Pressure-bearing coaxial electric connector for petroleum logging instrument

Abstract

The utility model discloses a pressure-bearing coaxial electric connector for a petroleum logging instrument, which comprises a columnar base body, one end of the columnar base body is provided with a columnar groove, an annular shielding groove is arranged in the columnar groove, the other end of the columnar base body is connected with a columnar boss, and the outer diameter of the columnar boss is the same as the inner diameter of the annular shielding groove. The end, away from the columnar base body, of the columnar boss is connected with a shielding cylinder. The center line of the annular shielding groove, the center line of the columnar boss, the center line of the shielding cylinder and the center line of the columnar base body coincide. A plurality of outer conductor core needle holes penetrating to the other end face of the columnar base body are formed in the end face area between the annular shielding groove and the inner wall of the columnar groove, and outer conductor core needles with the two ends extending out of the outer conductor core needle holes are assembled in the outer conductor core needle holes; a plurality of inner conductor core pin holes penetrating to the end face of the cylindrical boss are formed in the end face of the middle portion of the annular shielding groove, and inner conductor core pins with the two ends extending out of the inner conductor core pin holes are assembled in the inner conductor core pin holes. The purpose of the utility model is to solve the problem that the shielding function is not fully considered during the structural design of a pressure-bearing coaxial electric connector.

Description

Technical Field

[0001] The utility model belongs to the technical field of electrical connectors, and particularly relates to a pressure-bearing coaxial electrical connector for oil well logging instruments. Background Art

[0002] In oil exploration and development, logging technology provides key data for geological interpretation, oil and gas reservoir evaluation, and exploitation plan design by lowering logging instruments into oil wells to measure and record the physical properties of formation rocks. Oil well logging instruments work in harsh downhole environments, not only need to withstand extreme conditions such as high temperature and high pressure, but also need to ensure the accuracy and stability of signal transmission. Therefore, as a key component for signal transmission in logging instruments, the performance of electrical connectors directly affects the reliability of the entire logging system and the quality of data.

[0003] The existing pressure-bearing coaxial electrical connectors for oil well logging instruments mainly focus on pressure-bearing capacity and signal transmission continuity in structural design to ensure stable operation and effective transmission of logging data under high-pressure environments. With the continuous development of logging technology, the requirements for signal transmission quality are increasing day by day. Especially in the case of high-frequency signal transmission and complex electromagnetic environments in wells, the problem that the existing pressure-bearing coaxial electrical connectors do not fully consider the shielding function in structural design gradually emerges. The pressure-bearing coaxial electrical connectors lacking shielding function are easily affected by electromagnetic interference during logging, resulting in signal distortion and increased noise, thereby affecting logging data. Summary of the Invention

[0004] Aiming at the problems existing in the prior art, the utility model provides a pressure-bearing coaxial electrical connector for oil well logging instruments, aiming to solve the problem that the shielding function is not fully considered in the structural design of the pressure-bearing coaxial electrical connector.

[0005] In order to solve the above technical problems, the utility model is realized through the following technical solutions:

[0006] A pressure-bearing coaxial electrical connector for a petroleum logging instrument, comprising a columnar base body. One end of the columnar base body is provided with a cylindrical groove, and an annular shielding groove is provided in the cylindrical groove. The other end of the columnar base body is connected with a cylindrical boss, and the outer diameter of the cylindrical boss is the same as the inner diameter of the annular shielding groove. One end of the cylindrical boss away from the columnar base body is connected with a shielding cylinder, and the center lines of the annular shielding groove, the cylindrical boss, the shielding cylinder and the columnar base body coincide. On the end face area between the annular shielding groove and the inner wall of the cylindrical groove, a plurality of outer conductor core pin holes penetrating through to the other end face of the columnar base body are provided, and outer conductor core pins extending out of the outer conductor core pin holes at both ends are assembled in the outer conductor core pin holes. On the end face of the middle part of the annular shielding groove, a plurality of inner conductor core pin holes penetrating through to the end face of the cylindrical boss are provided, and inner conductor core pins extending out of the inner conductor core pin holes at both ends are assembled in the inner conductor core pin holes.

[0007] Further, a first insulating glass and a first insulating ceramic are sealed between the outer conductor core pin and the corresponding outer conductor core pin hole, and the first insulating ceramic is sealed at positions close to both ends of the outer conductor core pin hole, and the first insulating glass is sealed between the two first insulating ceramics.

[0008] Further, the first insulating ceramic extends 1 mm to 3 mm out of the corresponding outer conductor core pin hole.

[0009] Further, the first insulating glass adopts a lead-free insulating water-resistant sealing glass, and the outer conductor core pin adopts a non-magnetic high-temperature alloy.

[0010] Further, a second insulating glass and a second insulating ceramic are sealed between the inner conductor core pin and the corresponding inner conductor core pin hole, and the second insulating ceramic is sealed at positions close to both ends of the inner conductor core pin hole, and the second insulating glass is sealed between the two second insulating ceramics.

[0011] Further, the second insulating ceramic extends 1 mm to 3 mm out of the corresponding inner conductor core pin hole.

[0012] Further, the second insulating glass adopts a lead-free insulating water-resistant sealing glass, and the inner conductor core pin adopts a non-magnetic high-temperature alloy.

[0013] Further, an annular groove is provided on the outer cylindrical surface of the columnar base body, and the annular groove is used for accommodating a sealing ring.

[0014] Further, the outer conductor core pin holes are arranged in an annular array around the central axis of the columnar base body.

[0015] Further, both the columnar base body and the cylindrical boss adopt non-magnetic high-temperature alloys.

[0016] Compared with the prior art, the utility model has at least the following beneficial effects:

[0017] A pressure-bearing coaxial electrical connector for a petroleum logging instrument provided by the utility model solves the problem that the shielding function is not fully considered in the structural design of the pressure-bearing coaxial electrical connector. An annular shielding groove is opened in the cylindrical groove of the cylindrical base body, enhancing the shielding performance of the connector. The annular shielding groove, the cylindrical boss, and the shielding cylinder together form a complete shielding structure, which can effectively isolate electromagnetic interference and protect the stability of internal signal transmission. The center lines of the annular shielding groove, the cylindrical boss, the shielding cylinder, and the cylindrical base body coincide, ensuring the linearity and consistency of the signal transmission path, reducing the reflection and attenuation of the signal during transmission, and improving the efficiency and quality of signal transmission. Since this electrical connector reduces electromagnetic interference and signal attenuation during signal transmission, it can improve the quality of logging data, which is very crucial for petroleum logging instruments operating under well conditions with high-frequency signal transmission and complex electromagnetic environments.

[0018] In order to make the above-mentioned objects, features, and advantages of the utility model more obvious and understandable, the following specifically enumerates preferred embodiments and, in conjunction with the accompanying drawings, makes the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the specific embodiments of the utility model, the following will briefly introduce the drawings required for use in the description of the specific embodiments. Obviously, the following drawings are some embodiments of the utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 An isometric view of a pressure-bearing coaxial electrical connector for a petroleum logging instrument of the utility model from the first perspective;

[0021] Figure 2 An isometric view of a pressure-bearing coaxial electrical connector for a petroleum logging instrument of the utility model from the second perspective;

[0022] Figure 3 A sectional view of a pressure-bearing coaxial electrical connector for a petroleum logging instrument of the utility model;

[0023] Figure 4 A left view of a pressure-bearing coaxial electrical connector for a petroleum logging instrument of the utility model;

[0024] Figure 5 A right view of a pressure-bearing coaxial electrical connector for a petroleum logging instrument of the utility model.

[0025] In the figure: 1 - columnar base; 2 - cylindrical groove; 3 - annular shielding groove; 4 - cylindrical boss; 5 - shielding cylinder; 6 - outer conductor core pin; 7 - inner conductor core pin; 8 - first insulating glass; 9 - first insulating ceramic; 10 - second insulating glass; 11 - second insulating ceramic; 12 - annular groove. Specific implementation manner

[0026] To make the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0027] Combined with Figures 1 to 5 As shown, the embodiment of the present utility model provides a pressure-bearing coaxial electrical connector for a petroleum logging instrument. On the basis of ensuring the pressure-bearing capacity and signal transmission continuity, the shielding function of the connector is enhanced to meet the working requirements under high-frequency signal transmission and complex electromagnetic environments. The pressure-bearing coaxial electrical connector includes a columnar base 1. One end of the columnar base 1 is provided with a cylindrical groove 2, and an annular shielding groove 3 is provided in the cylindrical groove 2. The other end of the columnar base 1 is connected with a cylindrical boss 4. The outer diameter of the cylindrical boss 4 is the same as the inner diameter of the annular shielding groove 3. One end of the cylindrical boss 4 away from the columnar base 1 is connected with a shielding cylinder 5. The center lines of the annular shielding groove 3, the cylindrical boss 4, the shielding cylinder 5 and the columnar base 1 coincide. A plurality of outer conductor core pin holes penetrating to the other end face of the columnar base 1 are provided in the end face area between the annular shielding groove 3 and the inner wall of the cylindrical groove 2, and outer conductor core pins 6 with both ends extending out of the outer conductor core pin holes are assembled in the outer conductor core pin holes. A plurality of inner conductor core pin holes penetrating to the end face of the cylindrical boss 4 are provided in the middle part of the end face of the annular shielding groove 3, and inner conductor core pins 7 with both ends extending out of the inner conductor core pin holes are assembled in the inner conductor core pin holes.

[0028] Specifically, the columnar base body 1 is designed to be cylindrical, and a cylindrical groove 2 is machined at one end thereof. Exemplarily, the columnar base body 1 is made of an alloy material with high strength, high temperature resistance, and corrosion resistance to ensure stability and durability in the harsh downhole environment (high temperature and high pressure). An annular shielding groove 3 is provided in the cylindrical groove 2, and the annular shielding groove 3 forms an effective electromagnetic shielding layer. A cylindrical boss 4 is machined at the other end of the columnar base body 1, and its outer diameter is the same as the inner diameter of the annular shielding groove 3. One end of the cylindrical boss 4 away from the columnar base body 1 is connected to a shielding cylinder 5, and the shielding cylinder 5 is made of a metal material with excellent electrical conductivity to expand the shielding range and effectively block electromagnetic interference. Ensuring that the center lines of the annular shielding groove 3, the cylindrical boss 4, the shielding cylinder 5, and the columnar base body 1 completely coincide helps to improve the structural stability. In the end face area between the annular shielding groove 3 and the inner wall of the cylindrical groove 2, a number of outer conductor core pin holes are drilled according to the design layout to ensure that the outer conductor core pins 6 can be stably installed and effectively conduct signals. The outer conductor core pins 6 are made of a material with high conductivity, and both ends extend out of the outer conductor core pin holes. A number of inner conductor core pin holes are provided on the end face of the middle part of the annular shielding groove 3, and the inner conductor core pins 7 are also made of a material with high conductivity, and both ends extend out of the inner conductor core pin holes.

[0029] Through the above embodiments, a pressure-bearing coaxial electrical connector with a compact structure, excellent performance, and good shielding function is provided, which can meet the high requirements of oil well logging instruments in high-frequency signal transmission and complex electromagnetic environments.

[0030] In an implementable manner, as Figure 3 shown, a first insulating glass 8 and a first insulating ceramic 9 are sealed between the outer conductor core pin 6 and the corresponding outer conductor core pin hole, and the first insulating ceramic 9 is sealed at positions close to both ends of the outer conductor core pin hole, and the first insulating glass 8 is sealed between the two first insulating ceramics 9.

[0031] Specifically, between the outer conductor core pin 6 and the corresponding outer conductor core pin hole, the first insulating glass 8 is used for sealing. The first insulating glass 8 has good insulation performance and high temperature stability, and can effectively isolate the electrical connection between the outer conductor core pin 6 and the columnar base body 1 to prevent signal leakage or short circuit. At the same time, the first insulating glass 8 can also provide certain mechanical support to enhance the stability of the outer conductor core pin 6. To further improve the insulation effect and corrosion resistance, first insulating ceramics 9 are respectively sealed on both sides of the first insulating glass 8, that is, at positions close to both ends of the outer conductor core pin hole. The first insulating ceramic 9 not only has excellent insulation performance, but also can resist chemical corrosion in the harsh downhole environment and extend the service life of the connector. In addition, the first insulating ceramic 9 has a higher hardness and can play a certain protective role for the outer conductor core pin 6 to prevent it from being damaged during operation.

[0032] In this embodiment, the insulation encapsulation between the outer conductor core pin 6 and the outer conductor core pin hole is strengthened. The double insulation structure not only improves the insulation performance of the connector, but also enhances its corrosion resistance and mechanical strength, providing a reliable guarantee for the stable operation of the oil logging instrument in the harsh downhole environment.

[0033] Preferably, as Figure 3 shown, in order to more effectively prevent turbid substances (such as mud, sand particles, moisture, etc.) in the downhole environment from accumulating on the surface of the core pin, which may affect the insulation performance and even cause a short circuit, the first insulating ceramic 9 is designed to protrude 1 mm to 3 mm out of the corresponding outer conductor core pin hole. If turbid substances accumulate for a long time, they will penetrate or corrode the insulating material, reducing the insulation performance. Therefore, by appropriately increasing the protruding length of the insulating ceramic, this risk can be reduced.

[0034] Preferably, the first insulating glass 8 uses lead-free insulating water-resistant sealing glass, and the outer conductor core pin 6 uses non-magnetic high-temperature alloy. Specifically, the first insulating glass 8 uses lead-free insulating water-resistant sealing glass. This glass material not only has excellent insulation performance, but also has good water resistance. Its thermal expansion coefficient is similar to that of the material of the selected outer conductor core pin 6, which can better ensure the sealing performance of the seal. The outer conductor core pin 6 uses non-magnetic high-temperature alloy, and specific models such as X-718 or X-750 can be selected. These alloy materials have the characteristics of high strength, high temperature resistance and non-magnetism, and are suitable for use in occasions such as oil logging instruments that need to withstand high temperature, high pressure and require signal transmission not to be interfered by magnetic fields. Their thermal expansion coefficients are similar to those of lead-free insulating water-resistant sealing glass, which enables the two materials to better match during the sealing process. During the sealing process, both can maintain a relatively consistent expansion or contraction trend with the change of temperature, reducing the stress caused by thermal expansion differences, thereby improving the sealing performance and stability of the seal, enabling the electrical connector to work stably at a temperature of up to 260 °C and a pressure of 210 MPa, meeting the requirements of oil logging instruments.

[0035] In an implementable manner, as Figure 3As shown, a second insulating glass 10 and a second insulating ceramic 11 are sealed between the inner conductor core pin 7 and the corresponding inner conductor core pin hole. The second insulating ceramic 11 is sealed at positions near both ends of the inner conductor core pin hole, and the second insulating glass 10 is sealed between the two second insulating ceramics 11. Similarly, the second insulating glass 10 is used for sealing between the inner conductor core pin 7 and the corresponding inner conductor core pin hole. Similar to the first insulating glass 8, the second insulating glass 10 also has excellent insulation performance and high-temperature stability, can effectively isolate the electrical connection between the inner conductor core pin 7 and the columnar base 1, and prevent signal leakage or short circuit. At the same time, it can also provide a certain mechanical support to enhance the stability of the inner conductor core pin 7. To further enhance the insulation effect, second insulating ceramics 11 are respectively sealed on both sides of the second insulating glass 10, that is, at positions near both ends of the inner conductor core pin hole. The second insulating ceramic 11 also has insulation performance and corrosion resistance, and can effectively block the erosion of the inner conductor core pin 7 by the turbid substances and corrosive media in the downhole environment.

[0036] Preferably, as Figure 3 shown, the second insulating ceramic 11 extends 1 mm to 3 mm out of the corresponding inner conductor core pin hole. It can effectively prevent turbid substances (such as mud, sand grains, moisture, etc.) in the downhole environment from accumulating on the inner conductor core pin 7, and solve the problems of decreased insulation performance or short-circuit risk.

[0037] Preferably, the second insulating glass 10 also uses a lead-free insulating and water-resistant sealing glass, and the inner conductor core pin 7 uses a non-magnetic high-temperature alloy. The non-magnetic high-temperature alloy can specifically be selected from models such as X-718 or X-750. The lead-free insulating and water-resistant sealing glass and the non-magnetic high-temperature alloy can maintain a relatively consistent expansion or contraction trend with the change of temperature, reduce the stress generated due to thermal expansion differences, thereby improving the sealing performance and stability of the seal, enabling the electrical connector to work stably at a temperature of up to 260 °C and a pressure of 210 MPa, meeting the requirements of oil well logging instruments.

[0038] In an embodiment, as Figure 1 and Figure 3 shown, an annular groove 12 is provided on the outer cylindrical surface of the columnar base 1. The annular groove 12 is used to accommodate the sealing ring. Specifically, the annular groove 12 is provided on the outer cylindrical surface of the columnar base 1, and its position should be selected in an area that can be closely attached and effectively sealed. The depth and width of the groove need to be determined according to the size and compression amount of the selected sealing ring to ensure that the sealing ring can be completely embedded in the groove and be properly compressed, so as to achieve the sealing effect.

[0039] In one embodiment, the outer conductor core pin holes are arranged in an annular array around the central axis of the columnar base body 1. By designing the outer conductor core pin holes in the form of an annular array, simultaneous transmission of multiple signal channels can be achieved, which is suitable for occasions where oil logging needs to collect and transmit various logging parameters, effectively improving the logging efficiency. The annular array arrangement can make full use of the circumferential space of the columnar base body 1, enabling more signal channels to be arranged within a limited volume, not only reducing the overall size of the connector, but also improving the integration and portability of the device.

[0040] In one embodiment, both the columnar base body 1 and the columnar boss 4 are made of non-magnetic superalloy. The use of non-magnetic superalloy can ensure that the connector will not interfere with the surrounding magnetic field during logging and will not be affected by external magnetic fields, thus ensuring the reliability of logging data. Exemplarily, the columnar base body 1 and the columnar boss 4 are made of non-magnetic superalloy X-750 or P550. X-750 high-temperature non-magnetic alloy is a nickel-based high-temperature alloy with high strength, good oxidation and corrosion resistance, as well as excellent hot working performance and welding performance. P550 high-temperature non-magnetic alloy is also a high-performance non-magnetic superalloy with excellent properties similar to those of X-750, and is suitable for occasions requiring high strength, high corrosion resistance and non-magnetism.

[0041] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0042] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0043] In the present invention, unless otherwise clearly specified and limited, the terms "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection, an electrical connection or communication with each other; it can be directly connected, or indirectly connected through an intermediate medium, and can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In the present utility model, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0045] In the present utility model, the terms "an embodiment", "some embodiments", "example", "specific example", or "some examples", etc. mean that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0046] Finally, it should be noted that the above-described embodiments are only specific embodiments of the present utility model, used to illustrate the technical solutions of the present utility model, rather than limiting it. The protection scope of the present utility model is not limited thereto. Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: any person skilled in the art within the technical scope disclosed by the present utility model can still modify the technical solutions recorded in the foregoing embodiments or can easily think of changes, or make equivalent replacements for some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model, and should all be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A pressure-bearing coaxial electrical connector for petroleum logging instruments, characterized in that: The invention comprises a columnar base (1), one end of the columnar base (1) is provided with a columnar groove (2), an annular shielding groove (3) is provided in the columnar groove (2), the other end of the columnar base (1) is connected with a columnar boss (4), the outer diameter of the columnar boss (4) is the same as the inner diameter of the annular shielding groove (3), the end of the columnar boss (4) away from the columnar base (1) is connected with a shielding cylinder (5), the center line of the annular shielding groove (3), the center line of the columnar boss (4), the center line of the shielding cylinder (5) and the center line of the annular shielding groove (3) are connected to ... The center lines of the columnar base (1) coincide with each other; a plurality of outer conductor core pinholes are provided on the end face area between the annular shielding groove (3) and the inner wall of the cylindrical groove (2) and penetrate to the other end face of the columnar base (1); the outer conductor core pinholes are equipped with outer conductor core pinholes (6) with both ends extending out of the outer conductor core pinholes; a plurality of inner conductor core pinholes are provided on the end face of the middle part of the annular shielding groove (3) and penetrate to the end face of the cylindrical boss (4); the inner conductor core pinholes are equipped with inner conductor core pinholes with both ends extending out of the inner conductor core pinholes.

2. A pressure-bearing coaxial electrical connector for petroleum logging instruments according to claim 1, characterized in that: A first insulating glass (8) and a first insulating ceramic (9) are sealed between the outer conductor core needle (6) and the corresponding outer conductor core needle hole, and the first insulating ceramic (9) is sealed at a position close to both ends of the outer conductor core needle hole, and the first insulating glass (8) is sealed between two of the first insulating ceramics (9).

3. A pressure-bearing coaxial electrical connector for petroleum logging instruments according to claim 2, characterized in that: The first insulating ceramic (9) extends out of the corresponding outer conductor core pinhole by 1 mm to 3 mm.

4. A pressure-bearing coaxial electrical connector for petroleum logging instruments according to claim 3, characterized in that: The first insulating glass (8) is made of lead-free insulating water-resistant sealing glass, and the outer conductor core needle (6) is made of non-magnetic high-temperature alloy.

5. A pressure-bearing coaxial electrical connector for petroleum logging instruments according to claim 1, characterized in that: A second insulating glass (10) and a second insulating ceramic (11) are sealed between the inner conductor core needle (7) and the corresponding inner conductor core needle hole, and the second insulating ceramic (11) is sealed at a position close to both ends of the inner conductor core needle hole, and the second insulating glass (10) is sealed between two of the second insulating ceramics (11).

6. A pressure-bearing coaxial electrical connector for petroleum logging instruments according to claim 5, characterized in that: The second insulating ceramic (11) extends out of the corresponding inner conductor core pinhole by 1 mm to 3 mm.

7. A pressure-bearing coaxial electrical connector for petroleum logging instruments according to claim 6, characterized in that: The second insulating glass (10) is made of lead-free insulating water-resistant sealing glass, and the inner conductor core needle (7) is made of non-magnetic high-temperature alloy.

8. A pressure-bearing coaxial electrical connector for petroleum logging instruments according to claim 1, characterized in that: An annular groove (12) is provided on the outer cylindrical surface of the columnar base (1), and the annular groove (12) is used to accommodate a sealing ring.

9. A pressure-bearing coaxial electrical connector for petroleum logging instruments according to claim 1, characterized in that: The outer conductor core pinholes are arranged in a ring array around the central axis of the columnar base (1).

10. A pressure-bearing coaxial electrical connector for petroleum logging instruments according to claim 1, characterized in that: The columnar base (1) and the columnar boss (4) are both made of non-magnetic high-temperature alloy.

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