Sealing joint and cable installation method

Abstract

The invention discloses a sealing joint and a cable installation method, and belongs to the technical field of petroleum drilling equipment, the sealing joint comprises a connecting joint part, an upper joint part and a lower joint part, and a third interval is defined by the inner wall of the connecting joint and the axial end faces of the upper joint part and the lower joint part; and the clamping sleeve assembly is assembled in the third section. When the clamping sleeve component and the clamping sleeve seat body in the third section are assembled, the first contact surface and the second contact surface clamp a steel wire layer of the cable so as to realize hanging and clamping of the cable, and the safety and the reliability are high.

Description

Technical Field

[0001] The invention belongs to the technical field of oil drilling equipment, and in particular relates to a method for installing a sealing joint and a cable. Background Art

[0002] At present, the domestic and foreign coiled tubing drilling technology mainly uses mechanical motors as power drill tools. Compared with mechanical drill tools, electric drill tools have the advantages of efficient power output under low hydraulic energy efficiency conditions and easy high-speed control. They can solve the problem of insufficient effective power output in coiled tubing drilling and achieve rapid drilling at low drilling pressure and high speed. The speed and torque are steplessly adjustable, which is convenient for realizing closed-loop automatic control of drilling parameters, which is beneficial to improving the mechanical drilling speed and drill bit footage and reducing the number of tripping and drilling. The application and promotion of coiled tubing electric drilling systems have put forward higher requirements for the safe operation of the oil reed at the cable coiled tubing drum.

[0003] The cable led out of the current collecting slip ring is connected to the large-sized cable passing through the coiled tubing at the drum oil pin. Through the cable passing through the coiled tubing, the ground power supply provides power and signal transmission to the downhole electric drilling tool. The large-sized cable extending from the drum oil pin on the ground must be sealed to prevent the high-pressure fluid in the coiled tubing from leaking out. At the same time, the thick cable inside the coiled tubing needs to be fixed to prevent the cable from moving and sliding into the well. The cable sealing joints currently used in coiled tubing drilling are only for small-sized cables, which cannot provide sufficient cable suspension clamping force and have low safety and reliability. Summary of the invention

[0004] The object of the present invention is to provide a sealing joint and a method for installing a cable, so as to solve the problems in the installation process of large-size cables mentioned in the above background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a sealing joint, comprising:

[0006] Used for clamping and sealing a double-wire layer armored cable, the sealing joint has a cylindrical hole for the cable to pass through and extending along the axis O, and the sealing joint comprises:

[0007] A connecting joint component extending along the axis O and having a first axial end and a second axial end;

[0008] an upper joint component, assembled on the first end of the connecting joint component;

[0009] A lower joint component, assembled on the second end of the connecting joint component;

[0010] A third section is defined by the inner wall of the connecting joint and the axial end faces of the upper joint component and the lower joint component;

[0011] A ferrule assembly is assembled in the third interval, and the ferrule assembly includes:

[0012] A ferrule component having a first contact surface;

[0013] The ferrule seat body has a locking area for accommodating the ferrule component formed therein and has a second contact surface. The first contact surface and the second contact surface are in contact with each other when the ferrule component and the ferrule seat body are assembled.

[0014] Preferably, the first contact surface and the second contact surface are both configured as conical surfaces.

[0015] Preferably, the first contact surface and the second contact surface are provided with matching ferrule teeth.

[0016] Preferably, a first section is formed in the connecting joint component, the third section is constituted as a part of the first section, and a part of the upper joint component can enter the first section and be connected to the connecting joint component.

[0017] Preferably, the partial section of the upper joint component entering the first interval is constituted as a second step section, a second interval is formed between the outer wall of the second step section and the inner wall of the connecting joint component, and the second interval is connected to the third interval.

[0018] Preferably, the lower joint component has a second mounting portion, and a region for accommodating the mounting sleeve is formed in the second mounting portion.

[0019] Preferably, the connection positions between the connecting joint component and the upper joint component and the lower joint component are all sealed by sealing rings.

[0020] Preferably, the sealing joint further comprises a sealing assembly assembled in the sealing interval of the upper joint component, and the sealing assembly comprises:

[0021] a sealing packing configured to be compressible and to radially deform based on the compression;

[0022] The pressure cap component is configured to be able to move linearly along the axis O to control the deformation of the sealing packing.

[0023] Preferably, the pressure cap component and the upper joint component are threadedly connected and have a protruding section extending out from the sealing interval.

[0024] Preferably, the sealing assembly further comprises a gasket portion arranged between the sealing packing and the pressure cap component.

[0025] On the other hand, the present application provides a method for installing a cable, wherein the cable has a cable polished rod and a first steel wire layer and a second steel wire layer wrapped around the outer periphery of the cable polished rod, wherein the method is implemented based on a sealing joint, wherein the sealing joint has a cylindrical hole for the cable to pass through and extending along an axis O, and the sealing joint comprises:

[0026] A connecting joint component extending along the axis O and having a first axial end and a second axial end;

[0027] an upper joint component, assembled on the first end of the connecting joint component;

[0028] A lower joint component, assembled on the second end of the connecting joint component;

[0029] A third section is defined by the inner wall of the connecting joint and the axial end faces of the upper joint component and the lower joint component;

[0030] A ferrule assembly is assembled in the third interval, and the ferrule assembly includes:

[0031] A ferrule component having a first contact surface;

[0032] The ferrule seat body has a locking area for accommodating the ferrule component formed therein and has a second contact surface. The first contact surface and the second contact surface are in contact with each other when the ferrule component and the ferrule seat body are assembled.

[0033] The method comprises:

[0034] Insert the cable from one end of the lower connector component, peel off the first steel wire layer and the second steel wire layer, and cut the first steel wire layer;

[0035] Inserting the electric cable through the clamping member, and making the second steel wire layer fit the first contact surface;

[0036] Insert the ferrule seat body into the ferrule component, and assemble the ferrule component and the ferrule seat body as a whole in the third section of the connecting joint component;

[0037] The connecting joint component and the upper joint component are assembled, and the cable polished rod is passed through the upper joint component.

[0038] Preferably, the sealing joint further comprises a sealing assembly assembled in the upper joint component, the sealing assembly comprises a sealing packing and a pressure cap component, and the method further comprises:

[0039] Pass the cable polished rod passing through the clamping sleeve component through the sealing packing and out of the pressure cap component;

[0040] A compressive force is applied to the sealing packing through a pressure cap component so that the sealing packing holds the cable polished rod tightly.

[0041] Compared with the prior art, the present invention has the following beneficial effects:

[0042] The present application forms the main structure of the sealing joint by arranging an upper joint component, a connecting joint component and a lower joint component, and defines a third interval by the inner wall of the connecting joint and the axial end faces of the upper joint component and the lower joint component. When the ferrule component and the ferrule seat body are assembled in the third interval, the first contact surface and the second contact surface clamp the steel wire layer of the cable to achieve hanging clamping of the cable, which has high safety and reliability. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 This is a schematic diagram of the overall structure of this application;

[0044] Figure 2 This is a schematic diagram of the assembly of the joint parts and the connecting joint parts in this application;

[0045] Figure 3 It is a schematic diagram of the assembly of the joint parts and the connecting joint parts under this application;

[0046] Figure 4 This is a schematic diagram of the assembly of the joint assembly for this application;

[0047] Figure 5 This is a schematic diagram of the card sleeve assembly for this application;

[0048] Figure 6 The cable installation diagram for this application;

[0049] Figure 7 A schematic diagram is labeled for this application.

[0050] In the figure:

[0051] 100, upper joint component; 100a, protruding section; 101, stepped portion; 101a, first stepped section; 101b, second stepped section; 102, second interval;

[0052] 110, connecting joint component; 110a, first section; 110b, middle section; 110c, second section; 111, first interval;

[0053] 120, lower joint component; 121, first mounting portion; 121a, connecting section; 121b, first diameter section; 121c, second diameter section; 122, connecting portion; 123, second mounting portion;

[0054] 130, third interval;

[0055] 140, ferrule assembly; 141, ferrule member; 141a, first contact surface; 142, ferrule seat body; 142a, second contact surface; 143, locking zone;

[0056] 150, sealing assembly; 151, sealing packing; 152, pressure cap component;

[0057] 160. Install the sleeve. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] In the subsequent description, the diameter of the inner wall section of the cylindrical component is uniformly referred to as the inner diameter, and the diameter of the outer wall section is uniformly referred to as the outer diameter. For example, Figure 7 The inner diameter and outer diameter of component A are exemplarily indicated;

[0060] A sealing joint for clamping and sealing a cable with a double steel wire layer armored cable, wherein a cylindrical hole extending along an axis O and passing through the cable is formed in the sealing joint, and when in use, the cable passes through the cylindrical hole in the sealing joint, and the cable is clamped and sealed by the sealing joint, wherein the armored cable with a double steel wire layer is a large-size cable (e.g., a cable with a bare rod diameter of 17.3 mm and an outer diameter of 25 mm), wherein the large-size cable is mainly composed of a cable bare rod (e.g., a diameter of 17.3 mm), a thin layer of steel wire is wrapped around the outer layer of the cable bare rod, and a thick steel wire layer is wrapped around the outer layer of the thin layer of steel wire layer, thereby forming the above-mentioned large-size cable (e.g., a diameter of 25 mm);

[0061] Reference Figure 1 and 4 The sealing joint includes a joint assembly, which is composed of several parts that are independent of each other and can be assembled. The two parts that can be assembled mean that the two parts are detachably connected. Specifically, the joint assembly includes an upper joint component 100, a connecting joint component 110 and a lower joint component 120. Specifically, the connecting joint component 110 is a cylindrical component that extends roughly along the axis O and has a first end and a second end in the axial direction, and a first section 111 that is roughly cylindrical is formed in the connecting joint component 110. The upper joint component 100 and the lower joint component 120 are respectively assembled at the first end and the second end of the connecting joint and can be disassembled, that is, the upper joint component 100 is detachably connected to the first end of the connecting joint, and the lower joint component 120 is detachably connected to the second end of the connecting joint;

[0062] Specifically, refer to Figure 2 and 3 The connecting joint component 110 comprises a middle section 110b and a first section 110a and a second section 110c respectively located on both sides of the middle section 110b in the axial direction, wherein the first section 110a constitutes a portion where the connecting joint component 110 is connected to the upper joint component 100, and the second section 110c constitutes a portion where the connecting joint component 110 is connected to the lower joint component 120;

[0063] Back to Figure 2 and 3 The upper joint component 100 is configured as a cylindrical component extending substantially along the axis O, and the upper joint component 100 is configured to be able to enter the first interval 111 from the first end of the connecting joint component 110 and to achieve connection with the connecting joint component 110 at the first section 110a of the connecting joint component 110. Specifically, the upper joint component 100 has a protruding section 100a, which is configured to extend outward in a radial direction and has a connecting structure that matches the first section 110a of the connecting joint component 110 to achieve connection between the connecting joint component 110 and the upper joint component 100. Exemplarily, the circumferential outer surface of the protruding section 100a of the upper joint component 100 and the inner circumferential surface of the first section 110a of the connecting joint component 110 are respectively formed with matching External thread and internal thread, at this time, the upper joint component 100 can be screwed into the above-mentioned first interval 111 from the first end of the connecting joint component 110 to achieve the connection between the upper joint component 100 and the connecting joint component 110; further, the above-mentioned upper joint component 100 also has a step portion 101 that can enter the first interval 111, and the step portion 101 includes a first step section 101a and a second step section 101b, wherein the outer diameter of the first step section 101a is the same as the inner diameter of the connecting joint component 110, that is, the outer wall of the first step section 101a and the inner wall of the connecting joint component 110 are configured to be slidingly connected, and an annular groove body for accommodating a sealing ring (such as an O-ring) is provided on the outer wall of the first step section 101a to achieve sealing when the upper joint component 100 and the connecting joint component 110 are connected, and return to Figure 2 , the step portion 101 of the upper joint component 100 is further described. The second step section 101b is located at one axial end of the upper joint component 100, and there is a gap between the outer wall of the second step section 101b and the inner wall of the connecting joint component 110, that is, the outer diameter of the second step section 101b is smaller than the inner diameter of the joint component. Correspondingly, after the upper joint component 100 and the connecting joint component 110 are assembled, a second interval 102 is formed between the outer wall of the second step section 101b and the inner wall of the connecting joint component 110;

[0064] Reference Figure 3 The lower joint component 120 has a connecting portion 122 and a first mounting portion 121 and a second mounting portion 123 respectively located at the axial ends of the connecting portion 122, wherein a space for the second end of the connecting joint component 110 to enter is formed in the first mounting portion 121, specifically, the first mounting portion 121 includes a connecting segment 121a, a first diameter segment 121b and a second diameter segment 121c sequentially arranged along the axis O, wherein a connecting structure for assembling with the second segment 110c of the connecting joint is formed on the inner wall of the connecting segment 121a, illustratively, matching internal threads and external threads are respectively provided on the inner wall of the connecting segment 121a and the outer wall of the second segment 110c of the connecting joint, further, the inner diameters of the connecting segment 121a, the first diameter segment 121b and the second diameter segment 121c gradually decrease, and the inner diameter of the second diameter segment 121c is the same as the outer diameter of the connecting joint, when the connecting joint component 110 and the lower joint component 110 are connected, the inner diameter of the connecting segment 121a, the first diameter segment 121b and the second diameter segment 121c are connected. When the upper joint component 100, the upper joint component 100 and the lower joint component 120 are connected, the end face of the second end of the connecting joint component 110 and the transition end face of the first diameter section 121b and the second diameter section 121c are in contact with each other, and the connecting joint component 110 is provided with an annular groove for accommodating a sealing ring (such as an O-ring) at the position where it is assembled with the first diameter section 121b, so as to form a seal at the connection position of the connecting joint component 110 and the lower joint component 120. At this time, after the upper joint component 100, the connecting joint component 110 and the lower joint component 120 are assembled, that is, after the upper joint component 100 and the lower joint component 120 are respectively assembled at the first end and the second end of the connecting joint component 110, a third section 130 is correspondingly formed in the connecting joint component 110, and the third section 130 is jointly defined by the inner wall of the connecting joint component 110, the lower end face of the upper joint component 100 (hereinafter referred to as the first limiting face) and the upper end face of the lower joint component 120 (hereinafter referred to as the second limiting face);

[0065] Reference Figure 1 and 5The sealing joint further comprises a ferrule assembly 140, which is assembled in the third interval 130, that is, the two axial ends of the ferrule assembly 140 are respectively limited by the first limiting surface and the second limiting surface, and are jointly limited in the circumferential direction by the inner wall of the connecting joint component 110 and the inner wall of the second diameter section 121c of the lower joint component 120. In the subsequent description process, the end of the ferrule assembly 140 close to the lower joint component 120 is recorded as the proximal end, and the end close to the upper joint component 100 is recorded as the distal end. Specifically, the The ferrule assembly 140 includes a ferrule seat body 142 and a ferrule member 141. In some embodiments, the ferrule member is substantially a cylindrical member, and one axial end of the ferrule member is formed with a locking section 143 for accommodating the ferrule member 141. The cylindrical hole on the ferrule seat body 142 constitutes a part of the locking section 143. At the same time, the ferrule member 141 can enter the locking section 143 and be assembled with the ferrule seat body 142. In some embodiments of the ferrule member 141, the ferrule seat body 142 and the ferrule member 141 are A contact surface is formed during assembly, wherein the contact surface of the ferrule member 141 is constituted as its outer surface (hereinafter referred to as the first contact surface 141a), and the contact surface of the ferrule seat body 142 is constituted as the surface of the locking zone 143 (hereinafter referred to as the second contact surface 142a). The first contact surface 141a and the second contact surface 142a are adapted to each other and fit together during assembly of the ferrule seat body 142 and the ferrule member 141, so as to apply force to the portion of the cable located between the first contact surface 141a and the second contact surface 142a (such as the subsequent outer thick steel wire layer). In some embodiments, the first contact surface 141a and the second contact surface 142a are both formed as conical surfaces, and correspondingly, the locking interval 143 is a conical interval, that is, the locking interval 143 is formed to gradually expand from the proximal end to the distal end, and the distal end of the locking interval 143 is connected to the second interval 102 to allow one end of the outer thick steel wire layer to pass through between the first contact surface 141a and the second contact surface 142a and enter the second interval 102 (described later). Further, back to Figure 5 A ferrule structure is formed on the first contact surface 141a and the second contact surface 142a, which is used to lock the cable when the first contact surface 141a and the second contact surface 142a are in contact. In some embodiments, a matching ferrule tooth structure is formed on the first contact surface 141a and the second contact surface 142a to provide a clamping force for the cable and lock the cable;

[0066] Reference Figure 1A cylindrical space for accommodating the installation sleeve 160 is formed in the second installation portion 123 of the lower connector component 120, and one axial end of the cylindrical interval is open to allow the installation sleeve 160 to enter and be assembled in the interval in the second installation portion 123. In some embodiments, the installation sleeve 160 is substantially a cylindrical component extending along the axis O, and one axial end of the installation sleeve 160 passes through the interval in the second installation portion 123, and the inner diameter of the installation sleeve 160 is the same as the outer diameter of the large-size cable, so that the large-size cable can enter the sealing joint from the installation sleeve 160 and ensure the sealing of the inlet position;

[0067] Reference Figure 1 and 6 A sealing interval is formed at one axial end of the upper joint component 100. Correspondingly, the sealing joint further comprises a sealing assembly 150, which is assembled in the sealing interval and seals the large-size cable at the corresponding position, that is, the large-size cable is sealed at the position where the large-size cable passes through the sealing joint;

[0068] In some embodiments, the sealing assembly 150 includes a sealing packing 151, in which a hole for a large-sized cable to pass through is formed, and the sealing packing 151 is configured to be compressed and to generate radial deformation based on compression, so that the sealing packing 151 hugs the cable to form a seal. In some embodiments, the sealing assembly 150 also includes a pressing cap component 152, which is roughly configured as a cylindrical component, and one axial end of the pressing cap component 152 is in contact with the sealing packing 151, and the pressing cap component 152 is configured to be able to move linearly along the axis O to The sealing packing 151 applies a compressive force. Exemplarily, the pressure cap component 152 is threadedly connected to the upper joint component 100, and part of the pressure cap component 152 passes through the sealing interval (later becoming an extended section). When in use, a rotational driving force is applied to the extended section of the pressure cap component 152 to rotate the pressure cap component 152 into the sealing interval and compress the sealing packing 151 to achieve sealing of the cable end. In other embodiments, the sealing assembly 150 also includes a gasket component arranged between the pressure cap component 152 and the sealing packing 151. Exemplarily, the gasket component is a copper gasket.

[0069] A cable installation method is used for hanging, clamping and sealing a double-layer cable coated with a first steel wire layer and a second steel wire layer on the outside of a cable polished rod. The method is implemented based on a sealing joint, wherein the sealing joint has a cylindrical hole for the cable to pass through and extends along an axis O, and the sealing joint comprises:

[0070] A connecting joint component 110 extending along the axis O and having a first end and a second end in an axial direction;

[0071] The upper joint component 100 is assembled on the first end of the connecting joint component 110;

[0072] The lower joint component 120 is assembled on the second end of the connecting joint component 110;

[0073] The third section 130 is defined by the inner wall of the connecting joint and the axial end faces of the upper joint component 100 and the lower joint component 120;

[0074] The ferrule assembly 140 is assembled in the third section 130, and the ferrule assembly 140 includes:

[0075] The sleeve member 141 has a first contact surface 141a;

[0076] The ferrule seat body 142 has a locking area 143 formed therein for accommodating the ferrule component 141 and has a second contact surface 142a. The first contact surface 141a and the second contact surface 142a are in contact with each other when the ferrule component 141 and the ferrule seat body 142 are assembled.

[0077] The above methods include:

[0078] Insert the cable from one end of the lower connector component 120, peel off the first steel wire layer and the second steel wire layer, and cut off the first steel wire layer;

[0079] Insert the above-mentioned electric cable into the above-mentioned sleeve component 141, and make the above-mentioned second steel wire layer and the above-mentioned first contact surface 141a fit together;

[0080] Insert the ferrule seat body 142 into the ferrule component 141, and assemble the ferrule component 141 and the ferrule seat body 142 as a whole into the third section 130 in the connecting joint component 110;

[0081] The connecting joint component 110 and the upper joint component 100 are assembled, and the cable polished rod is passed through the upper joint component 100 .

[0082] The sealing joint further comprises a sealing assembly 150 assembled in the upper joint component 100, wherein the sealing assembly 150 comprises a sealing packing 151 and a pressure cap component 152, and the method further comprises:

[0083] The cable polished rod passing through the clamping member 141 passes through the sealing packing 151 and passes through the pressure cap member 152;

[0084] A compressive force is applied to the sealing packing 151 through the pressure cap component 152 so that the sealing packing 151 holds the cable polished rod tightly.

[0085] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sealing joint, characterized in that: Used for clamping and sealing a double-wire layer armored cable, the sealing joint has a cylindrical hole for the cable to pass through and extending along the axis O, and the sealing joint comprises: A connecting joint component extending along the axis O and having a first axial end and a second axial end; an upper joint component, assembled on the first end of the connecting joint component; A lower joint component, assembled on the second end of the connecting joint component; A third section is defined by the inner wall of the connecting joint and the axial end faces of the upper joint component and the lower joint component; A ferrule assembly is assembled in the third interval, and the ferrule assembly includes: A ferrule component having a first contact surface; The ferrule seat body has a locking area for accommodating the ferrule component formed therein and has a second contact surface. The first contact surface and the second contact surface are in contact with each other when the ferrule component and the ferrule seat body are assembled.

2. A sealing joint according to claim 1, characterized in that: The first contact surface and the second contact surface are both configured as conical surfaces.

3. A sealing joint according to claim 1 or 2, characterized in that: The first contact surface and the second contact surface are provided with matching ferrule teeth.

4. A sealing joint according to claim 1 or 2, characterized in that: A first section is formed in the connecting joint component, the third section is configured as a part of the first section, and a part of the upper joint component can enter the first section and be connected to the connecting joint component.

5. A sealing joint according to claim 4, characterized in that: The partial section of the upper joint component entering the first interval is configured as a second step section, a second interval is formed between the outer wall of the second step section and the inner wall of the connecting joint component, and the second interval is connected to the third interval.

6. A sealing joint according to claim 1, characterized in that: The lower joint component has a second mounting portion, and a region for accommodating a mounting sleeve is formed in the second mounting portion.

7. A sealing joint according to claim 1, characterized in that: The connection positions of the connecting joint component, the upper joint component and the lower joint component are all sealed by sealing rings.

8. A sealing joint according to claim 1, characterized in that: The sealing joint further comprises a sealing assembly assembled in the sealing interval of the upper joint component, the sealing assembly comprising: a sealing packing configured to be compressible and to radially deform based on the compression; The pressure cap component is configured to be able to move linearly along the axis O to control the deformation of the sealing packing.

9. A sealing joint according to claim 8, characterized in that: The pressing cap component is threadedly connected to the upper joint component and has a protruding section extending from the sealing interval.

10. A sealing joint according to claim 9, characterized in that: The sealing assembly also includes a gasket component arranged between the sealing packing and the pressure cap component.

11. A method for installing a cable, wherein the cable comprises a cable polished rod and a first steel wire layer and a second steel wire layer covering the outer periphery of the cable polished rod, characterized in that: The method is implemented based on a sealing joint, the sealing joint having a cylindrical hole for the cable to pass through and extending along the axis O, the sealing joint comprising: A connecting joint component extending along the axis O and having a first axial end and a second axial end; an upper joint component, assembled on the first end of the connecting joint component; A lower joint component, assembled on the second end of the connecting joint component; A third section is defined by the inner wall of the connecting joint and the axial end faces of the upper joint component and the lower joint component; A ferrule assembly is assembled in the third interval, and the ferrule assembly includes: A ferrule component having a first contact surface; A ferrule seat body, in which a locking area for accommodating the ferrule member is formed, and a second contact surface is provided, wherein the first contact surface and the second contact surface are in contact with each other when the ferrule member and the ferrule seat body are assembled; The method comprises: Insert the cable from one end of the lower connector component, peel off the first steel wire layer and the second steel wire layer, and cut the first steel wire layer; Inserting the electric cable through the clamping member, and making the second steel wire layer fit the first contact surface; Insert the ferrule seat body into the ferrule component, and assemble the ferrule component and the ferrule seat body as a whole in the third section of the connecting joint component; The connecting joint component and the upper joint component are assembled, and the cable polished rod is passed through the upper joint component.

12. A cable installation method according to claim 11, characterized in that: The sealing joint further comprises a sealing assembly assembled in the upper joint component, wherein the sealing assembly comprises a sealing packing and a pressure cap component, and the method further comprises: Pass the cable polished rod passing through the clamping sleeve component through the sealing packing and out of the pressure cap component; A compressive force is applied to the sealing packing through a pressure cap component so that the sealing packing holds the cable polished rod tightly.

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