Downhole instrument antenna structure

Abstract

The utility model discloses a downhole instrument antenna structure, which comprises a drill collar main body, an antenna layout groove and a pin cover plate groove are arranged on the drill collar main body, and the antenna layout groove is communicated with the pin cover plate groove through a wire passing port; the contact pin cover plate is matched in the contact pin cover plate groove, and the surface of one side, facing the drill collar main body, of the contact pin cover plate is provided with an antenna avoiding groove which is concavely formed in the surface. The antenna structure of the downhole instrument has the advantages of being good in sealing performance, high in reliability, convenient to install and the like.

Description

Technical Field

[0001] This utility model relates to the field of measurement while drilling technology, and more specifically, to a downhole instrument antenna structure. Background Technology

[0002] As a key component for signal transmission in downhole instruments, the sealing performance of the antenna and its related structures directly affects the reliability and service life of the instrument. With the continuous expansion of downhole instrument applications, the requirements for antenna sealing structures are becoming increasingly stringent. This is especially true in deep and ultra-deep well operations, where instruments need to withstand higher pressures and temperatures.

[0003] The antenna structure of downhole instruments in related technologies requires sealing the insertion pin to prevent mud from entering the insertion pin hole. The antenna is prone to bending at the insertion pin location. When the drill bit rotates, the bending point is prone to vibration and displacement. Long-term operation can easily lead to failure or even damage of the sealing structure. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a downhole instrument antenna structure, which has advantages such as good sealing performance, high reliability, and convenient installation.

[0005] To achieve the above objectives, an embodiment of the present invention provides a downhole instrument antenna structure, comprising: a drill collar body, wherein the drill collar body is provided with an antenna layout slot and a pin cover plate slot, the antenna layout slot and the pin cover plate slot being connected through a cable passage; and a pin cover plate, wherein the pin cover plate is fitted into the pin cover plate slot, and the side surface of the pin cover plate facing the drill collar body has an antenna clearance groove recessed therein.

[0006] The downhole instrument antenna structure according to the embodiments of this utility model has the advantages of good sealing, high reliability, and convenient installation.

[0007] In addition, the downhole instrument antenna structure according to the above embodiments of this utility model may also have the following additional technical features:

[0008] According to one embodiment of the present invention, the antenna clearance groove and the wire passage are located at the same position in the axial direction of the drill collar body.

[0009] According to one embodiment of the present invention, the side surface of the pin cover plate facing the drill collar body is further provided with a wiring groove, and the wiring groove is connected to the antenna clearance groove.

[0010] According to one embodiment of the present invention, positioning portions are provided on both sides of the end of the wiring groove away from the antenna avoidance groove.

[0011] According to one embodiment of the present invention, the pin cover plate is flush with the outer peripheral surface of the drill collar body.

[0012] According to one embodiment of the present invention, the downhole instrument antenna structure further includes: an antenna pin assembly, wherein the pin cover groove is provided with a pin hole, and the antenna pin assembly is fitted into the pin hole; and an antenna, wherein the antenna is arranged in the antenna layout groove and connected to the antenna pin assembly through the cable passage and the antenna clearance groove.

[0013] According to one embodiment of the present invention, the downhole instrument antenna structure further includes: a tuning circuit board, wherein a tuning chamber is provided on the outer peripheral surface of the drill collar body, the tuning circuit board is installed in the tuning chamber, the tuning chamber is connected to the pin hole through a connecting hole, the tuning chamber is connected to the end face of the drill collar body through an end face through hole, and the tuning circuit board is electrically connected to the antenna pin assembly through the connecting hole; and a tuning cover plate, the tuning cover plate being installed on the drill collar body and covering the tuning chamber.

[0014] According to one embodiment of the present invention, the tuning cover plate includes: a cover plate body, the cover plate body being a rectangular plate and mounted on the drill collar body by threaded fasteners located at the four corners of the cover plate body; and a sealing protrusion, the sealing protrusion being annular on one end face of the cover plate body facing the tuning chamber.

[0015] According to one embodiment of the present invention, the drill collar body is made of non-magnetic stainless steel, the pin cover is made of nickel alloy, and the tuning cover is made of nickel alloy.

[0016] According to one embodiment of the present invention, the pin cover extends along the axial direction of the drill collar body and is mounted on the drill collar body by a plurality of threaded fasteners spaced apart along the length direction of the pin cover.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a schematic diagram of the structure of the downhole instrument antenna according to an embodiment of the present utility model.

[0020] Figure 2This is a partial cross-sectional view of the downhole instrument antenna structure according to an embodiment of the present utility model.

[0021] Figure 3 This is a partial cross-sectional view of the downhole instrument antenna structure according to an embodiment of the present utility model.

[0022] Figure 4 This is a cross-sectional view of the downhole instrument antenna structure according to an embodiment of the present utility model.

[0023] Figure 5 yes Figure 4 Enlarged view of point A in the middle.

[0024] Figure 6 This is a schematic diagram of the drill collar body of the downhole instrument antenna structure according to an embodiment of the present utility model.

[0025] Figure 7 This is a schematic diagram of the tuning cover plate of the downhole instrument antenna structure according to an embodiment of the present utility model.

[0026] Figure 8 This is a schematic diagram of the pin cover plate of the downhole instrument antenna structure according to an embodiment of the present utility model.

[0027] Figure 9 This is a schematic diagram of the pin cover plate of the downhole instrument antenna structure according to an embodiment of the present utility model.

[0028] Figure reference numerals: 1. Downhole instrument antenna structure; 10. Drill collar body; 11. Pin hole; 12. Antenna layout slot; 13. Tuning chamber; 14. Connecting hole; 15. Pin cover slot; 16. Cable passage; 17. End face through hole; 18. Inner flow channel; 20. Antenna pin assembly; 21. Single-core pressure-bearing sealing plug; 21. First pin; 211. Second pin; 212. Sealing ring; 213. Adapter; 22. Sealing sleeve; 23. Tuning circuit board; 30. Pin cover; 40. Guide slope; 41. Antenna clearance slot; 42. Cable routing slot; 43. Positioning part; 44. Flexible sealant; 50. Rigid curing adhesive; 60. Tuning cover; 70. Cover body; 71. Sealing protrusion; 72. End face sealing ring; 73. Circumferential sealing ring; 74. Detailed Implementation

[0029] This application is based on the inventor's discoveries and understanding of the following facts and problems:

[0030] The antenna structure of downhole instruments in related technologies requires sealing the insertion pin to prevent mud from entering the insertion pin hole. The antenna is prone to bending at the insertion pin location. When the drill bit rotates, the bending point is prone to vibration and displacement. Long-term operation can easily lead to failure or even damage of the sealing structure.

[0031] In addition, in the downhole instrument antenna structure of the related technology, the axial direction of the pin mounting hole is inclined to the axial direction of the drill collar, and it is inclined radially inward from the end near the tuning cavity to the end near the antenna, so as to make the pin easier to insert and fix, facilitate assembly, replacement and maintenance, and also facilitate the disassembly and maintenance of the tuning cavity.

[0032] However, when the drill bit rotates at high speed, the inclined pin mounting hole will cause the pin to be subjected to centrifugal force, resulting in micro-displacement of the pin. This changes the connection state of the pin and causes fluctuations in the tightness of the coupling between the pin and the tuning cavity, which is not conducive to maintaining the quality and efficiency of signal transmission, especially affecting the transmission stability of high-frequency signals, and ultimately affecting the measurement accuracy.

[0033] In related technologies, downhole instrument antenna structures use plugs, rubber sleeves, sealing rings, and other structures to seal the insertion pin. On the one hand, the sealing effect is difficult to guarantee under extreme working environments. On the other hand, none of these methods can prevent the insertion pin from undergoing micro-displacement under centrifugal force, making it difficult to guarantee measurement accuracy.

[0034] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0035] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0036] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0037] The following description, with reference to the accompanying drawings, describes a downhole instrument antenna structure 1 according to an embodiment of the present invention.

[0038] like Figures 1-9 As shown, the downhole instrument antenna structure 1 according to an embodiment of the present invention includes a drill collar body 10 and a pin cover plate 40.

[0039] The drill collar body 10 is provided with an antenna layout slot 12 and a pin cover plate slot 15, which are connected by a cable pass 16. The pin cover plate 40 is fitted into the pin cover plate slot 15, and the side surface of the pin cover plate 40 facing the drill collar body 10 has an antenna clearance groove 42 recessed on the surface.

[0040] Specifically, the pin cover groove 15 is provided with an antenna pin assembly 20, which is connected to an antenna (not shown in the figure).

[0041] According to the downhole instrument antenna structure 1 of this utility model embodiment, by providing a cable passage 16 on the drill collar body 10, the antenna can be introduced into the pin cover plate groove 15 through the cable passage 16. Moreover, by providing an antenna avoidance groove 42 on the pin cover plate 40, the pin cover plate 40 can avoid the antenna introduced through the cable passage 16. Compared with the downhole instrument antenna structure in the related art, the antenna can be directly introduced into the pin cover plate groove 15 through the cable passage 16 in the antenna layout groove 12, and the pin cover plate 40 will not interfere with the antenna introduction position. This can prevent the antenna from bending at the introduction point, thereby preventing vibration and displacement at the bending point when the drill bit rotates, avoiding failure or even damage to the sealing structure due to vibration and displacement, ensuring the sealing effect of the sealing structure, and also preventing the antenna from affecting the stability of the connection due to vibration and displacement, thereby improving the connection reliability of the antenna. In addition, it can facilitate the installation of the antenna and improve the installation efficiency.

[0042] Therefore, the downhole instrument antenna structure 1 according to the embodiment of this utility model has advantages such as good sealing performance, high reliability, and convenient installation.

[0043] The following description, with reference to the accompanying drawings, describes a specific embodiment of the downhole instrument antenna structure 1 according to the present invention.

[0044] In some specific embodiments of this utility model, such as Figures 1-9 As shown, the downhole instrument antenna structure 1 according to an embodiment of the present invention includes a drill collar body 10 and a pin cover plate 40.

[0045] Specifically, such as Figure 4 and Figure 5 As shown, the antenna clearance slot 42 and the cable passage 16 are positioned axially on the drill collar body 10. This allows the antenna to be introduced from the antenna layout slot 12 to the pin cover slot 15 along the circumference of the drill collar body 10, further preventing the antenna from bending.

[0046] Advantageously, such as Figure 9 As shown, the side surface of the pin cover plate 40 facing the drill collar body 10 is also provided with a wiring groove 43, which is connected to the antenna clearance groove 42. This allows the antenna to be routed along the wiring groove 43 after being introduced into the pin cover plate groove 15, so as to use the wiring groove 43 to position the antenna, further preventing the antenna from vibrating and displacing, avoiding failure or even damage to the sealing structure, further improving the sealing performance, further preventing the antenna from affecting the stability of the connection due to vibration and displacement, further improving the reliability of the antenna connection, and further facilitating the installation of the antenna.

[0047] More advantageously, such as Figure 9 As shown, positioning parts 44 are provided on both sides of the end of the wiring groove 43 away from the antenna clearance groove 42. This allows the positioning parts 44 to further position the antenna, further prevent the antenna from vibrating and shifting, and further improve the sealing performance and connection reliability.

[0048] Figures 1-7 A downhole instrument antenna structure 1 according to some examples of the present invention is shown. For example... Figures 2-4 As shown, the pin cover plate 40 is flush with the outer peripheral surface of the drill collar body 10. This prevents the pin cover plate 40 from protruding from the drill collar body 10 and causing rotational resistance.

[0049] Specifically, such as Figure 2 and Figure 3 As shown, the downhole instrument antenna structure 1 also includes an antenna pin assembly 20 and an antenna. A pin hole 11 is provided within the pin cover groove 15, and the antenna pin assembly 20 fits into the pin hole 11. The antenna is positioned within the antenna layout groove 12 and connected to the antenna pin assembly 20 via a cable pass 16 and the antenna layout groove 12. This facilitates the connection of the antenna to the antenna pin assembly 20.

[0050] More specifically, such as Figures 1-4 , Figure 6 and Figure 7As shown, the downhole instrument antenna structure 1 also includes a tuning circuit board 30 and a tuning cover plate 70. A tuning chamber 13 is also provided on the outer peripheral surface of the drill collar body 10. The tuning circuit board 30 is installed inside the tuning chamber 13. The tuning chamber 13 is connected to the pin hole 11 through a connecting hole 14. The tuning chamber 13 is connected to the end face of the drill collar body 10 through an end face through hole 17. The tuning circuit board 30 is electrically connected to the antenna pin assembly 20 through the connecting hole 14. The tuning cover plate 70 is installed on the drill collar body 10 and covers the tuning chamber 13. This facilitates the installation of the tuning circuit board 30, allows for protection of the tuning circuit board 30 using the tuning chamber 13 and the tuning cover plate 70, and facilitates the electrical connection of the tuning circuit board 30 through the connecting hole 14 and the end face through hole 17.

[0051] Advantageously, such as Figure 2 and Figure 4 As shown, the tuning cover 70 has a circumferential sealing ring 74 on its circumferential surface and an end sealing ring 73 on the end face facing the tuning chamber 13. This improves the sealing performance between the tuning cover 70 and the tuning chamber 13.

[0052] Thus, the end face sealing ring 73 of the tuning cover 70 prevents most of the mud from entering the tuning chamber 13. After the mud seeps in or the end face sealing ring 73 fails after long-term use downhole, the peripheral sealing ring 74 further prevents the mud from entering the tuning chamber 13.

[0053] Furthermore, as... Figure 1 and Figure 7 As shown, the tuning cover 70 includes a cover body 71 and a sealing protrusion 72. The cover body 71 is a rectangular plate and is mounted on the drill collar body 10 by threaded fasteners located at the four corners of the cover body 71. The sealing protrusion 72 protrudes from the end face of the cover body 71 facing the tuning chamber 13, and the sealing protrusion 72 is annular. This facilitates the installation of the tuning cover 70 and allows the tuning cover 70 to cover and protect the tuning circuit board 30.

[0054] Specifically, the end face sealing ring 73 is located on the end face of the cover plate body 71 facing the tuning chamber 13. The peripheral sealing ring 74 is located on the outer peripheral surface of the sealing protrusion 72. This facilitates the installation of the end face sealing ring 73 and the peripheral sealing ring 74, and the sealing protrusion 72 can further improve the sealing effect of the tuning cover plate 70.

[0055] Optionally, the drill collar body 10 is made of non-magnetic stainless steel, the pin cover 40 is made of nickel alloy, and the tuning cover 70 is made of nickel alloy. This facilitates the improvement of the structural strength and corrosion resistance of the downhole instrument antenna structure 1.

[0056] Furthermore, such as Figure 1 , Figure 4 and Figure 8As shown, the pin cover plate 40 extends along the axial direction of the drill collar body 10 and is mounted on the drill collar body 10 by a plurality of threaded fasteners spaced apart along the length of the pin cover plate 40. This facilitates the installation of the pin cover plate 40 and improves the installation reliability and sealing performance of the pin cover plate 40.

[0057] Specifically, the single-core pressure-bearing sealing plug 21 is threaded into the pin hole 11, which can improve the installation strength and stability, and further improve the sealing performance.

[0058] The drill collar body 10 has an internal flow channel 18, and the outer surface of the drill collar body 10 forms an external flow channel with other structures. This facilitates the flow of drilling mud.

[0059] There are two pin holes 11 and two antenna pin assemblies 20. The two antenna pin assemblies 20 are respectively fitted into the two pin holes 11 and are respectively connected to the two ends of the antenna.

[0060] In some embodiments, the axial direction of the pin hole 11 is inclined to the axial direction of the drill collar body 10, and a flexible sealant 50 is filled between the pin cover plate 40 and the antenna pin assembly 20 inside the pin hole 11. Specifically, the flexible sealant 50 can be a silicone or polyurethane material. This allows the flexible sealant 50 to have good flexibility. By filling the space between the pin cover plate 40 and the antenna pin assembly 20 inside the pin hole 11 with flexible sealant 50, the outer end of the pin hole 11 can be sealed using the flexible sealant 50. Compared with the sealing method in related technologies that only rely on structures such as plugs, rubber sleeves, and sealing rings, the flexible sealant 50 can prevent mud from entering the pin hole 11, thereby further improving the sealing performance of the pin hole 11. Furthermore, the sealing structure in the related technology uses rigid potting compound such as epoxy resin for sealing and encapsulation. After curing, the rigid compound becomes very hard and has almost no elasticity. However, the downhole instrument antenna structure 1 uses flexible sealant 50 in the pin hole 11. The flexible sealant 50 is flexible and can undergo elastic deformation. This elastic deformation can compensate for the effects of mechanical vibration, thermal expansion and contraction caused by temperature fluctuations, and micro-displacement of the antenna pin assembly 20 during drill bit rotation on the sealing effect. This prevents the sealing structure from failing or even being damaged under the influence of vibration, and facilitates better long-term sealing performance. Furthermore, since the axial direction of the pin hole 11 is inclined to the axial direction of the drill collar body 10, the antenna pin assembly 20 will undergo micro-displacement under centrifugal force when the drill bit rotates at high speed. By using flexible sealant 50, when the drill bit rotates at high speed, the flexible sealant 50 will be concentrated towards the outer end of the pin hole 11 under centrifugal force, which increases the density and elasticity of the flexible sealant 50. This at least partially counteracts the tendency of the antenna pin assembly 20 to move towards the pin cover plate 40 under centrifugal force, effectively reducing the micro-displacement of the antenna pin assembly 20, preventing the antenna pin assembly 20 from becoming loose, and ensuring the reliability and stability of the connection between the antenna pin assembly 20 and the antenna and tuning circuit board 30 and the signal transmission, thereby improving the quality and efficiency of signal transmission and improving measurement accuracy.

[0061] Advantageously, such as Figure 2 and Figure 3 As shown, the pin cover plate 40 has a guide slope 41 on the side surface facing the pin hole 11. The drill collar body 10 has a first end and a second end. The axial direction of the pin hole 11 is inclined radially inward from the first end to the second end towards the drill collar body 10 (the inward and outward direction is shown by the arrows in the figure). The guide slope 41 is inclined radially outward from the first end to the second end towards the drill collar body 10. In other words, the inclination direction of the guide slope 41 is opposite to the inclination direction of the pin hole 11. Specifically, the pin hole 11 is located between the antenna and the tuning circuit board 30 and is inclined radially inward towards the drill collar body 10 in the direction from the antenna to the tuning circuit board 30. The guide slope 41 is inclined radially outward towards the drill collar body 10 in the direction from the antenna to the tuning circuit board 30. Figure 2 and Figure 3 The diagram illustrates the arrangement where the left side represents the first end and the right side represents the second end. When the drill bit rotates at high speed, the flexible sealant 50, guided by the guide slope 41, generates a component force towards the second end. This further enhances the force on the antenna pin assembly 20, further counteracts the tendency of the antenna pin assembly 20 to move towards the pin cover plate 40 due to centrifugal force, further reduces the micro-displacement of the antenna pin assembly 20, further prevents the antenna pin assembly 20 from loosening, and further improves the reliability and stability of the connection between the antenna pin assembly 20 and the antenna and tuning circuit board 30, as well as signal transmission. This further improves the quality and efficiency of signal transmission and further enhances measurement accuracy.

[0062] Specifically, such as Figure 2 and Figure 3 As shown, the antenna pin assembly 20 includes a single-core pressure-bearing sealing plug 21, an adapter 22, and a sealing sleeve 23. The single-core pressure-bearing sealing plug 21 has a first pin 211 and a second pin 212 at both ends. The first pin 211 is adjacent to the pin cover plate 40 relative to the second pin 212, and the second pin 212 is electrically connected to the tuning circuit board 30. The adapter 22 is connected to the antenna, and the first pin 211 is inserted into the adapter 22. The sealing sleeve 23 is fitted over a portion of the single-core pressure-bearing sealing plug 21 adjacent to the pin cover plate 40 and the adapter 22. This allows for electrical connection between the first pin 211 and the antenna using the adapter 22, and the sealing sleeve 23 protects and seals the connection between the first pin 211 and the adapter 22, improving the sealing performance of the antenna pin assembly 20.

[0063] More specifically, such as Figure 2 and Figure 3 As shown, a sealing ring 213 is provided on the outer circumferential surface of the single-core pressure-bearing sealing plug 21, which seals the gap between the single-core pressure-bearing sealing plug 21 and the pin hole 11. This can further improve the sealing performance between the antenna pin assembly 20 and the pin hole 11.

[0064] More advantageously, the sealing sleeve 23 is interference-fitted with the pin hole 11, and the single-core pressure-bearing sealing plug 21 is interference-fitted with the sealing sleeve 23. This not only further improves the sealing performance between the pin hole 11 and the antenna pin assembly 20, but also improves the sealing performance between the single-core pressure-bearing sealing plug 21 and the sealing sleeve 23.

[0065] Furthermore, such as Figure 1 and Figure 6As shown, the outer circumferential surface of the drill collar body 10 is provided with an antenna layout groove 12, and the antenna is arranged in the antenna layout groove 12. The antenna is encapsulated in the antenna layout groove 12 by a rigid curing adhesive 60. Specifically, the rigid curing adhesive 60 can be an epoxy resin material. This not only achieves antenna encapsulation and prevents antenna displacement, but also improves the sealing performance at the antenna layout groove 12. Since the antenna is in direct contact with the mud and experiences significant wear, using the rigid curing adhesive 60 can improve the hardness and wear resistance of the encapsulating adhesive, effectively protecting the antenna.

[0066] Therefore, the rigid curing adhesive 60 can prevent most of the mud from entering the drill collar body 10 through the antenna layout slot 12. Mud that partially penetrates the rigid curing adhesive 60 and the pin cover plate 40 and enters the pin hole 11 is first further isolated by the flexible sealant 50 and the sealing sleeve 23 to prevent further mud entry into the pin hole 11. Secondly, the sealing sleeve 23 can prevent mud from entering the antenna pin assembly 20. Finally, the sealing ring 213 further prevents mud from penetrating deep into the pin hole 11 and the connecting hole 14. This multi-stage sealing structure can still provide a good sealing effect even after some sealing structures fail after prolonged use.

[0067] The following is for reference. Figures 1-9 The assembly method of the downhole instrument antenna structure 1 according to a specific embodiment of the present invention is described.

[0068] The antenna is positioned in the antenna layout slot 12 of the drill collar body 10, with both ends extending out. The sealing ring 213 of the single-core pressure-bearing sealing plug 21 of the antenna pin assembly 20 is installed. A wire is welded to the second pin 212, passing through the pin hole 11 and the connecting hole 14, and then exiting from the tuning chamber 13. The single-core pressure-bearing sealing plug 21 is threadedly connected to the pin hole 11 using a tool. Both ends of the antenna are passed through the sealing sleeves 23 of the two antenna pin assemblies 20 and welded to the adapter 22 of the antenna pin assembly 20. The welded adapter 22 is inserted into the sealing sleeve 23, and the sealing sleeve 23 is inserted into the pin hole 11 using a tool, ensuring that the sealing sleeve 23 is properly installed on the single-core pressure-bearing sealing plug 21. Flexible sealant 50 is applied to the remaining gaps in the pin hole 11. The lead wires of the two antenna pin assemblies 20 are soldered to the tuning circuit board 30. Two signal lines are led out from the tuning circuit board 30 from the end face through hole 17 to the end face of the drill collar body 10. The end face sealing ring 73 is installed on the cover plate body 71, and the peripheral sealing ring 74 is installed on the outer peripheral surface of the sealing protrusion 72. The tuning cover plate 70 is connected to the drill collar body 10 using four external hex bolts. The pin cover plate 40 is installed into the pin cover plate groove 15 of the drill collar body 10, ensuring that the antenna inlet and outlet lines are located in the antenna clearance groove 42 of the pin cover plate 40 to avoid pressure on the antenna. The pin cover plate 40 is connected to the drill collar body 10 using two external hex bolts. The antenna layout groove 12 is completely potted with rigid curing adhesive 60, ensuring that the rigid curing adhesive 60 is consistent with the outer ring size of the drill collar body 10, thus completing the overall assembly.

[0069] Other configurations and operations of the downhole instrument antenna structure 1 according to the embodiments of this utility model are known to those skilled in the art and will not be described in detail here.

[0070] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0071] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A downhole instrument antenna structure, characterized by, The utility model relates to a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board.

2. The downhole instrument antenna structure of claim 1, wherein, The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board.

3. The downhole instrument antenna structure of claim 1, wherein, The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board.

4. The downhole instrument antenna structure of claim 3, wherein, The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board.

5. The downhole instrument antenna structure of claim 1, wherein, The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board.

6. The downhole instrument antenna structure of claim 1, wherein, The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board.

7. The downhole instrument antenna structure of claim 6, wherein, The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board.

8. The downhole instrument antenna structure of claim 7, wherein, The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board.

9. The downhole instrument antenna structure of claim 7, wherein, The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board.

10. The downhole instrument antenna structure of claim 1, wherein, The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. 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The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit board. The utility model discloses a drill collar, and particularly relates to a drill collar with an antenna and a tuning circuit

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