Downhole instrument butt joint communication short section mechanism and downhole instrument

Abstract

The invention 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 structural reliability is improved.

Description

Technical Field

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

[0002] In the process of oil and gas development, the measurement while drilling instrument is an indispensable measuring equipment in the drilling development process. At present, the commonly used structure for downhole instrument docking communication will be specially made into a communication conversion drill collar, the overall structure is relatively large, and the drill collar structure will have two more threaded buckles for the drill collar docking. The increase of threaded buckles makes the measurement while drilling instrument have the risk of weak structural strength underground, which is easy to cause deformation or breakage of the measurement while drilling instrument; furthermore, the existing technology adopts a double-channel or multi-channel support rib flow channel structure, and the multi-channel support ribs occupy the flow space of the mud, reducing the circulation efficiency of the mud.

[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 cylinder, a sleeve is sleeved on the outside of the flow channel body, the drill collar and the pressure-resistant cylinder, and a gap is provided between the drill collar and the sleeve. 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.

[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. Summary of the invention

[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] To achieve the above object, the present invention adopts the following technical solutions:

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

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

[0009] A circuit communication component connected to an end surface of the straight line 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 section;

[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, a first channel is provided in the flow channel body, the socket and the circuit communication component are connected via a wire passing through the first channel; the circuit communication component is connected via 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, the second wiring hole is located in the straight section, and the socket is installed at one 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 arranged 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 component 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 installed 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; both ends of the mounting plate are provided with threading holes, and the two threading holes are respectively connected to the inlet hole and the outlet hole.

[0017] As a preferred technical solution for a downhole instrument docking communication short section 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 and connected to the inner wall of the connecting groove.

[0019] As a preferred technical solution for a downhole instrument docking communication nipple mechanism, the circuit communication component 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, and the pressure strip extends along the second direction. Two countersunk holes are arranged on the pressure strip 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 hole, the through hole and the threaded hole correspond to each other one by one, and the countersunk screw is passed through the countersunk hole and the through hole and is threadedly connected to the threaded hole.

[0021] As a preferred technical solution for a downhole instrument docking communication short section 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 a preferred 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 end instrument, a lower end instrument and a downhole instrument docking communication short section mechanism as described in any one of the above items, wherein one end of the annular portion away from the cantilever portion is connected to the upper end instrument, and the socket is electrically connected to the upper end instrument;

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

[0025] The beneficial effects of the present invention are:

[0026] The present invention provides a downhole instrument docking communication short section mechanism and downhole instrument. In the working state, one end of the annular part away from the cantilever part is connected to the upper instrument, the middle of the annular part 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 instrument and the lower instrument is realized through the circuit communication component, and the function of communication protocol conversion between the upper instrument and the lower instrument is realized. In the present invention, the flow channel body is directly connected to the pressure-resistant cylinder. Compared with the prior art, the overall structure is simpler, the drill collar structure is omitted, 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 present invention 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 between the multi-core aviation plug connector and the lower instrument.

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

[0029] Finally, in the present invention, 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 cylinder. There is no need to set a central hole for the flow of mud inside the flow channel body and the pressure-resistant cylinder, 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, it is only necessary to repair or replace the flow channel body and the pressure-resistant cylinder, 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 briefly introduces 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 It is a cross-sectional view of a downhole instrument docking communication short section mechanism provided by a specific embodiment of the present invention;

[0032] Figure 2 is a cross-sectional view of a flow channel body provided in a specific embodiment of the present invention;

[0033] Figure 3 is an axonometric view of a flow channel body provided in a specific embodiment of the present invention;

[0034] Figure 4 is a cross-sectional view of a circuit communication assembly provided in a specific embodiment of the present invention;

[0035] Figure 5 It is a top view of a circuit communication component provided in a specific embodiment of the present invention.

[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 components; 21. Circuit skeleton; 211. First connection block; 2111. Wire inlet hole; 212. Mounting plate; 2121. Wire threading hole; 213. Second connection block; 2131. Wire outlet hole; 22. Circuit board; 23. Disc spring; 24. Thermal pad; 25. Pressure strip; 251. Wiring notch; 252. Countersunk hole; 26. Countersunk screw; 27. Support bar;

[0039] 3. Pressure-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 in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0042] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

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

[0044] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operate in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0045] like Figure 1-Figure 3 As shown, this embodiment provides a downhole instrument docking communication short section mechanism, which includes a flow channel body 1, a circuit communication component 2, a pressure-resistant tube 3 and a multi-core aviation plug connector 4. Specifically, the flow channel body 1 includes an annular portion 11 and a cantilever portion 12, the cantilever portion 12 includes an inclined section 121 and a straight section 122, the straight section 122 is connected to the annular portion 11 through the inclined section 121, and the straight section 122 is coaxial with the axis of the annular portion 11, and the end of the annular portion 11 away from the cantilever portion 12 is used to connect the upper end instrument 9; the circuit communication component 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, and the bottom of the connecting groove 31 is provided with a second channel 32, 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; the multi-core aviation plug connector 4 is connected to the second end of the pressure-resistant cylinder 3; a socket 5 is installed at the end of the annular portion 11 away from the cantilever portion 12, and a first channel 13 is provided in the flow channel body 1, and the socket 5 and the circuit communication component 2 are connected by a wire passed through the first channel 13; the circuit communication component 2 is connected by a wire passed 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 communication protocol conversion 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 prior art, the overall structure is simpler, the drill collar structure is omitted, 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, so that the multi-core aviation plug connector 4 is coaxial with the lower instrument, which is convenient for the multi-core aviation plug connector 4 to be connected to the lower instrument. Furthermore, in this embodiment, there is only one cantilever part 12, and the mud flowing out of the middle of the annular part 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 directly discharged from the center of the annular part 11, and 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, reduces the volume of the downhole instrument docking communication short section mechanism, and 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] Further, the first channel 13 includes a first wiring hole 131, an inclined wiring hole 132, and a second wiring hole 133 that are connected in sequence. 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 end of the first wiring hole 131 away from the inclined wiring hole 132 is installed with a socket 5. Among them, the end of the inclined wiring hole 132 away from the second wiring hole 133 penetrates the outer wall of the annular portion 11 due to process reasons. Therefore, the end of the inclined wiring hole 132 away from the second wiring hole 133 is installed with a plug 14 for blocking, and the outside is fixed and sealed by argon arc welding. In this embodiment, the socket 5 is a single-core connection socket 5.

[0048] In this embodiment, the outer wall of the annular portion 11 is stepped, including a large diameter section, a stepped surface and a small diameter section. The small diameter section cooperates with the inner hole of the upper instrument 9. A sealing ring is arranged between the end surface of the small diameter section and the upper instrument 9. The first wiring hole 131 is located on the stepped surface. The socket 5 can be connected to the first wiring hole 131 by threading, and a sealing ring is arranged between the socket 5 and the inner wall of the first wiring hole 131 to achieve sealing; the stepped surface is provided with a first positioning pin 8 hole at a symmetrical position of the first wiring hole 131, and the upper instrument 9 is provided with a corresponding second positioning pin 8 hole. The positioning pin 8 is interference-fitted in the first positioning pin 8 hole and the second positioning pin 8 hole, and cooperates with the limit to improve the connection accuracy of the upper instrument 9 and the flow channel body 1. Four screws are used to fix the large diameter section and the upper instrument 9 to achieve the connection between the upper instrument 9 and the flow channel body 1.

[0049] Furthermore, the connection 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 bottom of the connection groove 31, a first sealing ring 6 is arranged between the sealing section 311 and the straight section 122, and the threaded section 312 is threadedly connected to the straight section 122. When the pressure-resistant tube 3 is connected to the straight section 122, the pressure-resistant tube 3 is threadedly connected to the straight section 122, so as to achieve the fixation between the pressure-resistant tube 3 and the straight section 122, and the first sealing ring 6 achieves the sealing between the pressure-resistant tube 3 and the straight section 122. In this embodiment, the multi-core aviation plug connector 4 can be connected to the end face of the end of the pressure-resistant tube 3 away from the flow channel body 1 by screws, and the end of the pressure-resistant tube 3 away from the flow channel body 1 is provided with a male thread for threaded docking and fixing with the lower end instrument of the well, and a sealing ring is arranged between the end of the pressure-resistant tube 3 away from the flow channel body 1 and the lower end instrument to achieve sealing.

[0050] Furthermore, if Figure 1 , Figure 4 and Figure 5As shown, the circuit communication component 2 includes a circuit skeleton 21 and a circuit board 22. The circuit skeleton 21 is detachably connected to the end surface of the straight segment 122, and the circuit board 22 is installed on the circuit skeleton 21. The circuit skeleton 21 includes a first connection block 211, a mounting plate 212, and a second connection block 213 connected in sequence. The first connection block 211 is connected to the end surface 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; both ends of the mounting plate 212 are provided with threading holes 2121, and the two threading holes 2121 are respectively connected 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, and the first connection block 211 can be connected to the end surface of the straight section 122 by four screws, and the wires in the first channel 13 can pass through the wire entry hole 2111 and the wire threading hole 2121 and be connected to the circuit board 22, and the wires of the circuit board 22 can pass through the wire threading hole 2121, the wire outlet hole 2131, and the second channel 32 to be connected to the multi-core aviation plug connector 4. In other embodiments, the circuit board 22 can be installed 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 groove 31 to prevent the circuit communication component 2 from shaking in the connecting groove 31 , thereby improving the installation stability of the circuit communication component 2 .

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

[0053] Preferably, the circuit communication component 2 further includes a thermal pad 24, which is 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 pasted to the empty space at the lower end of the circuit processing board.

[0054] Further preferably, the circuit communication component 2 also includes two pressure strips 25, which are installed at both ends of the circuit board 22 along the first direction, and the pressure strips 25 extend along the second direction. Two countersunk holes 252 are arranged on the pressure strips 25 at intervals along the second direction. 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 to each other. The countersunk screws 26 are passed through the countersunk holes 252 and the through hole and are threadedly connected to the threaded hole, so that the circuit board 22 is installed on the mounting plate 212. By setting the pressure strips 25 to press the circuit board 22, the force 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 fixedly installed on the upper end of the circuit board 22 by instant adhesive to ensure that the hole positions correspond. In this embodiment, the first direction is X, the second direction is Y, the first direction is perpendicular to the second direction, and the first direction extends along the axis direction of the annular portion 11.

[0055] Further preferably, 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 . The wire can pass through the wiring gap 251 and be connected to the circuit board 22 .

[0056] Preferably, the circuit communication assembly 2 further comprises 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, thereby preventing the pins on the circuit board 22 from directly contacting the mounting plate 212 and damaging the circuit board 22.

[0057] In this embodiment, the flow channel body 1 is made of non-magnetic, highly corrosion-resistant stainless steel material. The pressure-resistant cylinder 3 is made of non-magnetic, highly corrosion-resistant and high-strength nickel alloy material. The support bar 27 is made of polyetheretherketone material with 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 by four screws, wherein the wire of the socket 5 on the flow channel body 1 passes through the first channel 13 and is butt-welded with the upper lead of the circuit communication component 2. Then the disc spring is installed into the bottom of the connecting groove 31, and the flow channel body 1 with the assembled circuit communication component 2 is installed into the pressure-resistant cylinder 3. The flow channel body 1 and the pressure-resistant cylinder 3 are threadedly connected and fixed, and the circuit communication component 2 presses the disc spring 23. The wire at the lower end of the circuit board 22 is led out from the second channel 32 of the pressure-resistant cylinder 3 and is welded and fixed to the multi-core aviation plug connector 4, and the multi-core aviation plug connector 4 is fixed to the end face of the pressure-resistant cylinder 3 by four screws.

[0060] The present 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 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 only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A downhole instrument docking communication short section mechanism, characterized in that: include: A flow channel body (1), comprising an annular portion (11) and a cantilever portion (12), the cantilever portion (12) comprising an inclined section (121) and a straight section (122), the straight section (122) being connected to the annular portion (11) via the inclined section (121), and the straight section (122) being coaxial with the axis of the annular portion (11), and an end of the annular portion (11) away from the cantilever portion (12) being used for connecting an upper end instrument (9); A circuit communication component (2), the circuit communication component (2) being connected to an 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 installed at one end of the annular portion (11) 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 short section 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, the first wiring hole (131) being located in the annular portion (11), the inclined wiring hole (132) being arranged in the inclined section (121), the second wiring hole (133) being located in the straight section (122), and the socket (5) being installed at one end of the first wiring hole (131) away from the inclined wiring hole (132).

3. The downhole instrument docking communication short section mechanism according to claim 1, characterized in that: The connecting groove (31) comprises a sealing section (311) and a threaded section (312); 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 short section mechanism according to any one of claims 1 to 3, characterized in that: The circuit communication component (2) comprises a circuit frame (21) and a circuit board (22); the circuit frame (21) is detachably connected to the end surface of the straight line segment (122); and the circuit board (22) is mounted on the circuit frame (21).

5. The downhole instrument docking communication short section 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) which are connected in sequence, the first connection block (211) being connected to the end surface of the straight line segment (122), the first connection block (211) being provided with a wire entry hole (2111) communicating with the first channel (13), and the second connection block (213) being provided with a wire exit hole (2131) communicating with the second channel (32); wire threading holes (2121) are provided at both ends of the mounting plate (212), and the two wire threading holes (2121) are respectively connected to the wire entry hole (2111) and the wire exit hole (2131).

6. The downhole instrument docking communication short section 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 short section 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 short section mechanism according to claim 5, characterized in that: The circuit communication component (2) further comprises a thermal pad (24), wherein the thermal pad (24) is arranged between the circuit board (22) and the mounting plate (212).

9. The downhole instrument docking communication short section mechanism according to claim 5, characterized in that: The circuit communication component (2) also includes two pressure strips (25), the two pressure strips (25) are installed at the two ends of the circuit board (22) along the first direction, the pressure strip (25) extends along the second direction, and two countersunk holes (252) are arranged on the pressure strip (25) along the second direction at intervals, the circuit board (22) is provided with a through hole, and the mounting plate (212) is provided with a threaded hole, the countersunk hole (252), the through hole and the threaded hole correspond to each other one by one, and the countersunk screw (26) is passed through the countersunk hole (252) and the through hole and is threadedly connected to the threaded hole.

10. The downhole instrument docking communication short section 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 short joint mechanism according to claim 5, characterized in that: The circuit communication component (2) further comprises two support bars (27), wherein the two support bars (27) are installed between the circuit board (22) and the mounting plate (212) at intervals along a first direction, and the support bars (27) are 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 as claimed in any one of claims 1 to 11, wherein one end of the annular portion (11) 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 instrument, and the multi-core aviation plug connector (4) is electrically connected to the lower instrument.

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