Electromagnetic wave transmitting device for detection while drilling

Abstract

The invention discloses a while-drilling detection electromagnetic wave transmitting device which comprises a receiving drill collar, a transmitting drill collar, an inclined transmitting antenna assembly, a first conventional receiving antenna and a second conventional receiving antenna. The inclined transmitting antenna assembly is used for transmitting signals to the first conventional receiving antenna and the second conventional receiving antenna, and the first conventional receiving antenna and the second conventional receiving antenna are used for receiving the signals transmitted by the inclined transmitting antenna assembly; the receiving drill collar and the transmitting drill collar are cylindrical, and the receiving drill collar and the transmitting drill collar are coaxially and fixedly connected; the first conventional receiving antenna and the second conventional receiving antenna are mounted on the transmitting drill collar; according to the while-drilling detection electromagnetic wave transmitting device, on the basis of a conventional near-bit instrument, the inclined transmitting antenna and the two groups of conventional receiving antennas are arranged, so that the instrument has the functions of ultra-far detection foresight and stratum boundary detection.

Description

Technical Field

[0001] This application belongs to the technical field of drilling exploration, and particularly relates to an electromagnetic wave transmitting device for logging while drilling. Background Art

[0002] In order to evaluate complex geological conditions, improve the drilling encounter rate, and achieve long-distance detection, in the market condition of large-scale horizontal well drilling in oil fields, it is urgent to develop a logging while drilling instrument with the functions of long-distance detection and boundary detection to keep the wellbore trajectory within the oil layer and increase the oil drainage area.

[0003] Currently, most of the near-bit instruments while drilling only integrate a single measurement module, such as a gamma ray or a resistivity single-group antenna, etc., with relatively single functions, poor adaptability in environments such as complex formations and horizontal wells in thin target layers, and low usage efficiency. Summary of the Invention

[0004] In order to overcome the defects existing in the above-mentioned prior art, this application provides an electromagnetic wave transmitting device for logging while drilling. To achieve the above object, this application provides the following technical solutions:

[0005] An electromagnetic wave transmitting device for logging while drilling, comprising: a receiving drill collar, a transmitting drill collar, an inclined transmitting antenna assembly, a first conventional receiving antenna, and a second conventional receiving antenna; wherein, the inclined transmitting antenna assembly is used to transmit signals to the first conventional receiving antenna and the second conventional receiving antenna, and the first conventional receiving antenna and the second conventional receiving antenna are used to receive the signals transmitted by the inclined transmitting antenna assembly;

[0006] Both the receiving drill collar and the transmitting drill collar are cylindrical, and the receiving drill collar and the transmitting drill collar are coaxially fixedly connected; the first conventional receiving antenna and the second conventional receiving antenna are installed on the transmitting drill collar; the inclined transmitting antenna assembly is installed on the transmitting drill collar, and the longest projection of the inclined transmitting antenna assembly on the transmitting drill collar is inclined to the axis of the transmitting drill collar;

[0007] A circuit measurement module is installed on the transmitting drill collar, and the functions of the circuit measurement module include measuring the resistivity parameters of the formation.

[0008] Further, the transmitting drill collar includes a transmitting antenna installation section and a circuit installation section. Among them, a circuit board is installed on the circuit installation section, the diameter of the transmitting antenna installation section is larger than that of the circuit installation section, the inclined transmitting antenna assembly is installed on the transmitting antenna installation section, and the circuit installation section is inserted into the receiving drill collar.

[0009] Further, the receiving drill collar includes a receiving antenna installation section, and the first conventional receiving antenna and the second conventional receiving antenna are both installed on the antenna installation section.

[0010] Further, wear-resistant bands are respectively provided on the receiving drill collar and the transmitting drill collar. The diameter of the wear-resistant band on the receiving drill collar is greater than the diameter of the receiving drill collar, and the diameter of the wear-resistant band on the transmitting drill collar is greater than the diameter of the transmitting drill collar.

[0011] Further, the transmitting drill collar further includes a sealing section and a first threaded section. A sealing hole and a first threaded hole are provided on the receiving drill collar. The sealing section and the first threaded section are respectively located on both sides of the circuit installation section. The first threaded hole is engaged with the first threaded section to connect the receiving drill collar and the transmitting drill collar. The sealing section is in clearance fit with the sealing hole; a first sealing ring is provided between the sealing section and the sealing hole to seal one end of the circuit installation section; a second sealing ring is provided between the first threaded hole and the first threaded section to seal the other end of the circuit installation section.

[0012] Further, both the first conventional receiving antenna and the second conventional receiving antenna include a plurality of magnetic cores circumferentially distributed along the receiving drill collar, a wound antenna, and a receiving antenna cover. A plurality of grooves for installing magnetic cores are provided on the receiving drill collar corresponding to the first conventional receiving antenna and the second conventional receiving antenna. Each magnetic core corresponds to one groove; the wound antenna is wound around the receiving drill collar, and the wound antenna covers the magnetic cores. The receiving antenna cover is welded to the receiving drill collar body corresponding to the wound antenna.

[0013] Further, the inclined transmitting antenna assembly includes a transmitting magnetic core, a transmitting wound antenna, and a transmitting antenna cover. A transmitting antenna winding groove and a drill collar body groove are provided on the transmitting drill collar. The transmitting antenna winding grooves are elliptically and equidistantly distributed on the transmitting drill collar. The transmitting magnetic core is inserted into the drill collar body groove. The transmitting wound antenna is wound around the transmitting antenna winding groove. The transmitting antenna cover is welded to the transmitting drill collar corresponding to the transmitting wound antenna.

[0014] Further, a T-shaped transmitting antenna interface is provided on the transmitting drill collar. The T-shaped transmitting antenna interface is used to connect the inclined transmitting antenna assembly and the circuit measurement module.

[0015] Further, a T-shaped receiving antenna interface is provided on the receiving drill collar. The T-shaped receiving antenna interface is used to connect the first conventional receiving antenna, the second conventional receiving antenna, and the circuit measurement module.

[0016] Further, a circuit board groove is provided on the circuit installation section, and an integrated circuit board is provided on the circuit groove. The circuit measurement module is integrated on the circuit board.

[0017] Further, a battery pack composed of multiple batteries is also installed on the circuit installation section.

[0018] Further, it further includes: a gamma probe module, which is integrated on a circuit board and is used to receive gamma rays in the formation.

[0019] Technical effects and advantages of the present application:

[0020] Based on the conventional near-bit instruments, the electromagnetic wave emission device for logging while drilling of the present invention is provided with an inclined transmitting antenna and two groups of conventional receiving antennas, enabling the instrument to have the functions of ultra-long-range detection and forward-looking, and detecting the formation boundary.

[0021] Other features and advantages of the present application will be described in the subsequent description, and some of them will become obvious from the description, or can be understood by implementing the present application. The objectives and other advantages of the present application can be achieved and obtained through the structures pointed out in the description and the drawings. Description of the Drawings

[0022] Figure 1 It is a schematic diagram of the overall structure of an electromagnetic wave emission device for logging while drilling of the present application (front view);

[0023] Figure 2 It is a schematic diagram of the overall structure of an electromagnetic wave emission device for logging while drilling of the present application (section view);

[0024] Figure 3 It is a schematic diagram of the overall composition layout of an electromagnetic wave emission device for logging while drilling of the present application (exploded view);

[0025] Figure 4 It is a schematic diagram of the structure of a conventional receiving antenna in the present application (section view);

[0026] Figure 5 It is a schematic diagram of the structure of a transmitting drill collar in the present application (front view);

[0027] Figure 6 It is a schematic diagram of the wire groove of the receiving drill collar and the circuit measurement cabin in the present application (partial enlarged view);

[0028] Figure 7 It is a schematic diagram of the structure of the data port in the present application (section view);

[0029] Figure 8 It is a schematic diagram of the torque setting structure in the present application (section view);

[0030] Figure 9 It is a schematic diagram of the overall structure of the inclined transmitting antenna assembly in the present application (top view);

[0031] Figure 10 It is a schematic diagram of the T-shaped interface structure of the inclined transmitting antenna in the present application (section view);

[0032] Figure 11Schematic diagram of the installation hole structure of the T-shaped interface single-core connector of this application;

[0033] Figure 12 Schematic diagram (front view) of the winding groove of the inclined transmitting antenna of this application;

[0034] Wherein:

[0035] 1 - Receiving drill collar, 2 - First conventional receiving antenna, 3 - Wear-resistant belt of receiving drill collar, 4 - Interface plug, 5 - Second conventional receiving antenna, 6 - Wear-resistant belt of transmitting drill collar, 7 - Transmitting drill collar, 8 - Inclined transmitting antenna assembly, 9 - Torque setting device, 10 - Sealing section, 11 - First sealing ring, 12 - API thread, 13 - Guide ring, 14 - Magnetic core, 15 - Receiving antenna cover, 16 - Circuit measurement module, 17 - Mud channel, 18 - High-torque trapezoidal thread, 19 - Second sealing ring, 20 - T-shaped transmitting antenna interface, 21 - Thread for connecting bit, 22 - Receiving T-shaped cover plate, 23 - First fixing screw, 24 - Waveform circlip, 25 - Gamma probe module, 26 - Battery pack, 27 - Second fixing screw, 28 - Transmitting T-shaped cover plate, 29 - Pressing block, 30 - Single-core pressure-bearing connector, 31 - Wound antenna, 32 - Docking interface, 33 - Wiring groove, 34 - Single-core sealing rubber sleeve, 35 - Transmitting antenna cover, 36 - Connecting hole of transmitting T-shaped interface, 37 - Winding groove of transmitting antenna, 38 - Groove of drill collar body. Specific embodiments

[0036] Next, the technical solutions in the embodiments of this application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are only a part of the embodiments of this application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of this application.

[0037] In addition, in the invention, the terms "first", "second" and other similar terms do not imply any order, quantity and importance, but are only used to distinguish different elements. The terms "upper", "lower", "left", "right" and other similar terms are only the positional relationships in the drawings.

[0038] A downhole electromagnetic wave transmitting device of this application solves the integrated design problems of the inclined transmitting antenna, the conventional receiving antenna and the gamma detector; adopts a local sleeve method to place the circuit measurement module to the maximum extent, shortening the length of the instrument; solves the reliability design and winding sealing problems of the inclined transmitting antenna; solves the anti-vibration interference ability of the circuit measurement module of the instrument through a special anti-vibration structure process, which will be specifically described through the following embodiments.

[0039] As Figure 1As shown in the figure, an electromagnetic wave transmitting device for ultra-long detection while drilling according to an embodiment of the present application includes: a receiving drill collar 1, a transmitting drill collar 7, an inclined transmitting antenna assembly 8, a first conventional receiving antenna 2, and a second conventional receiving antenna 5. Among them, both the receiving drill collar 1 and the transmitting drill collar 7 are cylindrical, and the receiving drill collar 1 and the transmitting drill collar 7 are fixedly connected coaxially. The first conventional receiving antenna 2 and the second conventional receiving antenna 5 are installed on the transmitting drill collar 1, and the first conventional receiving antenna 2 and the second conventional receiving antenna 5 are 200 - 330 mm apart. Exemplarily, the first conventional receiving antenna 2 and the second conventional receiving antenna 5 are 280 mm apart. The inclined transmitting antenna assembly 8 is installed on the transmitting drill collar 7 and is 600 - 70 mm away from the second conventional receiving antenna 5. The longest projection of the inclined transmitting antenna assembly 8 on the transmitting drill collar 7 is inclined to the axis of the transmitting drill collar 7. Exemplarily, the inclined transmitting antenna assembly 8 is 650 mm away from the second conventional receiving antenna 5. The inclined transmitting antenna assembly 8 is used to transmit signals to the first conventional receiving antenna 2 and the second conventional receiving antenna 5, and the first conventional receiving antenna 2 and the second conventional receiving antenna 5 are used to receive the signals transmitted by the inclined transmitting antenna assembly 8. A circuit measurement module 16 is installed on the transmitting drill collar 7, and the functions of the circuit measurement module 16 include measuring the resistivity parameters of the formation.

[0040] As Figure 2 shown, in an embodiment of the present application, the transmitting drill collar 7 includes a transmitting antenna installation section and a circuit installation section. Among them, a circuit board is installed on the circuit installation section, the diameter of the transmitting antenna installation section is larger than that of the circuit installation section, and the inclined transmitting antenna assembly 8 is installed on the transmitting antenna installation section. The receiving drill collar 1 includes a receiving antenna installation section and an API connection section 12. Threads are provided on the outer circumferential surface of the API connection section 12. Among them, the API connection section 12 is provided at one end of the receiving antenna installation section away from the transmitting drill collar 7. A cavity is provided inside the receiving antenna installation section. After the transmitting drill collar 7 and the receiving drill collar 1 are assembled, the circuit installation section is located in the cavity inside the antenna installation section. An axial through hole is provided inside the API connection section 12, and a mud channel 17 is provided axially inside the transmitting drill collar 7. The through hole is communicated with the mud channel 17. A female thread section 21 is further provided at one end of the transmitting drill collar 7 away from the receiving drill collar 1. Exemplarily, the diameter of the instrument mud channel 17 is 45 mm. The first conventional receiving antenna 2 and the second conventional receiving antenna 5 are both installed on the antenna installation section

[0041] As Figure 1 shown, in an embodiment of the present application, a receiving drill collar wear-resistant band 3 and a transmitting drill collar wear-resistant band 6 are respectively provided on the receiving drill collar 1 and the transmitting drill collar 7, which can reduce the wear of the inclined transmitting antenna assembly 8, the first conventional receiving antenna 2, and the second conventional receiving antenna 5.

[0042] As Figure 2 shown, in an embodiment of the present application, by way of example, a sealing section 10 and a first threaded section are further provided on the transmitting drill collar 7, a sealing hole and a first threaded hole are provided on the receiving drill collar 1, the sealing section 10 and the first threaded section are respectively located on both sides of the circuit installation section, wherein the sealing section 10 is provided at one end of the transmitting drill collar 7 close to the API connection section 12, the sealing section 10 is made of erosion-resistant ceramics, is in clearance fit with the sealing hole, and a plurality of first sealing rings 11 are provided between the sealing section 10 and the sealing hole; two sections of high-torque trapezoidal threads 18 that cooperate with each other are respectively provided on the first threaded section and the first threaded hole, and a second sealing ring 19 is provided between the first threaded section and the first threaded hole. The sealing section 10 is made of erosion-resistant ceramics, which can avoid the scouring and corrosion of the mud and is also convenient for maintenance and replacement.

[0043] As Figure 3 and Figure 4 shown, in an embodiment of the present application, the first conventional receiving antenna 2 and the second conventional receiving antenna 5 both include a plurality of magnetic cores 14 distributed along the circumference of the receiving drill collar 1, a wound antenna 31, and a receiving antenna cover 15. A plurality of grooves for installing the magnetic cores 14 are provided on the receiving drill collar 1 corresponding to the first conventional receiving antenna 2 and the second conventional receiving antenna 5, and each magnetic core 14 corresponds to one groove; when assembling the first conventional receiving antenna 2 and the second conventional receiving antenna 5, first insert the magnetic cores 14 into the grooves of the drill collar body, then wind the wound antenna 31 around the circumferential groove on the drill collar body above the magnetic cores, and then weld the receiving antenna cover 15 to the receiving drill collar 1 body. A through groove is opened on the receiving antenna cover 15 to facilitate the propagation of the instrument signal. Finally, potting glue is used to fill the first conventional receiving antenna 2 and the second conventional receiving antenna 5 to prevent mud from entering the inside of the receiving antenna cover 15.

[0044] As Figure 9 and Figure 12 shown, in an embodiment of the present application, the inclined transmitting antenna assembly 8 includes a transmitting magnetic core, a transmitting wound antenna, and a transmitting antenna cover 35. A transmitting antenna winding groove 37 is provided on the transmitting drill collar 7, and the transmitting antenna winding grooves 37 are evenly distributed in an elliptical shape on the transmitting drill collar 7. The inclined transmitting antenna assembly 8 is inclined at 45° to the axial direction of the transmitting drill collar 7 and adopts an elliptical surface distributed magnetic core design structure. Insert the transmitting magnetic core into the groove 38 of the drill collar body, then wind the wound antenna along the 45° plane around the transmitting antenna winding groove 37, and then weld and seal with the transmitting antenna cover 35. A through groove is opened on the transmitting antenna cover 35 to facilitate the propagation of the instrument signal. Finally, the inclined transmitting antenna assembly 8 is filled with potting glue.

[0045] As Figure 2As shown, in an embodiment of the present application, a T-shaped transmitting antenna interface 20 is provided on the transmitting drill collar 7. The T-shaped transmitting antenna interface 20 is used to connect the inclined transmitting antenna assembly 8 and the circuit measurement module 16.

[0046] As Figure 3 and Figure 11 shown, exemplarily, the T-shaped transmitting antenna interface 20 includes a transmitting T-shaped cover plate 28, a pressing block 29, a single-core pressure-bearing connector 30, and a single-core sealing rubber sleeve 34. Among them, the single-core sealing rubber sleeve 34 is located in a groove on the transmitting drill collar 7. The T-shaped cover plate 28 is installed on the transmitting drill collar 7 through the second fixing screw 27. The pressing block 29 is located between the T-shaped cover plate 28 and the single-core sealing rubber sleeve 34. The pressing block 29 is used for locking the single-core sealing rubber sleeve 34. The measurement signal is transmitted through the docking of the single-core pressure-bearing connector 30 and the single-core sealing rubber sleeve 34. Among them, the single-core pressure-bearing plug 30 is an electromechanical interface, which has both pressure-bearing and electrical insulation functions. As Figure 10 shown, a transmitting T-shaped interface connection hole 36 is also provided on the transmitting drill collar 7 corresponding to the T-shaped transmitting antenna interface 20. The transmitting T-shaped interface connection hole 36 is used to provide a line channel, and this line is used to connect the inclined transmitting antenna assembly 8 and the circuit board.

[0047] As Figure 3 shown, a T-shaped receiving antenna interface is provided on the receiving drill collar 1. The T-shaped receiving antenna interface is used to connect the first conventional receiving antenna 2, the second conventional receiving antenna 5, and the circuit measurement module 16. The T-shaped receiving antenna interface includes a receiving T-shaped cover plate 22 and a first fixing screw 23. The T-shaped cover plate is fixed on the receiving drill collar 1 through the first fixing screw 23. And, as Figure 5 shown, a docking interface 32 is also provided on the circuit installation section of the transmitting drill collar 7 to connect the transmitting drill collar 7 and the receiving drill collar 1. Correspondingly, an opening is provided on the receiving drill collar 1 corresponding to the docking interface 32, and a wave spring 24 is installed in the opening for clamping the docking joint. As Figure 6 shown, a wiring groove 33 is provided on the circuit installation section near the sealing section. The wiring groove 33 is used to arrange the cable, and the cable is used to connect the circuit board and the first conventional receiving antenna 2.

[0048] As Figure 2 and Figure 3As shown in the figure, in an embodiment of the present application, a circuit board slot is provided on the circuit installation section. An integrated circuit board is provided on the circuit slot. The circuit measurement module 16 is integrated on the circuit board. The circuit measurement module 16 is used to process the logging information transmitted by the first conventional receiving antenna 2, the second conventional receiving antenna 5, and the inclined transmitting antenna assembly 8. Among them, the circuit measurement module 16 is located on the circuit installation section of the transmitting drill collar 7. Since the logging-while-drilling signal is a weak signal, interference will be generated. A shielding case made of aluminum is used to prevent mutual interference during signal reception and processing. A guiding ring 13 is provided at one end of the circuit installation section close to the API connection section 12 to reduce the friction between the transmitting drill collar 7 and the receiving drill collar 1 and protect the first sealing ring 11, reducing the wear of the first sealing ring 11. The first sealing ring 11 and the second sealing ring 19 are respectively sealed at both ends of the circuit installation end to ensure the normal operation of the circuit measurement module.

[0049] As Figure 3 shown, a battery pack 26 composed of multiple batteries is also installed on the transmitting drill collar 7. The circuit measurement module 16 is powered by the battery pack 26 to realize the acquisition and processing of measurement signals.

[0050] In an embodiment of the present application, a logging-while-drilling electromagnetic wave transmitting device further includes: a gamma probe module 25. The gamma probe module is integrated on the circuit board. The gamma probe module is used to receive gamma rays in the formation, and after being processed by the detector, it is converted into an electrical signal that can be monitored, for detecting gamma ray parameters in the formation.

[0051] In the above embodiments, the present application effectively solves the integrated design of the inclined transmitting antenna, conventional receiving antenna, battery pack, circuit module, and gamma probe module for near-bit far-detection electromagnetic wave edge detection; adopts the method of a local sleeve to solve the problem of axial communication wire passing of the electromagnetic wave instrument; the inclined transmitting antenna adopts a distributed magnetic core structure to solve the problems of antenna design and winding process; the instrument wire passing in the drill collar adopts an independent wire passing design to solve the problem of transmission interference of weak signals; the inner drill collar wire passing hole and the circuit slot adopt an anti-shielding design to solve the problem of signal interference between circuit boards.

[0052] The following is a detailed description of the operation process of the embodiments of the present application:

[0053] When the logging-while-drilling electromagnetic wave transmitting device is used for logging, as a part of the bottomhole assembly BHA, it is lowered into the well together with the drill string. The instrument is powered by its own battery pack. The logging signals of the near-bit instrument are generally uploaded to the upper conventional logging-while-drilling instrument through wireless short-range transmission, and then transmitted to the ground through a mud pulse generator for geological interpretation and storage of logging data. The power supply of the instrument is provided by its own battery pack. The main functions of the instrument are to measure the resistivity of complex formations and detect the formation boundary, and at the same time, it can measure the formation gamma to identify the formation lithology.

[0054] Finally, it should be noted that the above are only preferred embodiments of the present application and are not used to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A downhole electromagnetic wave emission device for logging while drilling, characterized in that, Including: A receiving drill collar (1), a transmitting drill collar (7), an inclined transmitting antenna assembly (8), a first conventional receiving antenna (2), and a second conventional receiving antenna (5); wherein, the inclined transmitting antenna assembly (8) is used to transmit signals to the first conventional receiving antenna (2) and the second conventional receiving antenna (5), and the first conventional receiving antenna (2) and the second conventional receiving antenna (5) are used to receive the signals transmitted by the inclined transmitting antenna assembly (8); Both the receiving drill collar (1) and the transmitting drill collar (7) are cylindrical, and the receiving drill collar (1) and the transmitting drill collar (7) are fixedly connected coaxially; the first conventional receiving antenna (2) and the second conventional receiving antenna (5) are installed on the transmitting drill collar (1); the inclined transmitting antenna assembly (8) is installed on the transmitting drill collar (7), and the longest projection of the inclined transmitting antenna assembly (8) on the transmitting drill collar (7) is inclined to the axis of the transmitting drill collar (7); A circuit measurement module (16) is installed on the transmitting drill collar (7), and the functions of the circuit measurement module (16) include measuring the resistivity parameters of the formation.

2. The electromagnetic wave emission device for measurement while drilling according to claim 1, wherein The transmitting drill collar (7) includes a transmitting antenna installation section and a circuit installation section. Wherein, a circuit board is installed on the circuit installation section, the diameter of the transmitting antenna installation section is larger than that of the circuit installation section, the inclined transmitting antenna assembly (8) is installed on the transmitting antenna installation section, and the circuit installation section is inserted into the receiving drill collar (1).

3. The electromagnetic wave emission device for logging while drilling according to claim 1, characterized in that, The receiving drill collar (1) includes a receiving antenna installation section, and the first conventional receiving antenna (2) and the second conventional receiving antenna (5) are both installed on the antenna installation section.

4. The electromagnetic wave emission device for downhole detection according to claim 1, wherein, Receiving drill collar wear-resistant bands (3) and transmitting drill collar wear-resistant bands (6) are respectively provided on the receiving drill collar (1) and the transmitting drill collar (7), the diameter of the receiving drill collar wear-resistant band (3) is larger than that of the receiving drill collar (1), and the diameter of the transmitting drill collar wear-resistant band (6) is larger than that of the transmitting drill collar (7).

5. The electromagnetic wave emission device for measurement while drilling according to claim 1, characterized in that, The transmitting drill collar (7) further includes a sealing section (10) and a first threaded section. A sealing hole and a first threaded hole are provided on the receiving drill collar (1). The sealing section (10) and the first threaded section are respectively located on both sides of the circuit installation section. The first threaded hole is matched with the first threaded section to connect the receiving drill collar (1) and the transmitting drill collar (7), and the sealing section (10) is in clearance fit with the sealing hole; a first sealing ring (11) is provided between the sealing section (10) and the sealing hole to seal one end of the circuit installation section; a second sealing ring (19) is provided between the first threaded hole and the first threaded section to seal the other end of the circuit installation section.

6. The electromagnetic wave emission device for downhole detection according to claim 1, wherein The first conventional receiving antenna (2) and the second conventional receiving antenna (5) both include a plurality of magnetic cores (14) circumferentially distributed along the receiving drill collar (1), a wound antenna (31), and a receiving antenna cover (15). A plurality of grooves for mounting the magnetic cores (14) are provided on the receiving drill collar (1) corresponding to the first conventional receiving antenna (2) and the second conventional receiving antenna (5), and each magnetic core (14) corresponds to one groove. The wound antenna (31) is wound around the receiving drill collar (1), and the wound antenna (31) covers the magnetic core (14). The receiving antenna cover (15) is welded to the receiving drill collar (1) body at the position corresponding to the wound antenna (31).

7. The electromagnetic wave emission device for logging while drilling according to claim 1, characterized in that The inclined transmitting antenna assembly (8) includes a transmitting magnetic core, a transmitting wound antenna, and a transmitting antenna cover (35). A transmitting antenna winding groove (37) and a drill collar body groove (38) are provided on the transmitting drill collar (7). The transmitting antenna winding grooves (37) are elliptically and equidistantly distributed on the transmitting drill collar (7). The transmitting magnetic core is inserted into the drill collar body groove (38), the transmitting wound antenna is wound around the transmitting antenna winding groove (37), and the transmitting antenna cover (35) is welded to the transmitting drill collar (7) at the position corresponding to the transmitting wound antenna.

8. The electromagnetic wave emission device for logging while drilling according to claim 1, characterized in that A T-shaped transmitting antenna interface (20) is provided on the transmitting drill collar (7), and the T-shaped transmitting antenna interface (20) is used to connect the inclined transmitting antenna assembly (8) and the circuit measurement module (16).

9. The electromagnetic wave emission device for downhole detection according to claim 1, characterized in that A T-shaped receiving antenna interface is provided on the receiving drill collar (1), and the T-shaped receiving antenna interface is used to connect the first conventional receiving antenna (2), the second conventional receiving antenna (5), and the circuit measurement module (16).

10. The electromagnetic wave emission device for logging while drilling according to claim 2, characterized in that, A circuit board slot is provided on the circuit installation section, and an integrated circuit board is provided on the circuit slot. The circuit measurement module (16) is integrated on the circuit board.

11. The electromagnetic wave emission device for downhole detection according to claim 2, characterized in that, A battery pack (26) composed of multiple batteries is also installed on the circuit installation section.

12. The electromagnetic wave emission device for logging-while-drilling according to claim 10, characterized in that, Further included is: A gamma probe module (25), which is integrated on the circuit board and is used to receive gamma rays in the formation.

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