A cable traverser for downhole packers

Abstract

This invention discloses a cable pass-through device for downhole packers, comprising a pass-through device body. The pass-through device body includes a main shell and protective sleeves disposed at both ends of the main shell. The protective sleeves are coaxially arranged with the main shell, and the main shell has a cavity I along its axial direction. An adapter terminal is disposed within potting compound inside cavity I. The two ends of the adapter terminal are used to pass through and fix the ends of cable components. The protective sleeve has a cavity II along its central axis, and a rubber body is disposed within cavity II. One end of the rubber body is fixedly connected to the main shell. This device, through structural improvements, effectively solves the technical problems of sealing and easy failure and burnout under high temperature and high pressure.

Description

Technical Field

[0001] This invention belongs to the field of cable tunneling device technology, specifically relating to a cable tunneling device for downhole packers. Background Technology

[0002] Currently, oil wells generally use electric submersible pumps (ESPs) to improve oil production efficiency. To allow the cable to pass through the downhole packer to power the ESP, a cable packer passer is required. However, current cable packer passers suffer from poor sealing and are prone to failure and burnout under high temperature and pressure. Furthermore, with increasing oil production requirements, the passers need to withstand increasingly higher temperatures, which existing industry products can no longer meet. Therefore, improvements are urgently needed to enhance their performance. Summary of the Invention

[0003] The purpose of this invention is to solve the problems existing in the prior art and provide a cable pass-through device for downhole packers. This device effectively solves the technical problems of sealing and easy failure and burnout under high temperature and high pressure through structural improvements.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a cable passer for a downhole packer, comprising a passer body, the passer body comprising a main housing and protective sleeves disposed at both ends of the main housing, the protective sleeves being coaxially disposed with the main housing, and the main housing having a cavity I disposed along the axial direction, the adapter terminal being disposed in potting compound inside the cavity I, the two ends of the adapter terminal being used to pass through and fix the ends of cable components respectively, the protective sleeve having a cavity II disposed along the central axis, the cavity II also being provided with a rubber body, one end of the rubber body being fixedly connected to the main housing.

[0005] As a preferred embodiment, a positioning pad is provided in the port of the protective sleeve away from the main housing, and the positioning pad is provided with a through hole I along the central axis for adapting to the shape of the cable component.

[0006] As a preferred embodiment, a stop is provided at the port of the protective sleeve, and a step is formed on the outer wall of the positioning pad to cooperate with the stop.

[0007] As a preferred embodiment, a sealant is provided inside the cavity I near both ends. The shape of the sealant is adapted to the inner shape of the cavity I, and the sealant is provided with a through hole II along the axial direction for the cable core to pass through.

[0008] As a preferred embodiment, the inner wall of cavity I is provided with a groove I around the periphery, and the outer protrusion of the potting adhesive cooperates with the groove I.

[0009] As a preferred embodiment, the adapter terminal is externally fitted with an insulating sleeve, which is disposed within the potting compound, and the axial ends of the insulating sleeve cover the ends of the adapter terminal.

[0010] As a preferred embodiment, the outer wall of the adapter terminal is provided with a groove or a protrusion.

[0011] As a preferred embodiment, the insulator sleeve is made of high-temperature resistant insulating material.

[0012] As a preferred embodiment, the main housing and the protective sleeve are connected by a thread.

[0013] As a preferred embodiment, an external sleeve assembly is also included, which is used to fit over the outside of the cable rig body for mounting the cable rig onto the packer.

[0014] As a preferred embodiment, the external sleeve assembly includes a mounting housing and a locking connector. The ends of the mounting housing and the locking connector are threaded together. An inner boss II is formed on the inner wall of the cavity III of the locking connector, which is axially limited and matched with the tail end of the outer boss of the main housing. The head end of the outer boss of the main housing is axially limited and matched with the tail end of the mounting housing.

[0015] As a preferred embodiment, a sealing ring is provided between the main housing and the mounting housing.

[0016] As a preferred embodiment, the outer wall of the main housing is provided with an outer annular groove for accommodating the sealing ring, or the inner wall of the mounting housing cavity IV is provided with an inner annular groove for accommodating the sealing ring.

[0017] As a preferred embodiment, the rubber body has a frustum structure, with its large-diameter end connected to the main shell; the outer circle is adapted to the internal structure of the cavity II.

[0018] As a preferred embodiment, the device also includes cable components, with the two cable components extending into and fixed inside the main body of the device through the two ports of the device. Each cable component is provided with at least one cable core, which includes a core wire and a cable insulation layer wrapped around the core wire. A metal protective layer is provided outside the cable insulation layer.

[0019] As a preferred embodiment, the cable armor layer is also included, which is entirely covered and disposed on the outside of the cable core.

[0020] As a preferred embodiment, a portion of the cable armor layer is disposed within the rubber body; the exposed portion of the metal protective layer is submerged within the rubber body; a portion of the cable insulation layer is submerged within the rubber body, and the other portion is submerged within the potting compound.

[0021] As a preferred embodiment, the main housing is provided with connecting cylinder sections at both ends that are connected to the rubber body, and the inner wall of the connecting cylinder section is provided with grooves II around the periphery. Alternatively, a groove Ⅲ may be provided on the outer wall of the connecting cylinder section; Alternatively, the inner wall of the connecting cylinder section may be provided with groove II, and the outer wall of the connecting part may be provided with groove III.

[0022] As a preferred embodiment, the potting compound is formed by injection molding.

[0023] As a preferred embodiment, the rubber body is formed by compression molding.

[0024] Beneficial effects Firstly, this invention improves the structure by providing protective sleeves at both ends of the main housing. The rubber body is positioned inside the cavities of these sleeves, enhancing its strength and preventing swaying and bending, thus preventing core breakage and detachment of the rubber. The ends of the two cable cores extend into the ends of the adapter terminal and are crimped and fixed. The adapter terminal is then submerged in the potting compound for external sealing and load-bearing. The rubber bodies at both ends of the main housing, molded into shape, provide protection and sealing for the core wires.

[0025] Secondly, in this solution, a positioning pad is provided at the outer end of the protective sleeve. The perforation of the positioning pad matches the shape and size of the cable component, thereby better straightening the cable and preventing the swinging of the external cable part from causing the rubber body and wire core inside the main housing to swing.

[0026] Thirdly, in this solution, the external of the adapter terminal is fitted with an insulating sleeve, which ensures that the specific covering length and thickness meets the product's electrical performance requirements. This avoids the electrical performance defects caused by the pores introduced by the insulating film wrapping in conventional products, and also avoids high-voltage breakdown caused by adhesive bubbles in the pure potting method, thereby improving the reliability of the device.

[0027] Fourth, this solution increases the load-bearing capacity of the potting compound by setting an annular groove inside the main housing, preventing axial relative displacement between the main housing and the potting compound. At the same time, the connecting cylinder sections at both ends of the main housing that connect to the rubber body are provided with inner and outer annular grooves, which increases the clamping force between the rubber body and the main housing. In addition, the connecting cylinder section is provided with a through hole. When the rubber body is molded, the rubber body will enter the through hole of the connecting part. After the rubber body is molded, it can further increase the clamping force between the main housing and the rubber body. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a cross-sectional view of the cable crossing device of the present invention; Figure 2 This is a perspective view of the cable crossing device in this invention; Figure 3 Schematic diagram of the connection between the main shell and the rubber body: Figure 4 This is a schematic diagram showing the fit between the positioning pad and the cable fitting; Figure 5 This is a side view of the cable pass-through device of the present invention; Figure 6 This is a diagram showing the internal structure of the cable pass-through device of the present invention; Figure 7 This is an external structural diagram of the cable passer of the present invention: the mounting housing and locking connector cap are hidden. Figure 8 This is a structural diagram of the main housing of the present invention; Figure 9 This is a schematic diagram showing the corresponding positions of the adapter terminal and the sealant inside the main housing of the present invention; Figure 10 This is a schematic diagram illustrating the fit between the positioning gasket and the protective sleeve in this invention; Figure 11 This is a schematic diagram showing the fit between the locking connector cap and the main housing in this invention; Marked in the image: 1. Cable fittings; 101. Cable core; 2. Positioning gasket; 21. Perforation I; 22. Step; 23. Positioning cylinder; 24. Gasket part; 25. End cavity; 3. Protective sleeve; 31. Cavity II; 32. Baffle. 4. Rubber body; 5. Metal protective layer; 6. Cable insulation layer; 7. Sealing compound; 71. Perforation II; 8. Potting compound; 9. Main shell; 91. Cavity I; 911. Groove I; 92. Connecting cylinder section; 921. Groove II; 922. Groove III; 93. Outer annular groove; 94. Through hole; 95. Outer boss; 96. External thread section. 10. Insulating bushing; 11. Adapter terminal; 12. Locking connector cap; 121. Cavity III; 122. Inner boss II; 13. Mounting housing; 131. Cavity IV; 132. Inner boss I; 133. External thread; 134. Clamping platform; 14. Sealing ring; 100. The main body of the time machine. Detailed Implementation

[0030] The present invention will now be described in detail through exemplary embodiments. However, it should be understood that, without further description, elements, structures, and features in one embodiment may be advantageously incorporated into other embodiments.

[0031] It should be noted that, unless otherwise defined, the technical or scientific terms used herein should have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "a," "an," or "the," and similar words used in the specification and claims of this patent application do not express a limitation of quantity, but rather indicate the presence of at least one. Terms such as "comprising" or "including" indicate that the elements or objects preceding "comprising" encompass the elements or objects listed following "comprising" or "including" and their equivalents, but do not exclude other elements or objects having the same function.

[0032] As shown in the figure, this embodiment provides a cable passer for a downhole packer, including a passer body 100. The passer body 100 includes a main housing 9 and a protective sleeve 3 coaxially arranged with the main housing 9. Two protective sleeves 3 are provided and respectively connected to the two ends of the main housing 9. The main housing 9 has a cavity I 91 with both ends through it along the central axis. The cavity I 91 is used to install and install an adapter terminal 11 and is filled with potting compound 8. The adapter terminal 11 is completely submerged in the potting compound 8, and the two ends of the adapter terminal 11 are used to pass the ends of the cable core 101 through it and align them. The end wire core (after stripping the outer cable insulation layer from the end of the core wire, this part is fixed in the cavity of the adapter terminal 11) is crimped and fixed. The protective sleeve 3 is provided with a cavity II 31 along its central axis. The function of the cavity II 31 is to accommodate the rubber body 4. Specifically, the rubber body 4 is molded at the connecting cylinder section 92. After molding, the rubber body 4 is fixedly connected to the connecting cylinder section 92 of the main housing 9. The protective sleeve 3 and the positioning gasket 2 are fitted on the outside of the rubber body 4. Preferably, the positioning gasket 2 abuts against the end of the rubber body 4. The positioning gasket 2 is located at the end of the cavity II 31 of the protective sleeve 3.

[0033] In one possible embodiment of the present invention, the positioning pad 2 includes a positioning cylinder 23 and a pad portion 24 located at one end of the positioning cylinder 23. The positioning cylinder 23 is installed inside the cavity II 31, and the outer wall of the positioning cylinder 23 matches the shape and size of the cavity II 31. A through hole I 21 adapted to the shape and size of the cable component 1 is formed on the pad portion 24. The through hole I 21 can be used to pass through and straighten the cable component 1. A step 22 is provided on the outer wall of the positioning cylinder 23 near the pad portion 24, and a stop 32 is provided at the end of the protective sleeve 3. The step 22 of the positioning pad 2 and the stop 32 of the protective sleeve 3 are axially limited to restrict the positioning pad 2 inside the end of the cavity II 31, preventing the positioning pad 2 from coming out of the protective sleeve 3. An end cavity 25 is formed inside the positioning cylinder 23 to accommodate the end of the rubber body 4. The through hole I 21 communicates with the inside of the end cavity 25. This allows for better axial and radial positioning of the positioning pad 2. In addition, in an embodiment of this solution without accompanying drawings, the positioning pad 2 can also be configured as a sheet structure, which, when used in conjunction with the protective sleeve 3, can also achieve the above-mentioned positioning and straightening effect.

[0034] In this invention, the protective sleeve 3 is connected to the end of the main housing 9 by a threaded connection. The main housing 9 is provided with an external thread section 96 near the two ends. The port of the connecting end of the protective sleeve 3 is provided with an internal thread adapted to the external thread section 96. The end of the main housing 9 is provided with a connecting cylinder section 92, which is connected to the external thread section 96 and located at the end of both ends of the main housing 9. The outer diameter of the connecting cylinder section 92 is smaller than the outer diameter of the external thread section 96. Grooves are provided on the inner and outer walls of the connecting cylinder section 92, with groove II 921 circumferentially arranged on the inner wall and / or groove III 922 circumferentially arranged on the outer wall. By adding these grooves, the connecting cylinder section 92 enhances the clamping force at the bonding point between the rubber body 4 and the main housing 9. Several through holes 94 are also provided on the connecting cylinder section 92, connecting the cavity and the outer wall of the connecting cylinder 92. During molding, the rubber body 4 enters the through holes 94 and is integrally formed, thus further strengthening the clamping force between the rubber body 4 and the main housing 9. It should be noted that the main housing 9 and the protective sleeve 3 can also be connected in other ways.

[0035] This solution improves the structure by having a protective sleeve 3 cover the outside of the rubber body 4. The protective sleeve 3 enhances the strength of the rubber body 4, preventing it from swaying and bending within the cavity II 31, thus preventing core breakage and rubber detachment. The perforation I 21, by straightening the cable component 1, prevents the adverse effects of external cable component 1 swaying on the internal structure, while also preventing core breakage and rubber detachment, thus avoiding tearing and separation of the rubber body 4 from the outer surface of the cable core 101.

[0036] In this scheme, the rubber body 4 and the potting compound 8 are virtual components, which are formed during the assembly of the cable component 1 and the cable passer 100. The rubber body 4 is molded and fixed on the connecting cylinder section 92. Preferably, the material of the rubber body 4 is fluororubber. The potting compound 8 is formed by injecting the compound into the cavity I91 of the main housing 9. Preferably, the potting compound 8 is epoxy or inorganic adhesive. The housing part is preferably made of stainless steel, high-temperature nickel-based alloy or copper alloy. In order to improve the sealing and load-bearing effects of the main housing 9 and the potting compound 8, a number of grooves I911 are provided axially on the inner wall of the cavity I91 of the main housing 9. There are multiple grooves I911 arranged axially, and all grooves I911 are arranged around the inner wall of the cavity I91. The purpose is to allow the colloid to enter the groove I911 and form during colloid potting, thereby increasing the load-bearing capacity of the potting compound 8, preventing cable damage caused by colloid displacement, and preventing failure of the internal cable structure. At the same time, setting the groove I911 can also improve the internal heat dissipation capacity of the device and reduce the risk of failure and burnout.

[0037] As shown in the figure, the rubber body 4 can be cylindrical in shape. In addition, in an embodiment of this solution without drawings, the rubber body 4 can also be configured as a frustum structure. The rubber body 4 includes a large diameter end and a small diameter end, and a circumferential outer frustum is provided between the large diameter end and the small diameter end. The large diameter end is the end connected to the main housing 9. The diameter gradually decreases from the large diameter end to the small diameter end. The inner wall of the protective sleeve 3 has an inner frustum. By the cooperation between the inner frustum of the protective sleeve 3 and the outer frustum of the rubber body 4, the component force of the external environmental pressure can be applied to the rubber body 4, thereby making it better hold the internal cable component 1.

[0038] In this invention, to better achieve the molding of the potting compound 8, one end of the cavity I 91 needs to be sealed before the compound is injected. Therefore, a sealing compound 7 needs to be further provided inside the cavity I 91. Multiple through holes II 71 are formed on the sealing compound 7. The purpose of the through holes II 71 is to allow the cable core 101 to pass through. Taking a cable component 1 containing three cable cores 101 as an example, three through holes II 71 are arranged in a triangular pattern. The shape of the sealing compound 7 matches the inner diameter of the cavity I 91. After the potting cavity is formed by the sealing compound 7, the compound can be injected into the potting cavity, waiting for the potting compound 8 to form. The adapter terminal 11 located inside the potting cavity will be fixed inside the potting compound 8. In this solution, the sealing compound 7 is provided at least at one end of the potting compound 8; preferably, the sealing compound 7 is provided at both ends of the potting compound 8.

[0039] To further improve performance and prevent product failure and burnout under high temperature and pressure, an insulating sleeve 10 is provided on the outside of the adapter terminal 11. The coverage length and thickness of the insulating sleeve 10 effectively meet the working electrical performance requirements. The insulating sleeve 10 is made of high-temperature resistant insulating material. After potting the adhesive, the insulating sleeve 10 is also placed inside the potting compound 8. The purpose of this design is, on the one hand, to avoid the electrical performance defects caused by the pores introduced by the conventional product's insulating film winding method, and on the other hand, to avoid the high-voltage breakdown problem caused by adhesive air bubbles in the pure potting method. The outer wall of the adapter terminal 11 is provided with an annular groove or annular protrusion for a tight fit with the insulating sleeve 10, thereby preventing axial relative displacement between the adapter terminal 11 and the insulating sleeve 10.

[0040] In this invention, the cable component 1 has at least one cable core 101, and the cable core 101 includes at least a core wire and a cable insulation layer 6 covering the core wire. Preferably, the cable core 101 also includes a metal protective tube layer 5, which is wrapped around the outside of the cable insulation layer 6 to improve the mechanical protection and environmental isolation performance of the single cable core 101, and also serves as a metal shielding layer. By ensuring that each layer has a certain length of adhesive contact with the rubber body 4, the bonding strength between the cable and the external sealing structure is enhanced. In addition, a cable armor layer can be wrapped around the entire outside of the cable core 101 to improve the overall mechanical strength of the cable component 1. In this solution, the cable component 1 is selected as a high-temperature resistant insulated cable (the cable insulation material is fluoroplastic, polyimide, or polyetheretherketone). Taking a cable with a cable armor layer as an example, when there is an armor layer, a portion of the cable armor layer, a portion of the metal protective layer 5, and the exposed portion of the cable insulation layer 6 are not within the rubber body 4. The cable insulation layer 6 is exposed, while the rest is submerged in potting compound 8 and sealant 7.

[0041] In this embodiment, to install the transceiver body 100 onto the packer, an external sleeve assembly is also provided on the outside of the transceiver body 100. The external sleeve assembly is fitted onto the outside of the transceiver body 100 and includes a mounting housing 13 and a locking connector 12. The mounting housing 13 and the locking connector 12 are screwed together to form a complete mounting shell. A sealing ring 14 is provided between the mounting shell and the main shell 9 to achieve a sealed connection between the mounting shell and the main shell 9. In this design, the shell components are made of stainless steel, copper alloy, or nickel-based high-temperature resistant alloy. The mounting housing 13 has a locking platform 134 and an external thread 133 connected to the packer on its outer cylindrical surface near the head end. The external thread 133 is used to connect to the equipment. The locking platform 134 has a locking surface for easy insertion of tools such as wrenches, thereby facilitating the installation and connection of the external sleeve assembly.

[0042] In a typical embodiment of this solution, the mounting housing 13 is provided with a cavity IV 131 that extends through both ends along the central axis. An inner boss I 132 is formed on the inner wall of the cavity IV 131. The locking connector 12 is provided with a cavity III 121 that extends through both ends along the central axis. An inner boss II 122 is provided on the inner wall of the cavity III 121 near the tail end. An outer boss 95 is provided around the outer wall of the main housing 9 in the circumferential direction. The inner boss II 122 and the tail end of the outer boss 95 form an axial limiting fit. The head end of the outer boss 95 and the tail end of the mounting housing 13 form an axial limiting fit. Thus, after the mounting housing 13 and the locking cap 12 are screwed and fixed, axial positioning can be achieved from two directions, preventing relative axial movement or separation between the mounting housing and the transceiver body 100. Simultaneously, multiple outer annular grooves 93 are provided on one side of the outer protrusion 95 of the main housing 9, and sealing rings 14 are installed within the outer annular grooves 93, aiming to form multiple seals between the main housing 9 and the mounting housing 13 along the axial direction. Alternatively, an inner annular groove can be provided inside the cavity IV 131 of the mounting housing 13, and a sealing ring 14 can be installed within the inner annular groove, achieving the same sealing effect.

[0043] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes, and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A cable pass-through device for downhole packers, characterized in that: The device includes a main body (100), which includes a main housing (9) and protective sleeves (3) disposed at both ends of the main housing (9). The protective sleeves (3) are coaxially disposed with the main housing (9), and the main housing (9) has a cavity I (91) disposed along the axial direction. The adapter terminal (11) is disposed in the potting compound (8) inside the cavity I (91). The two ends of the adapter terminal (11) are used to pass through and fix the ends of the cable components (10). The protective sleeve (3) has a cavity II (31) disposed along the central axis. A rubber body (4) is also disposed inside the cavity II (31). One end of the rubber body (4) is fixedly connected to the main housing (9).

2. The cable pass-through device for a downhole packer according to claim 1, characterized in that: The protective sleeve (3) is provided with a positioning pad (2) at the port away from the main housing (9). The positioning pad (2) is provided with a through hole I (21) along the central axis to adapt to the shape of the cable component (1).

3. A cable pass-through device for a downhole packer according to claim 1, characterized in that: A stop (32) is provided at the port of the protective sleeve (3), and a step (22) is formed on the outer wall of the positioning pad (2) to cooperate with the stop (32).

4. A cable pass-through device for a downhole packer according to claim 1, characterized in that: The cavity I (91) is provided with a sealant (7) near both ends. The shape of the sealant (7) is adapted to the shape of the cavity I (91), and the sealant (7) is provided with a through hole II (71) along the axial direction for the cable core (101) to pass through.

5. A cable pass-through device for a downhole packer according to claim 1, characterized in that: The inner wall of cavity I (91) is provided with a groove I (911) around the periphery, and the outer protrusion of the potting compound (8) fits with the groove I (911).

6. A cable pass-through device for a downhole packer according to claim 1, characterized in that: The adapter terminal (11) is covered with an insulating sleeve (10), which is disposed inside the potting compound (8), and the axial ends of the insulating sleeve (10) cover the ends of the adapter terminal (11).

7. A cable pass-through device for a downhole packer according to claim 1, characterized in that: The outer wall of the adapter terminal (11) is provided with grooves or protrusions.

8. A cable pass-through device for a downhole packer according to claim 6, characterized in that: The insulating sleeve (10) is made of high-temperature resistant insulating material.

9. A cable pass-through device for a downhole packer according to claim 1, characterized in that: The main housing (9) is threadedly connected to the protective sleeve (3).

10. A cable pass-through device for a downhole packer according to claim 1, characterized in that: It also includes an external sleeve assembly for fitting around the outside of the cable loader body (100) for mounting the cable loader onto the packer.

11. A cable pass-through device for a downhole packer according to claim 10, characterized in that: The external sleeve assembly includes a mounting housing (13) and a locking connector (12). The ends of the mounting housing (13) and the locking connector (12) are threaded together. An inner boss II (122) is formed on the inner wall of the cavity III (121) of the locking connector (12), which is axially limited to the tail end of the outer boss (95) of the main housing (9). The head end of the outer boss (95) of the main housing (9) is axially limited to the tail end of the mounting housing (13).

12. A cable pass-through device for a downhole packer according to claim 11, characterized in that: A sealing ring (14) is provided between the main housing (9) and the mounting housing (13).

13. A cable pass-through device for a downhole packer according to claim 12, characterized in that: The outer wall of the main housing (9) is provided with an outer annular groove (93) for accommodating the sealing ring (14), or the inner wall of the cavity IV (131) of the mounting housing (13) is provided with an inner annular groove for accommodating the sealing ring (14).

14. A cable pass-through device for a downhole packer according to claim 1, characterized in that: The rubber body (4) has a frustum structure, with its large diameter end connected to the main shell (9); its outer circle is adapted to the inner cavity structure of the cavity II (31).

15. A cable pass-through device for a downhole packer according to claim 1, characterized in that: It also includes cable components (1), with the two cable components (1) extending into the interior of the transducer body (100) through the two ports and being fixed therein. The cable component (1) is provided with at least one cable core (101), and the cable core (101) includes a core wire and a cable insulation layer (6) wrapped around the core wire. A metal protective layer (5) is provided outside the cable insulation layer (6).

16. A cable pass-through device for a downhole packer according to claim 15, characterized in that: It also includes a cable armor layer, which is entirely wrapped around the outside of the cable core (101).

17. A cable pass-through device for a downhole packer according to claim 16, characterized in that: A portion of the cable armor layer is disposed within the rubber body (4); the exposed portion of the metal protective layer (5) is submerged within the rubber body (4); a portion of the cable insulation layer (6) is submerged within the rubber body (4), and the other portion is submerged within the potting compound (8).

18. A cable pass-through device for a downhole packer according to claim 1, characterized in that: The main housing (9) is provided with a connecting cylinder section (92) connected to the rubber body (4) at both ends. The inner wall of the connecting cylinder section (92) is provided with a groove II (921) around the circumference. Or a groove Ⅲ (922) is provided on the outer wall of the connecting cylinder section (92); Alternatively, the inner wall of the connecting cylinder section (92) may be provided with groove II (921) and the outer wall of the connecting part (92) may be provided with groove III (922).

19. A cable pass-through device for a downhole packer according to claim 1, characterized in that: The potting compound (8) is formed by injection.

20. A cable pass-through device for a downhole packer according to claim 1, characterized in that: The rubber body (4) is formed by compression molding.

Images