive pole of the 5V power supply through the resistor R18, the RX1 port of the integrated circuit U9 is connected to the positive pole of the 5V power supply through the resistor R19, and is connected to the positive pole of the 5V power supply through the resistor R20, and the capacitor C9 One end is connected to R18, R19, the other end is grounded and connected to one end of R20, the VF (-) of the integrated circuit U10A is connected to the positive pole of the 5V power supply, the GND is grounded and connected to one end of the capacitor C10, the VCC and VE of U10A are connected to the positive pole of the 5V power supply, and the VO of U10A The VF(+) port of U10B is connected to RXD through resistor R22, the VF(-) port is connected to the positive electrode of 5V power supply, the VO port of U10B is connected to the RX0 port of U10, and the VO port of U10B is connected to the RX0 port of U10. VCC and VE are connected to the positive pole of the 5V power supply, and GND is grounded.

[0059] like Image 6 As shown in (d), the control circuit of this embodiment is composed of an integrated circuit U12, a resistor R26, a resistor R27, capacitors C14 to C16, a crystal oscillator Y1, and a button S1. The model of the integrated circuit U12 is STC89C52. The resistor RST port of the integrated circuit U12 is connected to the capacitor C16 and the resistor R26 and is connected to the ground through the resistor R27, the XTAL1 and XTAL2 ports are connected to the capacitor C14 and the capacitor C15 and the oscillator circuit connected to the crystal oscillator Y1, the power supply terminal is connected to the power supply, the ground terminal is grounded, and the capacitor C16 The other end of the resistor R26 is connected to the positive pole of the 5V power supply, and the other end of the resistor R26 is connected to the positive pole of the 5V power supply through the button S1. The VCC of the integrated circuit U12 is connected to the positive pole of the 5V power supply, and the VSS is grounded.

[0060] At the same time, an underground noise leak detection device and a leak detection method are also disclosed. The acoustic signal passes through various formation media and reaches the acoustic wave receiving transducer 1, and then the acoustic wave receiving transducer 1 will receive the acoustic signal. -Electrical conversion, since the obtained electrical signal is a weak signal, a series of adjustments must be made to the electrical signal through the electronic bin 2, including pre-processing, controllable gain amplification, voltage amplification, A/D conversion, and then The electrical signal is sent to the CAN bus to realize the data transmission between the downhole and the uphole, and the logging data received by the downhole acoustic wave receiving transducer is transmitted to the surface, which is analyzed and processed by the uphole equipment, and the transformers T1~T4 are controlled by the control circuit. It works at different times to realize the time-division of the acoustic wave receiving transducer in four directions of the south, east, west and northwest to obtain sound signals, and transmit the four-way signals in four directions received by the downhole acoustic wave receiving transducer to the ground system, and analyze and compare through the ground system. For 4-channel signals, if the amplitude of one of the signals changes by 3 to 10dB compared to the other 3-channel signals, it is judged that there is leakage. If the amplitude of the four-channel signal changes less than 3dB, it is judged that there is no leakage.

[0061] The control circuit module is the core of the whole electronic warehouse 2 part of the circuit, controls the working state of each integrated circuit, and at the same time realizes the time-sharing work of the acoustic wave receiving transducer 1 in the four directions of the south, east, and northwest by controlling the change of the connection mode of the transformers T1~T4. , when the transformer T1 is gated through the control circuit, the directional transducer will form a directivity in the north direction; when the transformer T2 is gated through the control circuit, the directional transducer will form a directivity in the west direction ; When the transformer T3 is gated through the control circuit, the directivity transducer will form a directivity in the south direction; when the transformer T4 is gated through the control circuit, the directivity transducer will form a directivity in the east direction ; Thus, the logging data in four directions of southeast, northwest and northwest are transmitted to the ground system by time-sharing, so as to complete the whole testing process.

[0062] The acoustic wave receiving transducer judges the geological characteristics of the rock formation and the distribution of oil in the well by receiving the acoustic signal from the outside world, and judges whether there is leakage by receiving the acoustic signal generated by the friction of water, natural gas, oil and cement.