Azimuth electromagnetic wave resistivity antenna equivalent device and circuit test system

Abstract

The utility model provides an azimuth electromagnetic wave resistivity antenna equivalent device and a circuit test system, and relates to the technical field of oil drilling, the device comprises an antenna interface, an attenuator and a power divider, the antenna interface is used for connecting an azimuth electromagnetic wave resistivity transmitting antenna and a receiving antenna; the attenuator is used for simulating antenna impedance of an electromagnetic wave resistivity instrument in a real direction and attenuating a transmitting signal transmitted by the transmitting antenna to obtain an attenuated signal; the power divider is connected with the attenuator and is used for distributing the attenuation signals into multiple paths of attenuation signals. According to the utility model, the structure is simple, the required cost is low, the real antenna load condition can be simulated without large-scale improvement on the existing azimuth electromagnetic wave resistivity test system, the azimuth electromagnetic wave resistivity circuit system is tested, and the defects of the circuit system can be checked as soon as possible.

Description

Technical Field

[0001] The utility model relates to the technical field of oil drilling, in particular to an azimuth electromagnetic wave resistivity antenna equivalent device and a circuit testing system. Background Art

[0002] Azimuth electromagnetic wave resistivity logging while drilling can predict resistivity interfaces in formations and guide real-time adjustments to drilling trajectories to drill into reservoir sweet spots. It is increasingly used in the exploration and development of highly deviated wells and horizontal wells. In the development of azimuth electromagnetic wave resistivity circuits, circuit system testing is a necessary step. Since the circuit system and mechanical structure are usually developed at the same time, and due to the lack of actual mechanical structures, the circuit system is powered on and tested without antenna loads or simple resistance loads, and it is often easy to pass the test. However, due to the lack of test conditions, the circuit system may have defects. When actual tests are carried out after the mechanical structure development is completed, the defects of the circuit system will be exposed, dragging down the development progress of the instrument.

[0003] Therefore, in view of the above problems existing in the prior art, the utility model provides an azimuth electromagnetic wave resistivity antenna equivalent device and a circuit testing system. Utility Model Content

[0004] In order to solve the problems of the above-mentioned prior art, the purpose of the utility model is to provide a device that can simulate a resistivity antenna in the process of developing an electromagnetic wave resistivity circuit. The utility model provides an azimuth electromagnetic wave resistivity antenna equivalent device, and the device comprises: an antenna interface, an attenuator and a power divider, wherein the antenna interface is used to connect the azimuth electromagnetic wave resistivity transmitting antenna and the receiving antenna; the attenuator is used to simulate the antenna impedance of the real azimuth electromagnetic wave resistivity instrument and attenuate the transmitting signal emitted by the transmitting antenna to obtain an attenuated signal; the power divider is connected to the attenuator to distribute the attenuated signal into multi-path attenuated signals.

[0005] According to one embodiment of the utility model, the antenna interface includes: a transmitting antenna interface and a receiving antenna interface, wherein the transmitting antenna interface is connected to the transmitting antenna for receiving the transmitting signal; the receiving antenna interface is connected to the receiving antenna for transmitting the multi-path attenuated signal to the receiving antenna.

[0006] According to an embodiment of the utility model, the antenna interface uses an SMC small threaded radio frequency connector.

[0007] According to an embodiment of the utility model, the input end of the attenuator is connected to the transmitting antenna interface to simulate the antenna impedance of the real azimuth electromagnetic wave resistivity instrument and attenuate the transmitting signal by 40-60DB to obtain the attenuated signal.

[0008] According to an embodiment of the present utility model, the input end of the power divider is connected to the output end of the attenuator, and the output end is connected to the receiving antenna interface.

[0009] According to an embodiment of the present invention, the attenuator is an adjustable attenuator.

[0010] According to an embodiment of the present invention, the power divider is a four-way power divider.

[0011] According to an embodiment of the utility model, the device further comprises: a housing, which is used to internally house the attenuator and the power divider and externally house the antenna interface.

[0012] According to another aspect of the utility model, an azimuthal electromagnetic wave resistivity circuit testing system is also provided, and the system comprises the device as described in any one of the above items.

[0013] According to one embodiment of the utility model, the system further includes: a power supply circuit, a main control circuit, a transmitting circuit, and a receiving circuit, wherein the power supply circuit is used to provide power for the main control circuit, the transmitting circuit, and the receiving circuit; the main control circuit is used to control the transmitting circuit to transmit the transmitting signal through the transmitting antenna, control the receiving circuit to receive the multi-path attenuated signal through the receiving antenna, and perform signal digital processing on the multi-path attenuated signal.

[0014] The utility model provides an azimuth electromagnetic wave resistivity antenna equivalent device and a circuit testing system, which have the following advantages over the prior art:

[0015] 1) The azimuth electromagnetic wave resistivity antenna equivalent device provided by the utility model can simulate the resistivity antenna in the process of developing the azimuth electromagnetic wave resistivity circuit, improve the authenticity of the test, and enhance the efficiency and accuracy of the research and development.

[0016] 2) The azimuth electromagnetic wave resistivity circuit testing system provided by the utility model can realize the testing of the azimuth electromagnetic wave resistivity circuit system in the research and development process without the actual mechanical structure, thereby ensuring the research and development progress.

[0017] 3) The azimuth electromagnetic wave resistivity antenna equivalent device and circuit testing system provided by the utility model have simple structures and require low costs. They do not require large-scale improvements to the existing azimuth electromagnetic wave resistivity testing system and can simulate actual antenna load conditions and test the azimuth electromagnetic wave resistivity circuit system, thereby detecting defects in the circuit system as early as possible.

[0018] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures specifically pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 The azimuthal electromagnetic wave resistivity circuit testing system in the prior art is shown;

[0021] Figure 2 A structural block diagram of an azimuth electromagnetic wave resistivity antenna equivalent device according to an embodiment of the utility model is shown;

[0022] Figure 3 The structure block diagram of an azimuthal electromagnetic wave resistivity circuit testing system according to an embodiment of the utility model is shown.

[0023] The meanings of the various reference numerals in the accompanying drawings are as follows: 10 - antenna equivalent device; 11 - transmitting antenna interface; 12 - attenuator; 13 - power divider; 14 - receiving antenna interface; 15 - housing; 21 - power supply circuit; 22 - main control circuit; 23 - transmitting circuit; 24 - receiving circuit. DETAILED DESCRIPTION

[0024] The following will describe the implementation methods of the present invention in detail with reference to the accompanying drawings and embodiments, so that the implementation process of how the present invention applies technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly. It should be noted that as long as there is no conflict, the various embodiments of the present invention and the various features in the embodiments can be combined with each other, and the technical solutions formed are all within the protection scope of the present invention.

[0025] Meanwhile, in the following description, many specific details are set forth for the purpose of explanation to provide a thorough understanding of the embodiments of the utility model. However, it is obvious to those skilled in the art that the utility model can be implemented without the specific details or the specific manner described herein.

[0026] The utility model does not improve the control method. Each device of the utility model adopts the existing control method, or each device itself can realize this function.

[0027] Azimuthal electromagnetic resistivity logging while drilling can predict resistivity interfaces in formations and guide real-time adjustment of drilling trajectories to drill into reservoir sweet spots. It is increasingly used in the exploration and development of highly deviated wells and horizontal wells.

[0028] In the process of developing azimuth electromagnetic wave resistivity circuit, circuit system testing is a necessary step. Since the circuit system and mechanical structure are usually developed at the same time, due to the lack of actual mechanical structure, the circuit system is powered on without antenna load or simple resistance load (such as Figure 1 ), often pass the test easily.

[0029] However, due to the lack of testing conditions, the circuit system may have defects. When actual tests are carried out after the mechanical structure is developed, the defects of the circuit system will be exposed, which will slow down the development progress of the instrument.

[0030] In view of the defects in the prior art, one of the technical problems to be solved by the present invention is to provide a device capable of simulating a resistivity antenna during the development of an electromagnetic wave resistivity circuit.

[0031] Figure 2 The structure block diagram of an azimuth electromagnetic wave resistivity antenna equivalent device according to an embodiment of the utility model is shown.

[0032] An azimuth electromagnetic wave resistivity antenna equivalent device 10 comprises: an antenna interface, an attenuator 12 and a power divider 13, wherein the antenna interface is used to connect the azimuth electromagnetic wave resistivity transmitting antenna and the receiving antenna; the attenuator 12 is used to simulate the antenna impedance of the real azimuth electromagnetic wave resistivity instrument and attenuate the transmitting signal emitted by the transmitting antenna to obtain an attenuated signal; the power divider 13 is connected to the attenuator 12 and is used to distribute the attenuated signal into multi-path attenuated signals.

[0033] In one embodiment, Figure 2 As shown, the antenna interface includes: a transmitting antenna interface 11 and a receiving antenna interface 14, wherein the transmitting antenna interface 11 is connected to the transmitting antenna for receiving the transmitting signal; the receiving antenna interface 14 is connected to the receiving antenna for transmitting the multi-path attenuated signal to the receiving antenna.

[0034] Furthermore, the antenna interface uses an SMC small threaded RF connector. Specifically, the RF coaxial connector is mounted on a cable or installed on an instrument as a component for electrically connecting or separating a transmission line.

[0035] It should be noted that, in addition to the SMC small threaded RF connector, other types of RF connectors can be selected according to actual conditions, and the present utility model does not limit this.

[0036] In one embodiment, Figure 2 As shown, the input end of the attenuator 12 is connected to the transmitting antenna interface 11, which is used to simulate the antenna impedance of the real azimuth electromagnetic wave resistivity instrument and attenuate the transmitting signal by 40-60DB to obtain an attenuated signal.

[0037] Furthermore, the attenuator is an adjustable attenuator. Specifically, the adjustable attenuator includes a switch attenuator with discrete attenuation levels and a continuously variable attenuator with an analog adjustment function. These two types of attenuators can be designed to be electrically or mechanically controlled. Some attenuators can be program-controlled by digital signals or even existing software. In practical applications, a suitable attenuator 12 can be selected according to actual conditions, and the utility model does not limit this.

[0038] In one embodiment, Figure 2 As shown, the input end of the power divider 13 is connected to the output end of the attenuator 12 , and the output end is connected to the receiving antenna interface 14 .

[0039] Furthermore, the power divider is a four-way power divider. Specifically, a power divider (power divider for short) is a device that divides one input signal energy into two or more outputs of equal or unequal energy, usually an equal distribution of energy, and is divided into two power divisions, three power divisions, four power divisions, six power divisions, eight power divisions, twelve power divisions, etc. according to the output. It can also be used as a combiner in reverse. Antennas and mobile communications that are often used in the field of radio frequency microwaves, in actual applications, a suitable power divider 13 can be selected according to actual conditions, and the utility model does not limit this.

[0040] In one embodiment, Figure 2 As shown, the azimuth electromagnetic wave resistivity antenna equivalent device 10 further includes: a housing 15, which is used for the built-in attenuator 12 and the power divider 13, and an external antenna interface.

[0041] In summary, in order to solve the existing technology (such as Figure 1 As shown in the figure, the utility model proposes an equivalent device 10 for azimuth electromagnetic wave resistivity antenna, such as Figure 2 As shown, it includes an external transmitting antenna SMC connector 11, a built-in adjustable attenuator 12 and a power divider 13, and an external receiving antenna SMC connector 14. In the process of developing azimuth electromagnetic wave resistivity circuits, it is possible to simulate resistivity antennas, improve the authenticity of the test, and enhance the efficiency and accuracy of research and development.

[0042] Figure 3 The structure block diagram of an azimuthal electromagnetic wave resistivity circuit testing system according to an embodiment of the utility model is shown.

[0043] According to another aspect of the utility model, an azimuth electromagnetic wave resistivity circuit testing system is provided, which comprises an azimuth electromagnetic wave resistivity antenna equivalent device 10 .

[0044] In one embodiment, Figure 3 As shown, an azimuth electromagnetic wave resistivity circuit testing system also includes: a power supply circuit 21, a main control circuit 22, a transmitting circuit 23, and a receiving circuit 24, wherein the power supply circuit 21 is used to provide power to the main control circuit 22, the transmitting circuit 23 and the receiving circuit 24; the main control circuit 22 is used to control the transmitting circuit 23 to transmit a transmitting signal through a transmitting antenna, control the receiving circuit 24 to receive a multi-path attenuated signal through a receiving antenna, and also perform signal digitization processing on the multi-path attenuated signal.

[0045] Specifically, the power supply circuit 21 is responsible for providing power to other circuits, the main control circuit 22 is responsible for controlling the (5-way) transmitting circuit 23 to transmit signals through the azimuth electromagnetic wave resistivity antenna equivalent device 10, controlling the receiving circuit 24 to receive signals, and the main control circuit 22 performs signal digital processing.

[0046] In one embodiment, the schematic diagram of the azimuth electromagnetic wave resistivity antenna equivalent device 10 is as shown in Figure 2 As shown, it includes an external transmitting antenna SMC connector 11 (for example, Figure 2 The 5-way external transmitting antenna SMC connector 11 shown: T1, T2, T3, T4, T5) is used to connect the azimuth electromagnetic wave resistivity transmitting antenna to receive the transmitting signal from the transmitting circuit 23 (for example, Figure 2 The 5 transmission signals shown are: T1 signal, T2 signal, T3 signal, T4 signal, T5 signal), a network composed of a built-in adjustable attenuator 12 and a power divider 13, simulates the antenna impedance of the real azimuth electromagnetic wave resistivity instrument and attenuates the signal of the transmitting antenna by 40-60DB. The external receiving antenna SMC connector 14 (for example, Figure 2 The 4-way external receiving antenna SMC connector 14 (R1, R2, R3, R4) is used to connect the azimuth electromagnetic wave resistivity receiving antenna to transmit the attenuated multi-way signals (for example, Figure 2 The four attenuated signals shown: R1 signal, R2 signal, R3 signal, R4 signal) are transmitted to the receiving circuit 24 for processing.

[0047] In summary, in order to solve the existing technology (such as Figure 1 As shown in the figure, the utility model proposes an azimuth electromagnetic wave resistivity circuit testing system (as shown in the figure) Figure 3 As shown in the figure, it is possible to test the azimuth electromagnetic wave resistivity circuit system in the R&D process without actual mechanical structure, thus ensuring the progress of R&D.

[0048] In summary, the utility model provides an azimuth electromagnetic wave resistivity antenna equivalent device and a circuit testing system, which have the following advantages compared with the prior art:

[0049] 1) The azimuth electromagnetic wave resistivity antenna equivalent device provided by the utility model can simulate the resistivity antenna in the process of developing the azimuth electromagnetic wave resistivity circuit, improve the authenticity of the test, and enhance the efficiency and accuracy of the research and development.

[0050] 2) The azimuth electromagnetic wave resistivity circuit testing system provided by the utility model can realize the testing of the azimuth electromagnetic wave resistivity circuit system in the research and development process without the actual mechanical structure, thereby ensuring the research and development progress.

[0051] 3) The azimuth electromagnetic wave resistivity antenna equivalent device and circuit testing system provided by the utility model have simple structures and require low costs. They do not require large-scale improvements to the existing azimuth electromagnetic wave resistivity testing system and can simulate actual antenna load conditions and test the azimuth electromagnetic wave resistivity circuit system, thereby detecting defects in the circuit system as early as possible.

[0052] It should be understood that the embodiments disclosed in the present invention are not limited to the specific structures, processing steps or materials disclosed herein, but should be extended to equivalent substitutions of these features understood by ordinary technicians in the relevant field. It should also be understood that the terms used herein are only used for the purpose of describing specific embodiments and are not meant to be limiting.

[0053] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0054] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] Certain terms are used throughout this application document to indicate specific system components. As those skilled in the art will recognize, different names can usually be used to indicate the same components, so this application document is not intended to distinguish those components that are only different in name but not in function. In this application document, the terms "comprise", "include" and "have" are used in an open form, and therefore should be interpreted as meaning "including but not limited to...". In addition, the terms "substantially", "substantially" or "approximately" that may be used in this article relate to the tolerances of the corresponding terms accepted by the industry. The term "coupling" as may be used in this article includes direct coupling and indirect coupling via other components, elements, circuits, or modules, wherein for indirect coupling, the components, elements, circuits, or modules between them do not change the information of the signal but can adjust its current level, voltage level, and / or power level. Inferred coupling (for example, one of the elements is coupled to another element by inference) includes direct and indirect coupling between two elements in the same way as "coupling".

[0056] The phrases "one embodiment" or "embodiment" mentioned in the specification mean that a particular feature, structure or characteristic described in conjunction with the embodiment is included in at least one embodiment of the present invention. Therefore, the phrases "one embodiment" or "embodiment" appearing in various places throughout the specification do not necessarily refer to the same embodiment.

[0057] The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

[0058] Although the embodiments disclosed in the present invention are as above, the above contents are only embodiments adopted for facilitating the understanding of the present invention, and are not intended to limit the present invention. Any technician in the technical field to which the present invention belongs can make any modifications and changes in the form and details of the implementation without departing from the spirit and scope disclosed in the present invention, but the scope of patent protection of the present invention shall still be subject to the scope defined in the attached claims.

Claims

1. An azimuth electromagnetic wave resistivity antenna equivalent device, characterized in that: The device comprises: an antenna interface, an attenuator and a power divider, wherein the antenna interface is used to connect an azimuth electromagnetic wave resistivity transmitting antenna and a receiving antenna; the attenuator is used to simulate the antenna impedance of a real azimuth electromagnetic wave resistivity instrument and attenuate the transmitting signal emitted by the transmitting antenna to obtain an attenuated signal; the power divider is connected to the attenuator to distribute the attenuated signal into multi-path attenuated signals.

2. The azimuth electromagnetic wave resistivity antenna equivalent device according to claim 1, characterized in that: The antenna interface includes: a transmitting antenna interface and a receiving antenna interface, wherein the transmitting antenna interface is connected to the transmitting antenna for receiving the transmitting signal; the receiving antenna interface is connected to the receiving antenna for transmitting the multi-path attenuated signal to the receiving antenna.

3. The azimuth electromagnetic wave resistivity antenna equivalent device according to claim 1, characterized in that: The antenna interface uses an SMC small threaded radio frequency connector.

4. The azimuth electromagnetic wave resistivity antenna equivalent device according to claim 2, characterized in that: The input end of the attenuator is connected to the transmitting antenna interface, and is used to simulate the antenna impedance of the real azimuth electromagnetic wave resistivity instrument and attenuate the transmitting signal by 40-60DB to obtain the attenuated signal.

5. The azimuth electromagnetic wave resistivity antenna equivalent device according to claim 4, characterized in that: The input end of the power divider is connected to the output end of the attenuator, and the output end is connected to the receiving antenna interface.

6. The azimuth electromagnetic wave resistivity antenna equivalent device according to claim 4, characterized in that: The attenuator is an adjustable attenuator.

7. The azimuth electromagnetic wave resistivity antenna equivalent device according to claim 5, characterized in that: The power divider is a four-way power divider.

8. An azimuth electromagnetic wave resistivity antenna equivalent device according to any one of claims 1 to 7, characterized in that: The device further comprises: a shell, which is used to internally house the attenuator and the power divider and externally house the antenna interface.

9. An azimuthal electromagnetic wave resistivity circuit testing system, characterized in that: The system comprises the device according to any one of claims 1-8.

10. The azimuthal electromagnetic wave resistivity circuit testing system according to claim 9, characterized in that: The system also includes: a power supply circuit, a main control circuit, a transmitting circuit, and a receiving circuit, wherein the power supply circuit is used to provide power for the main control circuit, the transmitting circuit, and the receiving circuit; the main control circuit is used to control the transmitting circuit to transmit the transmitting signal through the transmitting antenna, control the receiving circuit to receive the multi-path attenuated signal through the receiving antenna, and perform signal digitization processing on the multi-path attenuated signal.

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