Downhole instrument butt joint communication short section mechanism and downhole instrument

Abstract

The utility model relates to the technical field of drilling equipment, and discloses a downhole instrument butt joint communication short section mechanism and a downhole instrument. The runner body comprises an annular part and a cantilever part, the cantilever part comprises an inclined section and a linear section, the linear section is connected to the annular part through the inclined section and is coaxial with the axis of the annular part, and the end, away from the cantilever part, of the annular part is used for being connected with an upper-end instrument; the circuit communication assembly is connected to the end face of the linear segment. A connecting groove is formed in the first end of the compression-resistant cylinder, a second channel is formed in the groove bottom of the connecting groove, the circuit communication assembly is located in the connecting groove, and the connecting groove is connected to the linear section in a sealed mode; the multi-core aviation plug connector is connected to the second end of the compression-resistant cylinder; a socket is installed at the end, away from the cantilever part, of the annular part, a first channel is formed in the flow channel body, and the socket and the circuit communication assembly are connected through a wire penetrating through the first channel. The circuit communication assembly is connected through a wire penetrating through the second channel. The structure is shorter and smaller, and the reliability of the structure is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of drilling equipment, in particular to a downhole instrument docking communication short joint mechanism and a downhole instrument. Background Art

[0002] During the development of oil and gas, measurement-while-drilling (MWD) instruments are essential equipment. Currently, commonly used downhole instrument communication interfaces require a dedicated drill collar for communication conversion. This results in a relatively large overall structure, and the drill collar structure has two additional threaded collars for connection. This increased number of threads increases the risk of weakening the MWD instrument's structure underground, potentially causing deformation or breakage. Furthermore, existing technologies employ dual or multiple support rib flow channels, which encroach on the mud flow space and reduce mud flow efficiency.

[0003] Furthermore, in the prior art, a central hole for circulating mud is provided inside the flow channel body, the drill collar and the pressure-resistant tube, and a sleeve is provided on the outside of the flow channel body, the drill collar and the pressure-resistant tube. A gap is provided between the drill collar and the sleeve, and the gap is used to set a communication short section. When the communication short section needs to be maintained, the sleeve needs to be removed for maintenance or replacement of the communication short section, which is cumbersome to operate.

[0004] Based on this, there is an urgent need for a downhole instrument docking communication short section mechanism and a downhole instrument to solve the above-mentioned problems. Utility Model Content

[0005] Based on the above, the purpose of the present invention is to provide a downhole instrument docking communication short section mechanism and a downhole instrument, so as to make the structure shorter and more compact, thereby improving the reliability of the overall structure.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] In a first aspect, a downhole instrument docking communication sub mechanism is provided, comprising:

[0008] The flow channel body includes an annular portion and a cantilever portion, the cantilever portion includes an inclined section and a straight section, the straight section is connected to the annular portion via the inclined section, and the straight section is coaxial with the axis of the annular portion, and the end of the annular portion away from the cantilever portion is used to connect to the upper end instrument;

[0009] a circuit communication component connected to an end face of the straight segment;

[0010] A compression-resistant cylinder, wherein a connecting groove is provided at a first end of the compression-resistant cylinder, a second channel is provided at a bottom of the connecting groove, the circuit communication component is located in the connecting groove, and the connecting groove is sealed and connected to the straight segment;

[0011] A multi-core aviation plug connector connected to the second end of the pressure-resistant cylinder;

[0012] A socket is installed at one end of the annular portion away from the cantilever portion, and a first channel is provided in the flow channel body. The socket and the circuit communication component are connected through a wire passing through the first channel; the circuit communication component is connected through a wire passing through the second channel.

[0013] As an optimal technical solution for a downhole instrument docking communication short section mechanism, the first channel includes a first wiring hole, an inclined wiring hole, and a second wiring hole that are connected in sequence. The first wiring hole is located in the annular portion, the inclined wiring hole is arranged in the inclined section, and the second wiring hole is located in the straight section. The socket is installed at the end of the first wiring hole away from the inclined wiring hole.

[0014] As an optimal technical solution for a downhole instrument docking communication short section mechanism, the connecting groove includes a sealing section and a threaded section. The sealing section is located on the side of the threaded section away from the bottom of the connecting groove. A first sealing ring is provided between the sealing section and the straight section, and the threaded section is threadedly connected to the straight section.

[0015] As an optimal technical solution for a downhole instrument docking communication short section mechanism, the circuit communication assembly includes a circuit skeleton and a circuit board. The circuit skeleton is detachably connected to the end face of the straight segment, and the circuit board is mounted on the circuit skeleton.

[0016] As an optimal technical solution for a downhole instrument docking communication short section mechanism, the circuit skeleton includes a first connecting block, a mounting plate and a second connecting block connected in sequence, the first connecting block is connected to the end face of the straight segment, the first connecting block is provided with an inlet hole connected to the first channel, and the second connecting block is provided with an outlet hole connected to the second channel; wire holes are provided at both ends of the mounting plate, and the two wire holes are respectively connected to the inlet hole and the outlet hole.

[0017] As an optimal technical solution for a downhole instrument docking communication nipple mechanism, a disc spring is provided between the second connecting block and the bottom of the connecting groove.

[0018] As an optimal technical solution for a downhole instrument docking communication short section mechanism, the outer wall shape of the first connecting block and the second connecting block matches the inner wall shape of the connecting groove, and the first connecting block and the second connecting block are sealed to the inner wall of the connecting groove.

[0019] As an optimal technical solution for a downhole instrument docking communication nipple mechanism, the circuit communication assembly further includes a thermal pad, which is disposed between the circuit board and the mounting plate.

[0020] As an optimal technical solution for a downhole instrument docking communication short section mechanism, the circuit communication component also includes two pressure strips, which are installed at both ends of the circuit board along the first direction. The pressure strips extend along the second direction. Two countersunk holes are arranged on the pressure strips along the second direction at intervals. The circuit board is provided with a through hole, and the mounting plate is provided with a threaded hole. The countersunk holes, the through holes and the threaded holes correspond one to one, and the countersunk screws are passed through the countersunk holes and the through holes and are threadedly connected to the threaded holes.

[0021] As an optimal technical solution for connecting a downhole instrument to a communication nipple mechanism, a wiring gap is provided on a side of the pressure strip close to the circuit board, and the wiring gap is located between two countersunk holes.

[0022] As an optimal technical solution for a downhole instrument docking communication short section mechanism, the circuit communication component also includes two support bars, which are installed between the circuit board and the mounting plate at intervals along the first direction, and the support bars are bonded to the circuit board and the mounting plate.

[0023] In a second aspect, a downhole instrument is provided, comprising an upper instrument, a lower instrument, and a downhole instrument docking communication nipple mechanism as described in any one of the above, wherein the end of the annular portion facing away from the cantilever portion is connected to the upper instrument, and the socket is electrically connected to the upper instrument;

[0024] The second end of the pressure-resistant tube is connected to the lower end instrument, and the multi-core aviation plug connector is electrically connected to the lower end instrument.

[0025] The beneficial effects of the utility model are:

[0026] The present invention provides a downhole instrument docking communication short section mechanism and downhole instrument. In the working state, the end of the annular portion away from the cantilever portion is connected to the upper instrument, the middle of the annular portion is used to circulate mud, the socket is electrically connected to the upper instrument, and the multi-core aviation plug connector is connected to the lower instrument. The communication connection between the upper and lower instruments is achieved through the circuit communication component, and the function of converting the communication protocol between the upper and lower instruments is achieved. Compared with the existing technology, the flow channel body of the present invention is directly connected to the pressure-resistant cylinder. The overall structure is simpler, the drill collar structure is eliminated, and the risk of low downhole structural strength caused by multiple threaded buckles is solved. The downhole instrument docking communication short section mechanism is shorter and more compact, which improves the reliability of the overall structure.

[0027] Since the socket is not coaxial with the lower instrument, the utility model adjusts the position of the multi-core aviation plug connector by arranging the cantilever part so that the multi-core aviation plug connector is coaxial with the lower instrument, which facilitates the connection of the multi-core aviation plug connector with the lower instrument.

[0028] Furthermore, the present invention has only one cantilever portion, and compared with other structures with double-channel or multi-channel support rib flow channels, the mud flow channel has a larger space, ensuring smooth passage of mud.

[0029] Finally, in the utility model, the mud is directly discharged through the center of the annular portion and flows on the outer wall of the flow channel body and the pressure-resistant tube. There is no need to set a central hole for the flow of mud inside the flow channel body and the pressure-resistant tube, and there is no need to set a sleeve structure. The structure of the downhole instrument docking communication short section mechanism is simplified, and the volume of the downhole instrument docking communication short section mechanism is reduced. Moreover, when the communication short section fails, it is only necessary to repair or replace the flow channel body and the pressure-resistant tube, which is simple to operate and improves maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0031] Figure 1 This is a cross-sectional view of a downhole instrument docking communication sub mechanism provided by a specific embodiment of the utility model;

[0032] Figure 2 It is a cross-sectional view of the flow channel body provided by a specific embodiment of the present utility model;

[0033] Figure 3 It is an axonometric view of the flow channel body provided by the specific embodiment of the present utility model;

[0034] Figure 4 It is a cross-sectional view of a circuit communication assembly provided by a specific embodiment of the present utility model;

[0035] Figure 5 It is a top view of the circuit communication assembly provided by the specific embodiment of the present utility model.

[0036] The following are marked in the figure:

[0037] 1. Flow channel body; 11. Annular portion; 12. Cantilever portion; 121. Inclined section; 122. Straight section; 13. First channel; 131. First wiring hole; 132. Inclined wiring hole; 133. Second wiring hole; 14. Plug;

[0038] 2. Circuit communication assembly; 21. Circuit skeleton; 211. First connecting block; 2111. Wire entry hole; 212. Mounting plate; 2121. Wire threading hole; 213. Second connecting block; 2131. Wire exit hole; 22. Circuit board; 23. Disc spring; 24. Thermal pad; 25. Pressure strip; 251. Wire routing notch; 252. Countersunk hole; 26. Countersunk screw; 27. Support bar;

[0039] 3. Compression-resistant cylinder; 31. Connecting groove; 311. Sealing section; 312. Threaded section; 32. Second channel; 4. Multi-core aviation plug connector; 5. Socket; 6. First sealing ring; 7. Second sealing ring; 8. Positioning pin;

[0040] 9. Upper instrument. DETAILED DESCRIPTION

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0042] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0043] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0044] In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like, orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first" and "second" are only used to distinguish in the description, and have no special meaning.

[0045] As shown in Figure 1-Figure 3 The present embodiment provides a downhole instrument butt joint communication short section mechanism, which comprises a flow passage body 1, a circuit communication assembly 2, a pressure-resistant cylinder 3, and a multi-core navigation plug connector 4. Specifically, the flow passage body 1 comprises an annular part 11 and a cantilever part 12, the cantilever part 12 comprises an inclined section 121 and a straight section 122, the straight section 122 is connected to the annular part 11 through the inclined section 121, and the straight section 122 is coaxial with the axis of the annular part 11, and the end of the annular part 11 away from the cantilever part 12 is used for connecting an upper end instrument 9; the circuit communication assembly 2 is connected to the end face of the straight section 122; the first end of the pressure-resistant cylinder 3 is provided with a connecting groove 31, the groove bottom of the connecting groove 31 is provided with a second channel 32, the circuit communication assembly 2 is located in the connecting groove 31, and the connecting groove 31 is sealingly connected to the straight section 122; the multi-core navigation plug connector 4 is connected to the second end of the pressure-resistant cylinder 3; the end of the annular part 11 away from the cantilever part 12 is provided with a socket 5, the flow passage body 1 is provided with a first channel 13, and the socket 5 and the circuit communication assembly 2 are connected through wires passing through the first channel 13; the circuit communication assembly 2 is connected through wires passing through the second channel 32.

[0046] In the working state, the end of the annular portion 11 away from the cantilever portion 12 is connected to the upper instrument 9, the middle of the annular portion 11 is used to circulate mud, the socket 5 is electrically connected to the upper instrument 9, and the multi-core aviation plug connector 4 is connected to the lower instrument. The communication connection between the upper instrument 9 and the lower instrument is realized through the circuit communication component 2, and the function of converting the communication protocol between the upper instrument 9 and the lower instrument is realized. In this embodiment, the flow channel body 1 is directly connected to the pressure-resistant cylinder 3. Compared with the existing technology, the overall structure is simpler, the drill collar structure is eliminated, and the risk of low downhole structural strength caused by multiple threaded buckles is solved. The downhole instrument docking communication short section mechanism is shorter and more compact, which improves the reliability of the overall structure. Since the socket 5 is not coaxial with the lower instrument, this embodiment adjusts the position of the multi-core aviation plug connector 4 by setting the cantilever portion 12 to make the multi-core aviation plug connector 4 coaxial with the lower instrument, which facilitates the connection of the multi-core aviation plug connector 4 with the lower instrument. Furthermore, in this embodiment, there is only one cantilever portion 12, and the mud flowing out of the middle of the annular portion 11 continues to flow from the outside of the flow channel body 1. Compared with other double-channel or multi-channel support rib flow channel structures, the mud flow channel has a larger space, ensuring the smooth passage of mud. Finally, in this embodiment, the mud is discharged directly from the center of the annular portion 11. There is no need to set a central hole for the flow of mud inside the flow channel body 1 and the pressure-resistant tube 3, and there is no need to set a sleeve structure, which simplifies the structure of the downhole instrument docking communication short section mechanism and reduces the volume of the downhole instrument docking communication short section mechanism. Moreover, when the communication short section fails, only the flow channel body 1 and the pressure-resistant tube 3 need to be repaired or replaced, which is simple to operate and improves maintenance efficiency.

[0047] Furthermore, the first channel 13 includes a first wiring hole 131, an inclined wiring hole 132, and a second wiring hole 133, which are connected in sequence. The first wiring hole 131 is located within the annular portion 11, the inclined wiring hole 132 is provided within the inclined section 121, and the second wiring hole 133 is located within the straight section 122. The end of the first wiring hole 131 away from the inclined wiring hole 132 is mounted with a socket 5. Due to manufacturing requirements, the end of the inclined wiring hole 132 away from the second wiring hole 133 penetrates the outer wall of the annular portion 11. Therefore, a plug 14 is mounted on the end of the inclined wiring hole 132 away from the second wiring hole 133 to seal it. The external fastening and sealing is achieved by argon arc welding. In this embodiment, the socket 5 is a single-core connection socket 5.

[0048] The outer wall of the annular part 11 is stepped, including a large-diameter section, a stepped surface, and a small-diameter section. The small-diameter section is matched with the inner hole of the upper-end instrument 9. A sealing ring is arranged between the end surface of the small-diameter section and the upper-end instrument 9. The first wire hole 131 is located on the stepped surface. The socket 5 can be connected to the first wire hole 131 through threads. A sealing ring is arranged between the socket 5 and the inner wall of the first wire hole 131 to achieve sealing. The stepped surface is provided with a first positioning pin 8 hole at a position symmetrical to the first wire hole 131. The upper-end instrument 9 is provided with a corresponding second positioning pin 8 hole. The positioning pin 8 is installed in the first positioning pin 8 hole and the second positioning pin 8 hole in an interference fit, limiting the position, and improving the connection accuracy of the upper-end instrument 9 and the flow passage body 1. The large-diameter section and the upper-end instrument 9 are fixed by four screws, realizing the connection of the upper-end instrument 9 and the flow passage body 1.

[0049] Further, the connecting groove 31 includes a sealing section 311 and a threaded section 312. The sealing section 311 is located on the side of the threaded section 312 away from the groove bottom of the connecting groove 31. A first sealing ring 6 is arranged between the sealing section 311 and the straight section 122. The threaded section 312 is threadedly connected to the straight section 122. When the pressure cylinder 3 is connected to the straight section 122, the pressure cylinder 3 is threadedly connected to the straight section 122, realizing the fixation between the pressure cylinder 3 and the straight section 122. The first sealing ring 6 realizes the sealing between the pressure cylinder 3 and the straight section 122. In this embodiment, the multi-core aviation plug connector 4 can be connected to the end surface of the end of the pressure cylinder 3 away from the flow passage body 1 through screws. The end of the pressure cylinder 3 away from the flow passage body 1 is provided with a male thread for threadedly connecting and fixing with a downhole lower-end instrument. A sealing ring is arranged between the end of the pressure cylinder 3 away from the flow passage body 1 and the lower-end instrument to achieve sealing.

[0050] Further, as shown in Figure 1 , Figure 4 and Figure 5As shown, the circuit communication assembly 2 includes a circuit skeleton 21 and a circuit board 22. The circuit skeleton 21 is detachably connected to the end face of the straight segment 122, and the circuit board 22 is mounted on the circuit skeleton 21. The circuit skeleton 21 includes a first connecting block 211, a mounting plate 212, and a second connecting block 213, which are sequentially connected. The first connecting block 211 is connected to the end face of the straight segment 122. The first connecting block 211 is provided with an inlet hole 2111 that communicates with the first channel 13, and the second connecting block 213 is provided with an outlet hole 2131 that communicates with the second channel 32. The mounting plate 212 is provided with wire holes 2121 at both ends, and the two wire holes 2121 respectively connect to the inlet hole 2111 and the outlet hole 2131. In this embodiment, the first connection block 211, the mounting plate 212, and the second connection block 213 are integrally formed. The first connection block 211 can be connected to the end surface of the straight section 122 using four screws. The wires in the first channel 13 can pass through the wire entry hole 2111 and the wire through hole 2121 and connect to the circuit board 22. The wires of the circuit board 22 can pass through the wire through hole 2121, the wire exit hole 2131, and the second channel 32 to connect to the multi-core aviation plug connector 4. In other embodiments, the circuit board 22 can be mounted on both sides of the mounting plate 212.

[0051] Preferably, a disc spring 23 is provided between the second connecting block 213 and the bottom of the connecting slot 31 to prevent the circuit communication component 2 from shaking in the connecting slot 31 , thereby improving the installation stability of the circuit communication component 2 .

[0052] Preferably, the outer wall shape of the first connecting block 211 and the second connecting block 213 matches the inner wall shape of the connecting groove 31, and the first connecting block 211 and the second connecting block 213 are sealed to the inner wall of the connecting groove 31. In this embodiment, a second sealing ring 7 is provided between the first connecting block 211 and the second connecting block 213 and the inner wall of the connecting groove 31 to achieve a seal between the first connecting block 211 and the second connecting block 213 and the inner wall of the connecting groove 31.

[0053] Preferably, the circuit communication assembly 2 further includes a thermal pad 24 disposed between the circuit board 22 and the mounting plate 212. The thermal pad 24 reduces the thermal resistance between the circuit board 22 and the circuit frame 21, thereby improving the heat dissipation performance of the circuit board 22. In this embodiment, the thermal pad 24 is a thermally conductive silicone gasket, which is adhered to the empty space at the bottom end of the circuit processing board.

[0054] Further preferably, the circuit communication assembly 2 also includes two pressure strips 25, which are installed at both ends of the circuit board 22 along the first direction. The pressure strips 25 extend along the second direction. Two countersunk holes 252 are spaced apart along the second direction on the pressure strips 25. The circuit board 22 is provided with a through hole, and the mounting plate 212 is provided with a threaded hole. The countersunk holes 252, the through hole, and the threaded hole correspond one to one. Countersunk screws 26 are inserted through the countersunk holes 252 and the through hole and are threadedly connected to the threaded hole, thereby achieving the installation of the circuit board 22 on the mounting plate 212. By providing the pressure strips 25 to press the circuit board 22, the force-bearing area of ​​the circuit board 22 is increased, and the installation stability of the circuit board 22 is improved. During assembly, the pressure strips 25 can be fixed to the upper end of the circuit board 22 using instant adhesive to ensure that the hole positions correspond. In this embodiment, the first direction is X and the second direction is Y. The first direction is perpendicular to the second direction and extends along the axis of the annular portion 11.

[0055] Further preferably, a wiring notch 251 is provided on one side of the pressure strip 25 close to the circuit board 22 , and the wiring notch 251 is located between the two countersunk holes 252 . A wire can pass through the wiring notch 251 and be connected to the circuit board 22 .

[0056] Preferably, the circuit communication assembly 2 further includes two support bars 27, which are installed at intervals along the first direction between the circuit board 22 and the mounting plate 212. The support bars 27 increase the distance between the circuit board 22 and the mounting plate 212, preventing the pins on the circuit board 22 from directly contacting the mounting plate 212, thereby preventing damage to the circuit board 22.

[0057] In this embodiment, the flow channel body 1 is made of non-magnetic, highly corrosion-resistant stainless steel. The pressure-resistant cylinder 3 is made of a non-magnetic, highly corrosion-resistant, and high-strength nickel alloy. The support bar 27 is made of polyetheretherketone (PEEK), which has good insulation, high strength, and high temperature resistance.

[0058] like Figure 1-Figure 5 As shown, this embodiment also provides an assembly method for the downhole instrument docking communication short section mechanism, which is as follows:

[0059] The assembled circuit communication component 2 is fixed to the end face of the straight section 122 of the flow channel body 1 using four screws. The wires of the socket 5 on the flow channel body 1 are passed through the first channel 13 and butt-welded to the upper lead of the circuit communication component 2. The disc spring is then installed into the bottom of the connecting groove 31. The flow channel body 1 with the assembled circuit communication component 2 is installed into the pressure-resistant tube 3. The flow channel body 1 and the pressure-resistant tube 3 are threadedly connected and fixed, and the circuit communication component 2 compresses the disc spring 23. The wires at the lower end of the circuit board 22 are led out from the second channel 32 of the pressure-resistant tube 3 and welded to the multi-core aviation plug connector 4. The multi-core aviation plug connector 4 is fixed to the end face of the pressure-resistant tube 3 using four screws.

[0060] This embodiment also provides a downhole instrument, including an upper instrument 9, a lower instrument and the above-mentioned downhole instrument docking communication short section mechanism, the end of the annular portion 11 facing away from the cantilever portion 12 is connected to the upper instrument 9, and the socket 5 is electrically connected to the upper instrument 9; the second end of the pressure-resistant tube 3 is connected to the lower instrument, and the multi-core aviation plug connector 4 is electrically connected to the lower instrument.

[0061] Note that the above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, while the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A downhole instrument docking communication short joint mechanism, characterized in that: include: A flow channel body (1) comprises an annular portion (11) and a cantilever portion (12), wherein the cantilever portion (12) comprises an inclined section (121) and a straight section (122), wherein the straight section (122) is connected to the annular portion (11) via the inclined section (121), and the straight section (122) is coaxial with the axis of the annular portion (11), and an end of the annular portion (11) facing away from the cantilever portion (12) is used for connecting to an upper end instrument (9); a circuit communication component (2), the circuit communication component (2) being connected to the end surface of the straight line segment (122); A pressure-resistant tube (3), wherein a connecting groove (31) is provided at a first end of the pressure-resistant tube (3), a second channel (32) is provided at a bottom of the connecting groove (31), the circuit communication component (2) is located in the connecting groove (31), and the connecting groove (31) is sealed and connected to the straight section (122); A multi-core aviation plug connector (4) connected to the second end of the pressure-resistant cylinder (3); A socket (5) is mounted on one end of the annular portion (11) facing away from the cantilever portion (12); a first channel (13) is provided in the flow channel body (1); the socket (5) and the circuit communication component (2) are connected via a wire passing through the first channel (13); and the circuit communication component (2) is connected via a wire passing through the second channel (32).

2. The downhole instrument docking communication sub mechanism according to claim 1, characterized in that: The first channel (13) comprises a first wiring hole (131), an inclined wiring hole (132) and a second wiring hole (133) which are connected in sequence, wherein the first wiring hole (131) is located in the annular portion (11), the inclined wiring hole (132) is arranged in the inclined section (121), and the second wiring hole (133) is located in the straight section (122). The socket (5) is installed at one end of the first wiring hole (131) away from the inclined wiring hole (132).

3. The downhole instrument docking communication sub mechanism according to claim 1, characterized in that: The connecting groove (31) comprises a sealing section (311) and a threaded section (312), wherein the sealing section (311) is located on a side of the threaded section (312) away from the groove bottom of the connecting groove (31), a first sealing ring (6) is provided between the sealing section (311) and the straight section (122), and the threaded section (312) is threadedly connected to the straight section (122).

4. The downhole instrument docking communication sub mechanism according to any one of claims 1 to 3, characterized in that: The circuit communication component (2) comprises a circuit skeleton (21) and a circuit board (22); the circuit skeleton (21) is detachably connected to the end face of the straight segment (122); and the circuit board (22) is mounted on the circuit skeleton (21).

5. The downhole instrument docking communication sub mechanism according to claim 4, characterized in that: The circuit skeleton (21) comprises a first connection block (211), a mounting plate (212), and a second connection block (213) connected in sequence, wherein the first connection block (211) is connected to the end face of the straight segment (122), the first connection block (211) is provided with an inlet hole (2111) communicating with the first channel (13), and the second connection block (213) is provided with an outlet hole (2131) communicating with the second channel (32); and wire holes (2121) are provided at both ends of the mounting plate (212), and the two wire holes (2121) are respectively connected to the inlet hole (2111) and the outlet hole (2131).

6. The downhole instrument docking communication sub mechanism according to claim 5, characterized in that: A disc spring (23) is provided between the second connecting block (213) and the bottom of the connecting groove (31).

7. The downhole instrument docking communication sub mechanism according to claim 5, characterized in that: The outer wall shapes of the first connecting block (211) and the second connecting block (213) match the inner wall shape of the connecting groove (31), and the first connecting block (211) and the second connecting block (213) are sealedly connected to the inner wall of the connecting groove (31).

8. The downhole instrument docking communication sub mechanism according to claim 5, characterized in that: The circuit communication assembly (2) further includes a thermal pad (24), which is disposed between the circuit board (22) and the mounting plate (212).

9. The downhole instrument docking communication sub mechanism according to claim 5, characterized in that: The circuit communication component (2) further comprises two pressure strips (25), the two pressure strips (25) being mounted on both ends of the circuit board (22) along a first direction, the pressure strips (25) extending along a second direction, two countersunk holes (252) being spaced apart along the second direction on the pressure strip (25), the circuit board (22) being provided with a through hole, the mounting plate (212) being provided with a threaded hole, the countersunk hole (252), the through hole and the threaded hole being in one-to-one correspondence, and the countersunk screw (26) being passed through the countersunk hole (252), the through hole and being threadedly connected to the threaded hole.

10. The downhole instrument docking communication sub mechanism according to claim 9, characterized in that: A wiring gap (251) is provided on one side of the pressure strip (25) close to the circuit board (22), and the wiring gap (251) is located between the two countersunk holes (252).

11. The downhole instrument docking communication sub mechanism according to claim 5, characterized in that: The circuit communication component (2) further includes two support bars (27), the two support bars (27) being installed between the circuit board (22) and the mounting plate (212) at intervals along a first direction, and the support bars (27) being bonded to the circuit board (22) and the mounting plate (212).

12. A downhole instrument, characterized in that: It comprises an upper instrument (9), a lower instrument and a downhole instrument docking communication short section mechanism according to any one of claims 1 to 11, wherein one end of the annular portion (11) facing away from the cantilever portion (12) is connected to the upper instrument (9), and the socket (5) is electrically connected to the upper instrument (9); The second end of the pressure-resistant cylinder (3) is connected to a lower-end instrument, and the multi-core aviation plug connector (4) is electrically connected to the lower-end instrument.

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