CN110085972B - Antenna transceiving circuit of while-drilling azimuth electromagnetic wave resistivity logging instrument - Google Patents
Antenna transceiving circuit of while-drilling azimuth electromagnetic wave resistivity logging instrument Download PDFInfo
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- 238000005553 drilling Methods 0.000 title claims abstract description 27
- 239000003990 capacitor Substances 0.000 claims abstract description 58
- 230000003750 conditioning effect Effects 0.000 claims abstract description 13
- 238000001514 detection method Methods 0.000 description 10
- 238000012360 testing method Methods 0.000 description 5
- 230000015572 biosynthetic process Effects 0.000 description 4
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- 230000007547 defect Effects 0.000 description 2
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- 235000009508 confectionery Nutrition 0.000 description 1
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- 230000002500 effect on skin Effects 0.000 description 1
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B49/00—Testing the nature of borehole walls; Formation testing; Methods or apparatus for obtaining samples of soil or well fluids, specially adapted to earth drilling or wells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/12—Supports; Mounting means
- H01Q1/22—Supports; Mounting means by structural association with other equipment or articles
- H01Q1/225—Supports; Mounting means by structural association with other equipment or articles used in level-measurement devices, e.g. for level gauge measurement
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q1/00—Details of, or arrangements associated with, antennas
- H01Q1/36—Structural form of radiating elements, e.g. cone, spiral, umbrella; Particular materials used therewith
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/0006—Particular feeding systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q21/00—Antenna arrays or systems
- H01Q21/28—Combinations of substantially independent non-interacting antenna units or systems
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/10—Resonant antennas
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/20—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements characterised by the operating wavebands
- H01Q5/28—Arrangements for establishing polarisation or beam width over two or more different wavebands
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/30—Arrangements for providing operation on different wavebands
- H01Q5/307—Individual or coupled radiating elements, each element being fed in an unspecified way
- H01Q5/314—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors
- H01Q5/335—Individual or coupled radiating elements, each element being fed in an unspecified way using frequency dependent circuits or components, e.g. trap circuits or capacitors at the feed, e.g. for impedance matching
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q5/00—Arrangements for simultaneous operation of antennas on two or more different wavebands, e.g. dual-band or multi-band arrangements
- H01Q5/50—Feeding or matching arrangements for broad-band or multi-band operation
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01Q—ANTENNAS, i.e. RADIO AERIALS
- H01Q7/00—Loop antennas with a substantially uniform current distribution around the loop and having a directional radiation pattern in a plane perpendicular to the plane of the loop
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- Engineering & Computer Science (AREA)
- Geology (AREA)
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Abstract
The invention discloses an antenna transceiver circuit of a logging-while-drilling azimuth electromagnetic wave resistivity logging instrument, which comprises a receiving unit and a transmitting unit, wherein the receiving unit comprises a receiving antenna, a conditioning circuit and a first adjusting capacitor CadA first adjusting resistor RadAnd a plurality of first resonant matching circuits connected in parallel with each other and having a first adjusting capacitor CadThe first end of the receiving antenna is connected in series with the first end of the first resonant matching circuit; the transmitting unit comprises a transmitting antenna, a transmitting circuit and a second adjusting capacitor Cad1A second adjusting resistor Rad1And a plurality of second resonant matching circuits, second adjusting capacitors Cad1The first end of the transmitting antenna is connected in series with the first end of the second resonant matching circuit; the first resonant matching circuit comprises a resonant inductor and a resonant capacitor which are sequentially connected in series, and the second resonant matching circuit has the same circuit structure as the first resonant matching circuit. The invention can improve the utilization rate of the antenna, is easy to debug and maintain and has simpler circuit structure.
Description
Technical Field
The invention relates to a logging-while-drilling azimuth electromagnetic wave resistivity logging instrument, in particular to an antenna transceiving circuit of the logging-while-drilling azimuth electromagnetic wave resistivity logging instrument.
Background
The orientation-while-drilling electromagnetic wave resistivity logging instrument can detect the orientation and distance information of a stratum interface relative to a borehole in real time, is used for precise geological guidance, prevents a drill bit from drilling a reservoir stratum, and plays an important role in drilling horizontal wells and highly-deviated wells. Electromagnetic wave resistivity logging instruments while drilling are respectively developed by various logging companies at home and abroad, in 2005, the first generation of azimuth resistivity logging instruments while drilling is released by the schlumberger company, and formation azimuth resistivity measurement is realized; in 2006, baker hous introduced an while-drilling azimuthal resistivity tool; in 2007, Haributton corporation introduced an electromagnetic wave resistivity logging instrument for azimuth depth detection while drilling, and provided resistivity information of 32 sectors; in 2014, China great wall drilling engineering Limited company firstly introduced a domestic directional electromagnetic wave resistivity logging instrument while drilling; in 2015, 1 set of logging tools for compensating propagation resistivity by electromagnetic wave array while drilling was provided by midsea oilfield service company limited. The azimuth electromagnetic wave resistivity can be realized only by adding an inclination angle to a receiving coil or transversely placing the receiving coil on the basis of the traditional while-drilling electromagnetic wave resistivity, so that antenna receiving and transmitting matching circuits are basically consistent, the while-drilling electromagnetic wave resistivity logging instrument has different formation detection depths and formation interface detection resolutions under different transmitting frequencies, the traditional method is that one antenna is matched with one frequency, the newly improved method is that one antenna is simultaneously matched with 2 frequencies to improve the utilization rate of the antenna, the two frequencies are usually selected to be 400kHz and 2MHz double-frequency resonance matching, and the existing double-frequency resonance matching is very difficult in parameter selection and is an important technical difficulty.
In the prior art, under the condition of different emission frequencies, the stratum detection depth and the stratum interface detection resolution of azimuth electromagnetic waves are different, and the lower the frequency is, the deeper the detection depth is, but the lower the resolution of the stratum interface detection is; the higher the frequency, the shallower the depth of detection, but the higher the resolution of the formation boundary detection. In order to combine the advantages and disadvantages of high and low frequencies, the number of transmitting and receiving antennas of the instrument is limited, and two frequencies of 400kHz and 2MHz are generally selected. The conventional method is that one antenna matches one frequency, the utilization rate of the antenna is very low, and a latest improved antenna circuit please refer to fig. 1, which realizes dual-frequency resonant matching that one antenna matches two frequencies, and improves the utilization rate of the antenna, but still has the following defects:
first, the matching circuit includes a transformer and a tuning inductor, and the primary inductance, the tuning inductor, and the antenna inductance of the transformer have a great influence on the matching effect. The design of the transformer, the tuning inductor and the antenna needs to strictly control the inductance parameters, the magnetic circuit of the transformer is usually closed, and the primary and secondary inductors are greatly influenced by temperature and transmitting power to cause the drift of a resonance point;
secondly, the double-frequency resonance matching comprises an antenna tuning capacitor and two matching tuning capacitors, wherein the matching tuning capacitors are mutually coupled with a tuning inductor and a transformer primary coil inductor to jointly determine the resonance frequency, so that the requirement on the professional of a technician is high, the circuit needs to be careful during debugging, and the debugging difficulty is high;
in addition, the dual-frequency resonant matching circuit can only realize the matching of two frequency points, cannot realize the matching of more frequency points by one transmitting-receiving antenna, and has low utilization rate of the antenna.
Disclosure of Invention
The technical problem to be solved by the invention is to provide an antenna transceiver circuit which is used for a logging-while-drilling azimuth electromagnetic wave resistivity logging instrument, can improve the utilization rate of an antenna, is easy to debug and maintain and has a simpler circuit structure, aiming at the defects of the prior art.
In order to solve the technical problems, the invention adopts the following technical scheme.
An antenna transceiver circuit of a logging-while-drilling azimuth electromagnetic wave resistivity logging instrument comprises a receiving unit and a transmitting unit, wherein: the receiving unit comprises a receiving antenna, a conditioning circuit and a first adjusting capacitor CadA first adjusting resistor RadAnd a plurality of first resonant matching circuits connected in parallel with each other, the first adjusting capacitor CadA first end of the receiving antenna and a first end of the first resonant matching circuit are connected in series, a second end of the receiving antenna and a second end of the first resonant matching circuit are respectively connected to the conditioning circuit, and the first adjustmentResistance RadA second terminal connected between the second terminal of the receiving antenna and the second terminal of the first resonant matching circuit; the transmitting unit comprises a transmitting antenna, a transmitting circuit and a second adjusting capacitor Cad1A second adjusting resistor Rad1And a plurality of second resonant matching circuits connected in parallel with each other, the second adjustment capacitor Cad1A second resonant matching circuit connected between the first end of the transmitting antenna and the first end of the second resonant matching circuit, a second end of the second resonant matching circuit connected to the transmitting circuit, and a second adjusting resistor Rad1The second end of the transmitting antenna is connected in series with the transmitting circuit; the first resonant matching circuit comprises a resonant inductor and a resonant capacitor which are sequentially connected in series, and the second resonant matching circuit has the same circuit structure as the first resonant matching circuit.
Preferably, in the first resonant matching circuit, a first end of the resonant inductor is used as a first end of the first resonant matching circuit, a second end of the resonant inductor is connected to a first end of the resonant capacitor, and a second end of the resonant capacitor is used as a second end of the first resonant matching circuit.
Preferably, the inductance of the resonant inductor in the first resonant matching circuit is greater than the inductance of the receiving antenna.
Preferably, the capacitance value of the resonant capacitor in the first resonant matching circuit is smaller than the first adjusting capacitor CadThe capacitance value of (2).
Preferably, the inductance of the resonant inductance in the second resonant matching circuit is greater than the inductance of the transmitting antenna.
Preferably, the capacitance value of the resonant capacitor in the second resonant matching circuit is smaller than the second adjusting capacitor Cad1The capacitance value of (2).
Preferably, the conditioning circuit is sealed to isolate the receiving antenna from the conditioning circuit.
Preferably, the transmitting circuit is sealed to isolate the transmitting antenna from the transmitting circuit.
The invention discloses a multi-frequency resonance matching method, which is characterized in that a plurality of resonance matching circuits which are connected in parallel are utilized to form multi-frequency resonance matching, each resonance matching circuit is formed by connecting only one resonance inductor and one resonance capacitor in series, and then an adjusting capacitor and an adjusting resistor are combined to respectively form a transmitting unit and a receiving unit, wherein the receiving antenna and the transmitting antenna determine the highest transceiving frequency, and a first adjusting capacitor CadAnd a second adjusting capacitor Cad1The first adjusting resistor R determines the low-frequency suppression capabilityadAnd a second adjusting resistor Rad1Determines the frequency-selective characteristics of the system. Based on the circuit principle, the structure of the antenna transceiving circuit is simpler, in practical application, each resonant matching circuit determines one resonant frequency point, each resonant frequency point is mutually independent, and the antenna transceiving circuit can be ensured to normally work as long as the plurality of resonant frequency points are ensured to be separated by enough, so that the antenna utilization rate is greatly improved. In addition, the antenna transceiver circuit of the invention does not need a transformer, so that the circuit structure is simpler, and the application requirements are better met.
Drawings
FIG. 1 is a schematic diagram of a dual-frequency resonant matching circuit in the prior art;
fig. 2 is a schematic circuit diagram of a receiving unit in the antenna transceiver circuit according to the present invention;
fig. 3 is a schematic circuit diagram of a transmitting unit in the antenna transceiver circuit according to the present invention;
FIG. 4 is a graph showing the effect of the test of the receiving characteristics of the tri-band resonant matching circuit in the preferred embodiment of the present invention;
fig. 5 is a graph showing the effect of the test of the emission characteristic of the tri-band resonant matching circuit in the preferred embodiment of the present invention.
Detailed Description
The invention is described in more detail below with reference to the figures and examples.
The invention discloses an antenna transceiving circuit of a logging-while-drilling azimuth electromagnetic wave resistivity logging instrument, which is shown by combining a figure 2 and a figure 3 and comprises a receiving unit and a transmitting unit, wherein:
the receiving unit comprises a receiving antenna 10, a conditioning circuit 11 and a first adjusting capacitor CadA first adjusting resistor RadAnd a plurality of first resonant matching circuits 12, the plurality of first resonant matching circuits 12 being connected in parallel with each other, the first adjustment capacitor CadA first end of the receiving antenna 10 and a first end of the first resonant matching circuit 12 are connected in series, a second end of the receiving antenna 10 and a second end of the first resonant matching circuit 12 are respectively connected to the conditioning circuit 11, and the first adjusting resistor RadIs connected between the second end of the receiving antenna 10 and the second end of the first resonant matching circuit 12;
the transmitting unit comprises a transmitting antenna 20, a transmitting circuit 21 and a second adjusting capacitor Cad1A second adjusting resistor Rad1And a plurality of second resonant matching circuits 22, the plurality of second resonant matching circuits 22 being connected in parallel with each other, the second adjustment capacitor Cad1A first end of the transmitting antenna 20 and a first end of the second resonant matching circuit 22 are connected in series, a second end of the second resonant matching circuit 22 is connected to the transmitting circuit 21, and the second adjusting resistor Rad1Is connected in series between the second end of the transmitting antenna 20 and the transmitting circuit 21;
the first resonant matching circuit 12 includes a resonant inductor and a resonant capacitor connected in series in sequence, and the second resonant matching circuit 22 has the same circuit structure as the first resonant matching circuit 12.
In the above circuit, a plurality of resonance matching circuits connected in parallel are used to form multi-frequency resonance matching, each resonance matching circuit is formed by connecting only one resonance inductor and one resonance capacitor in series, and then combining with an adjusting capacitor and an adjusting resistor to respectively form a transmitting unit and a receiving unit, wherein the receiving antenna 10 and the transmitting antenna 20 determine the highest transceiving frequency, and a first adjusting capacitor CadAnd a second adjusting capacitor Cad1The first adjusting resistor R determines the low-frequency suppression capabilityadAnd a second adjusting resistor Rad1Determines the frequency-selective characteristics of the system. Based on the circuit principle, the antenna transmits and receivesThe structure of the circuit is simpler, in practical application, each resonance matching circuit determines one resonance frequency point, each resonance frequency point is mutually independent, and as long as enough intervals between a plurality of resonance frequency points are ensured, the normal work of the antenna transceiving circuit can be ensured, and the utilization rate of the antenna is greatly improved. In addition, the antenna transceiver circuit of the invention does not need a transformer, so that the circuit structure is simpler, and the application requirements are better met.
In this embodiment, the conditioning circuit 11 is sealed to isolate the receiving antenna 10 and the conditioning circuit 11 from each other. The transmitting circuit 21 is sealed to isolate the transmitting antenna 20 and the transmitting circuit 21 from each other.
Regarding the position relation and the connection relation of the resonant inductor and the resonant capacitor in the resonant matching circuit, in this embodiment, in the first resonant matching circuit 12, a first end of the resonant inductor is used as a first end of the first resonant matching circuit 12, a second end of the resonant inductor is connected to a first end of the resonant capacitor, and a second end of the resonant capacitor is used as a second end of the first resonant matching circuit 12.
In order to satisfy the resonance requirement, in the present embodiment, the inductance of the resonant inductor in the first resonant matching circuit 12 is greater than the inductance of the receiving antenna 10. The capacitance of the resonant capacitor in the first resonant matching circuit 12 is smaller than the first adjusting capacitor CadThe capacitance value of (2). Further, the inductance of the resonant inductor should be much larger than the inductance of the receiving antenna 10. The capacitance value of the resonance capacitor is far less than that of the first adjusting capacitor CadThe capacitance value of (2).
Similarly, the inductance of the resonant inductance in the second resonant matching circuit 22 is greater than the inductance of the transmitting antenna 20. The capacitance of the resonant capacitor in the second resonant matching circuit 22 is smaller than the second adjusting capacitor Cad1The capacitance value of (2). Wherein the inductance of the resonant inductor is much larger than the inductance of the transmitting antenna 20. The capacitance value of the resonance capacitor should be much smaller thanSecond adjusting capacitor Cad1The capacitance value of (2).
In the preferred embodiment of the present invention, taking three resonance points as an example, the three resonance points are respectively:
if three resonance frequency points are selected to be 100kHz, 500kHz and 2MHz respectively, the adjusting resistor is usually selected to be 10-50 omega, the adjusting capacitor is usually selected to be 100-500nF, and the antenna inductance is usually selected to be 1-5 uH. In practical application, the following requirements need to be satisfied: firstly, the interval between three resonance frequency points is large enough; secondly, the inductance of the resonant inductor is far larger than that of the antenna, and the capacitance of the resonant capacitor is far smaller than that of the adjusting capacitor; thirdly, the inductance of the antenna and the resistance of the adjusting resistor cannot be too large, otherwise, the high-frequency resonance frequency point cannot be normally obtained; in addition, the present embodiment can realize more resonance points by using various combinations of series-parallel resonance, so the present invention is not limited to the case of 3 resonance points; finally, the invention can transmit the antenna signal without distortion, further amplify the signal by the subsequent amplifying circuit, and also amplify by the coupling transformer, wherein, the coupling transformer requires the excitation inductance to be far larger than the resonance inductance.
The specific test process is as follows:
in the transmitting circuit, if the inductance of the antenna is 2uH, the adjusting capacitance is 150nF, and the adjusting resistance is 60 Ω, three resonant inductances L1 are set to 150uH, L2 is 15uH, L3 is 7.5uH, three resonant capacitances C1 is 17nF, C2 is 422pF, and C3 is 13.5nF, then the three frequency points are:
thus, the three frequency points set are set to 100kHz, 500kHz, and 2MHz, respectively.
As for the test result, please refer to fig. 4 for the relationship between the ratio of the received current and the received voltage, at the positions of the three frequency points 100kHz, 500kHz and 2MHz, the induced voltage of the antenna is transmitted to the inside of the system without amplitude distortion (0dB) and phase distortion (0 °), and other frequency points are suppressed and eliminated, so as to achieve three resonant frequency selection effects.
Similarly, based on the same parameters, the triple-frequency resonant matching can also be used as an emission matching, the inductance of the antenna is set to be 2uH, the adjustment capacitance is 150nF, the adjustment resistance (which plays a role in limiting current) is 10 Ω, three resonant inductors L1 are set to be 150uH, L2 to be 15uH, and L3 to be 7.5uH, three resonant capacitors C1 to 17nF, C2 to 422pF, and C3 to be 13.5nF are set, so that the three frequency points are still 100kHz, 500kHz, and 2mhz, and the emission current can be obtained at the positions of the three resonant frequency points to satisfy simple ohm laws, that is, at the positions of the three resonant frequency points, the emission current is equal to the emission voltage divided by the adjustment resistance.
As for the test result, please refer to fig. 5, wherein the adjusting resistance is 10 Ω, so the transmitting current is 10 times smaller than the transmitting voltage, i.e. the relationship of-20 dB in the figure, and the phase is zero at the resonant frequency point, thereby showing that the resonant matching and the position of the electric wire system at the resonant frequency point do not have any obstruction to the current flowing.
Based on the principle, the antenna transceiving circuit disclosed by the invention realizes the combination of one transceiving coil and a plurality of resonance points, greatly improves the utilization rate of the transceiving coil, is beneficial to providing richer stratum information for a logging instrument, and can find the stratum interface of a reservoir earlier than the existing logging instrument by the detection depth of the multi-resonance matching circuit being 2 times or even more than that of the original double-resonance matching circuit according to the skin effect of electromagnetic waves, thereby effectively avoiding perforating the reservoir, providing more timely stratum information for geosteering drilling work, further improving the drilling rate of drilling and effectively finding the position of an oil gas sweet spot.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the technical scope of the present invention should be included in the scope of the present invention.
Claims (4)
1. An antenna transceiver circuit of an orientation-while-drilling electromagnetic wave resistivity logging instrument is characterized by comprising a receiving unit and a transmitting unit, wherein:
the receiving unit comprises a receiving antenna (10), a conditioning circuit (11) and a first adjusting capacitor CadA first adjusting resistor RadAnd a plurality of first resonant matching circuits (12), the plurality of first resonant matching circuits (12) being connected in parallel with each other, the first adjustment capacitor CadA first end of the receiving antenna (10) and a first end of the first resonant matching circuit (12) are connected in series, a second end of the receiving antenna (10) and a second end of the first resonant matching circuit (12) are respectively connected to the conditioning circuit (11), and the first adjusting resistor RadIs connected between the second end of the receiving antenna (10) and the second end of the first resonant matching circuit (12);
the transmitting unit comprises a transmitting antenna (20), a transmitting circuit (21) and a second adjusting capacitor Cad1A second adjusting resistor Rad1And a plurality of second resonant matching circuits (22), the plurality of second resonant matching circuits (22) being connected in parallel with each other, the second adjustment capacitor Cad1A first end of the transmitting antenna (20) and a first end of the second resonant matching circuit (22) in series, a second end of the second resonant matching circuit (22) being connected to the transmitting circuit (21), and the second adjusting resistor Rad1Is connected in series between the second end of the transmitting antenna (20) and the transmitting circuit (21);
the first resonant matching circuit (12) comprises a resonant inductor and a resonant capacitor which are sequentially connected in series, and the second resonant matching circuit (22) and the first resonant matching circuit (12) have the same circuit structure;
the inductance of the resonant inductance in the first resonant matching circuit (12) is greater than the inductance of the receiving antenna (10); the capacitance value of the resonant capacitor in the first resonant matching circuit (12) is smaller than the first adjusting capacitor CadThe capacitance value of (a);
the inductance of the resonant inductance in the second resonant matching circuit (22) is greater than the inductance of the transmitting antenna (20); the capacitance value of the resonant capacitor in the second resonant matching circuit (22) is smaller than the second adjusting capacitor Cad1The capacitance value of (2).
2. The antenna transceiving circuit of the while-drilling azimuthal electromagnetic wave resistivity logging tool as recited in claim 1, wherein in the first resonant matching circuit (12), a first end of the resonant inductor serves as a first end of the first resonant matching circuit (12), a second end of the resonant inductor is connected with a first end of the resonant capacitor, and a second end of the resonant capacitor serves as a second end of the first resonant matching circuit (12).
3. The antenna transceiver circuit of the while-drilling azimuthal electromagnetic wave resistivity logging tool as recited in claim 1, wherein the conditioning circuit (11) is sealed to isolate the receiving antenna (10) and the conditioning circuit (11).
4. The antenna transceiver circuit of the while-drilling azimuthal electromagnetic wave resistivity tool according to claim 1, wherein the transmitting circuit (21) is sealed to isolate the transmitting antenna (20) and the transmitting circuit (21) from each other.
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| CN201910371313.0A CN110085972B (en) | 2019-05-06 | 2019-05-06 | Antenna transceiving circuit of while-drilling azimuth electromagnetic wave resistivity logging instrument |
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| CN201910371313.0A CN110085972B (en) | 2019-05-06 | 2019-05-06 | Antenna transceiving circuit of while-drilling azimuth electromagnetic wave resistivity logging instrument |
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| CN110085972B true CN110085972B (en) | 2020-07-24 |
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| CN113283259B (en) * | 2021-07-19 | 2021-10-08 | 江西博星数码科技有限公司 | RFID-based multi-tag radio frequency identification system and method |
| CN114737961B (en) * | 2022-04-15 | 2023-02-28 | 中国科学院地质与地球物理研究所 | Device and method for measuring orientation electromagnetic wave resistivity while drilling |
| CN115021702A (en) * | 2022-06-01 | 2022-09-06 | 吉林大学 | Superaudio electromagnetic emission circuit |
| CN117335154B (en) * | 2023-09-28 | 2024-05-03 | 中国科学院地质与地球物理研究所 | Multi-frequency resonance device and method for electromagnetic wave antenna |
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| CN205117337U (en) * | 2015-10-30 | 2016-03-30 | 武汉海阔科技有限公司 | Multi -frequency resonance circuit |
| CN107152275A (en) * | 2016-03-02 | 2017-09-12 | 中国石油化工股份有限公司 | Impedance matching circuit and with bore electromagnetic resistivity measuring instrument |
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| JPH1065489A (en) * | 1996-08-13 | 1998-03-06 | Hitachi Ltd | Filter using surface acoustic wave element and antenna branching filter using the filter |
| US8514015B2 (en) * | 2008-12-10 | 2013-08-20 | Qualcomm, Incorporated | Amplifier with programmable off voltage |
| CN105680886A (en) * | 2015-06-24 | 2016-06-15 | 北京恒泰万博石油科技有限公司 | Dual-frequency transmission tuning system and method suitable for electromagnetic wave resistivity measurement while drilling |
| CN107453020B (en) * | 2016-05-30 | 2019-10-29 | 中国石油化工股份有限公司 | A kind of matching reception device with brill electromagnetic wave receiving antenna |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN205117337U (en) * | 2015-10-30 | 2016-03-30 | 武汉海阔科技有限公司 | Multi -frequency resonance circuit |
| CN107152275A (en) * | 2016-03-02 | 2017-09-12 | 中国石油化工股份有限公司 | Impedance matching circuit and with bore electromagnetic resistivity measuring instrument |
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