Tubing encapsulated cable

Abstract

The present application relates to a tubing encapsulated cable. The tubing encapsulated cable comprises: a protective tube; a first encapsulation layer, which is sleeved on the outer peripheral side of the protective tube; and an encapsulation strip, which is embedded on the first encapsulation layer, wherein the encapsulation strip comprises a first side and a second side arranged opposite each other; at least part of the first side of the encapsulation strip is fitted against the outer surface of the protective tube, or there is a gap between at least part of the first side of the encapsulation strip and the outer surface of the protective tube; and the second side of the encapsulation strip is flush with the outer side of the first encapsulation layer, or the second side of the encapsulation strip protrudes from the outer side of the first encapsulation layer. The encapsulation strip is stretched outward, such that the first encapsulation layer is torn from the inside out, thereby preventing local adhesion of the first encapsulation layer. Moreover, there is no need to form a groove in the first encapsulation layer, and the first encapsulation layer and the encapsulation strip can be fused together, thereby ensuring the functional strength of the first encapsulation layer, and preventing the protective tube from being damaged under the action of an external force.

Description

Encapsulated cable

[0001] Citation of relevant applications

[0002] This disclosure claims the full benefits of the following Chinese patent applications filed with the State Intellectual Property Office of the People's Republic of China on January 13, 2025: Application No. 202520073937.5, entitled "Encapsulated Cable"; Application No. 202520938133.7, entitled "Encapsulated Cable"; Application No. 202520073743.5, entitled "Encapsulated Cable"; and Application No. 202520073272.8, entitled "Encapsulated Cable"; the entire contents of which are incorporated herein by reference.

[0003] field

[0004] This application relates to the field of logging cable technology, and in particular to a packaged cable and a packaged cable for detection.

[0005] background

[0006] Logging cables can be used for logging, perforation, and coring operations in various oil and gas fields, as well as in hydraulic and hydrological surveying, coalfield geological exploration, and geothermal logging. They serve as load-bearing connections and data transmission lines between surface systems and underground instruments. Existing encapsulated cables have an encapsulation layer that protects the internal pipes and cables. However, when connecting to equipment, a portion of the encapsulation layer needs to be peeled off. Finding a quick, safe, and economical way to peel off this layer has become a major challenge.

[0007] In related technologies, two methods are generally used for peeling: direct peeling with a knife and peeling with a tear rope. Direct peeling with a knife carries the risk of scratching the pipe and injuring people. Peeling with a tear rope requires designing a U-shaped groove in the pipe's encapsulation layer, with the tear rope pre-embedded inside. However, the tear rope reduces the thickness of the encapsulation layer, easily causing the thinnest point of the encapsulation layer to fail, thus weakening its functional strength.

[0008] Overview

[0009] This application provides a packaged cable to solve the technical problem that the use of tear cords in existing packaged cables reduces the thickness of the packaged layer, easily causing the thinnest point of the packaged layer to fail and weakening the functional strength of the packaged layer.

[0010] This application provides a packaged cable, comprising: a protective tube; a first packaging layer sleeved on the outer periphery of the protective tube; and a packaging strip embedded in the first packaging layer. The packaging strip includes a first side and a second side disposed opposite to each other. The first side of the packaging strip is at least partially attached to the outer surface of the protective tube, or the first side of the packaging strip has at least a gap with the outer surface of the protective tube. The second side of the packaging strip is flush with the outer side of the first packaging layer, or the second side of the packaging strip protrudes relative to the outer side of the first packaging layer.

[0011] The encapsulated cable provided in this application has the following advantages compared with the prior art:

[0012] The encapsulated cable provided in this application, when in use, involves stretching the encapsulation strip outwards, which cuts the first encapsulation layer wrapped around the protective tube, exposing the inner protective tube. This facilitates connection of the protective tube to equipment in the mine or on the surface. Since the first side of the encapsulation strip connects to the protective tube, and the second side extends radially towards the protective tube and connects to the outside of the first encapsulation layer, the encapsulation strip provides significant shearing force, causing the first encapsulation layer to tear from the inside out. This prevents localized adhesion of the first encapsulation layer and reduces the workload for workers. Compared to existing technologies, the encapsulated cable provided in this application does not require slotting in the first encapsulation layer, thus maintaining its thickness. The first encapsulation layer and the encapsulation strip can be fused together, ensuring the functional strength of the first encapsulation layer and preventing damage to the protective tube due to external forces. Furthermore, it avoids scratching the tube groove when peeling off the first encapsulation layer with a knife and improves the safety of the peeling process.

[0013] This application also provides a packaged cable to solve the technical problem that the use of tear cord in existing packaged cables reduces the thickness of the first packaged layer, which can easily cause the thinnest point of the first packaged layer to fail and weaken the functional strength of the first packaged layer.

[0014] To solve the above-mentioned technical problems, this application adopts the following technical solution:

[0015] An encapsulated cable includes: a protective tube; a first encapsulation layer sleeved on the outer periphery of the protective tube; and an encapsulation strip embedded in the first encapsulation layer, wherein at least a portion of the encapsulation strip has a gap with the outer surface of the protective tube, and the encapsulation strip has a gap with the outer side of the first encapsulation layer.

[0016] The encapsulated cable provided in this application has the following advantages compared with the prior art:

[0017] The encapsulated cable provided in this application, when in use, involves stretching the encapsulation strip outwards, which cuts the first encapsulation layer wrapped around the protective tube, exposing the inner protective tube. This facilitates connection of the protective tube to equipment in the mine or on the surface. Simultaneously, the encapsulation strip has a certain thickness, providing significant shearing force to tear the first encapsulation layer from the inside out, preventing localized adhesion and reducing labor intensity. A gap exists between the encapsulation strip and the outer side of the first encapsulation layer, allowing the first encapsulation layer to cover the encapsulation strip, thus preventing cracking at the connection point. Compared to existing technologies, the encapsulated cable provided in this application does not require slotting in the first encapsulation layer, thus maintaining its thickness. The first encapsulation layer and encapsulation strip can be fused together, ensuring the functional strength of the first encapsulation layer and preventing damage to the protective tube from external forces. Furthermore, it avoids scratching the tube groove when peeling off the first encapsulation layer with a knife and improves the safety of the peeling process.

[0018] This application also provides a packaged cable to solve the technical problem that existing packaged cables quickly lose their functionality when they catch fire, preventing workers from taking emergency measures in a short time and thus causing losses.

[0019] To solve the above-mentioned technical problems, this application adopts the following technical solution:

[0020] An encapsulated cable includes: at least one cable body; a fireproof layer disposed on the outer periphery of the at least one cable body; and a second encapsulation layer disposed on the outer periphery of the fireproof layer.

[0021] The encapsulated cable provided in this application has the following advantages compared with the prior art:

[0022] The encapsulated cable provided in this application has a fireproof layer between the second encapsulation layer and the cable body. The fireproof layer improves the overall fire resistance of the encapsulated cable and can maintain normal operation for a certain period of time when it is in a fire, giving the staff time to take emergency measures and thus reducing or avoiding losses caused by fire.

[0023] This application also provides a packaged cable to solve the technical problems of existing packaged cables often having cracks in the packaged layer during use; and the cable being damaged in the event of a fire or excessive temperature.

[0024] To solve the above-mentioned technical problems, this application adopts the following technical solution:

[0025] A detection encapsulation cable includes a conductive core. From the inside to the outside, a third insulation layer, a protective tube, and a third encapsulation layer are sequentially disposed on the outer side of the conductive core. A plurality of through slots are disposed on the outer surface of the encapsulation layer, and the through slots extend along the length direction of the conductive core.

[0026] The encapsulated cable provided in this application has the following advantages compared with the prior art:

[0027] The encapsulated cable provided in this application can not only clearly identify the weak points on the logging cable, but also solve the problem of easy cracking of the encapsulation material, thereby improving the tensile strength, compressive strength, corrosion resistance, fire resistance and cable life performance of the logging cable.

[0028] Brief description of the attached figures

[0029] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0030] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0031] Figure 1 is a structural schematic diagram of a first type of encapsulated cable provided in one embodiment of this application;

[0032] Figure 2 is a front view of the packaged cable shown in Figure 1;

[0033] Figure 3a is a perspective view of a packaged cable provided in another embodiment of this application;

[0034] Figure 3b is a perspective view of the encapsulated cable provided in another embodiment of this application;

[0035] Figure 4 is a perspective view of a packaged cable provided in another embodiment of this application;

[0036] Figure 5 is a perspective view of a packaged cable provided in another embodiment of this application;

[0037] Figure 6 is a perspective view of a packaged cable provided in another embodiment of this application;

[0038] Figure 7 is a perspective view of a packaged cable provided in another embodiment of this application;

[0039] Figure 8 is a perspective view of the second type of encapsulated cable provided in the embodiments of this application;

[0040] Figure 9 is a front view of the packaged cable shown in Figure 8;

[0041] Figure 10 is a perspective view of a packaged cable provided in another embodiment of this application;

[0042] Figure 11 is a front view of the packaged cable shown in Figure 10;

[0043] Figure 12 is a perspective view of a packaged cable provided in another embodiment of this application;

[0044] Figure 13 is a perspective view of a packaged cable provided in another embodiment of this application;

[0045] Figure 14 is a front view of the encapsulated cable shown in Figure 13;

[0046] Figure 15 is a perspective view of a packaged cable provided in another embodiment of this application;

[0047] Figure 16 is a front view of the packaged cable shown in Figure 15;

[0048] Figure 17 is a perspective view of a packaged cable provided in another embodiment of this application;

[0049] Figure 18 is a perspective view of a packaged cable provided in another embodiment of this application;

[0050] Figure 19 shows a cross-sectional view of the third type of encapsulated cable provided in the embodiments of this application;

[0051] Figure 20 shows a cross-sectional view of the encapsulated cable provided in another embodiment of this application;

[0052] Figure 21 shows a schematic diagram of the structure of the encapsulated cable shown in Figure 20 with grooves set on the encapsulation layer;

[0053] Figure 22 shows a cross-sectional view of a single cable encapsulation tube provided in an embodiment of this application;

[0054] Figure 23 shows a cross-sectional schematic diagram of a packaged cable for optical fiber and transmission tube provided in an embodiment of this application;

[0055] Figure 24 is a cross-sectional view of one of the fourth type of encapsulated cable provided in the embodiments of this application;

[0056] Figure 25 is a second cross-sectional view of the encapsulated cable according to an embodiment of this application;

[0057] Figure 26 is a cross-sectional view of the encapsulated cable according to an embodiment of this application;

[0058] Figure 27 is a cross-sectional view of a packaged cable according to another embodiment of this application.

[0059] In the diagram: 1. Protective tube; 2. First encapsulation layer; 201. First end; 202. Second end; 21. First encapsulation part; 22. Second encapsulation part; 3. Encapsulation strip; 31. First side; 32. Second side; 33. Protrusion; 34. First encapsulation body; 35. Second encapsulation body; 36. First reinforcing rib; 4. Cable; 41. First conductor; 42. First insulation layer; 43. First filling layer; 100. Cable body; 110. Cable; 111. Second insulation layer; 112. Second conductor; 120. Optical fiber; 130. Delivery tube; 140. Metal tube; 150. Second filling layer; 200. Fireproof layer; 300. Second encapsulation layer; 310. Identification part; 320. Marking part; 400. Second reinforcing rib; 5. Through groove; 6. Third encapsulation layer; 61. Thermoplastic material layer; 62. Ceramic layer; 7. Tensile strength; 8. Sheath; 9. Non-metallic filler layer; 10. Third insulation layer; 11. Conductive core.

[0060] Detailed Explanation

[0061] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0062] The embodiments of the encapsulated cable provided in this application will be described below with reference to the accompanying drawings.

[0063] In one embodiment of the encapsulated cable of this application, referring to Figures 1 and 2, Figures 1 and 2 show an encapsulated cable provided by this application, including a protective tube 1, a first encapsulation layer 2, and an encapsulation strip 3. The first encapsulation layer 2 is sleeved on the outer periphery of the protective tube 1; the encapsulation strip 3 is embedded on the first encapsulation layer 2, and the encapsulation strip 3 includes a first side 31 and a second side 32 disposed opposite to each other. The first side 31 of the encapsulation strip 3 is at least partially attached to the outer surface of the protective tube 1, or the first side 31 of the encapsulation strip 3 has at least a gap with the outer surface of the protective tube 1; the second side 32 of the encapsulation strip 3 is flush with the outer side of the first encapsulation layer 2, or the second side 32 of the encapsulation strip 3 protrudes relative to the outer side of the first encapsulation layer 2.

[0064] It should be noted that the inner and outer sides of the first encapsulation layer 2 are relative to the protective tube 1. The inner side of the first encapsulation layer 2 refers to the inner surface of the first encapsulation layer 2 that contacts the protective tube 1, and the outer side of the first encapsulation layer 2 refers to the outer surface of the first encapsulation layer 2 that is away from the protective tube 1. The radial direction of the protective tube 1 can be the Z-direction shown in the figure, and the axial direction of the protective tube can be the X-direction shown in the figure. The first side 31 of the encapsulation strip 3 is at least partially attached to the outer surface of the protective tube 1, or the first side 31 of the encapsulation strip 3 has at least a gap with the outer surface of the protective tube 1. That is to say, the second side 32 of the encapsulation strip 3 extends radially towards the protective tube 1. The second side 32 of the encapsulation strip 3 is flush with the outer side of the first encapsulation layer 2, or the second side 32 of the encapsulation strip 3 protrudes relative to the outer side of the first encapsulation layer 2, so that the encapsulation strip 3 has a certain thickness in the radial direction of the protective tube 1. This can ensure the overall functional strength of the first encapsulation layer 2, and at the same time, the encapsulation strip 3 has a certain tear resistance. Understandably, during use, by stretching the encapsulation strip 3 outward, the encapsulation strip 3 cuts the first encapsulation layer 2 wrapped around the protective tube 1, exposing the inner protective tube 1, making it convenient for workers to connect the protective tube 1 to equipment in the mine or on the surface. Because the encapsulation strip 3 has a certain thickness, it can provide significant shearing force, causing the first encapsulation layer 2 to tear from the inside out, preventing local adhesion of the first encapsulation layer 2 and reducing the workload for workers. Compared to existing technologies, the encapsulated cable provided in this embodiment does not require slotting in the first encapsulation layer 2, thus not reducing the thickness of the first encapsulation layer 2. The first encapsulation layer 2 and the encapsulation strip 3 can be fused together, ensuring the functional strength of the first encapsulation layer 2 and preventing damage to the protective tube 1 due to external forces. Simultaneously, it avoids scratching the protective tube 1 by peeling off the first encapsulation layer 2 with a knife and improves the safety of the peeling process.

[0065] In some embodiments, the cross-section of the outer side of the first encapsulation layer 2 can be polygonal or circular, and the minimum thickness of the first encapsulation layer 2 is greater than or equal to 2 mm. In one example, as shown in Figure 3a, the cross-section of the outer side of the first encapsulation layer 2 is circular, and the thickness of the first encapsulation layer 2 is uniformly distributed, with a thickness greater than or equal to 2 mm. In another example, as shown in Figure 2, the cross-section of the outer side of the first encapsulation layer 2 is square. Since the cross-section of the protective tube 1 is circular, the thickness of the first encapsulation layer 2 will change along the axial direction of the protective tube 1, that is, the first encapsulation layer 2 has a minimum thickness in the radial direction of the protective tube 1, and the minimum thickness is greater than or equal to 2 mm. This configuration ensures the functional strength of the first encapsulation layer 2 and avoids structural strength defects caused by the thinnest point of the first encapsulation layer 2 being too thin.

[0066] In an embodiment not shown in the figure, a groove or opening is provided at the connection between the encapsulation strip 3 and the first encapsulation layer 2. When the encapsulation strip 3 is stretched outward, stress concentration occurs at this point due to the groove or opening, making it easier to tear the first encapsulation layer 2. In this embodiment, the first encapsulation layer 2 can be made of a thermoplastic material, and the encapsulation strip 3 is also made of the same thermoplastic material as the first encapsulation layer 2. That is, the encapsulation strip 3 may not have the first reinforcing rib 36, and the first encapsulation layer 2 can be torn apart by the stress concentration at the groove or opening.

[0067] In one embodiment, as shown in FIG1, the first encapsulation layer 2 extends along the axial direction of the protective tube 1. The first encapsulation layer 2 has a first end 201 and a second end 202 disposed opposite to each other. The encapsulation strip 3 extends from the first end 201 to the second end 202 of the first encapsulation layer 2. It can be understood that the first encapsulation layer 2 extending along the axial direction of the protective tube 1 can effectively protect the protective tube 1 and improve the corrosion resistance of the protective tube 1. The protective tube 1 has a high yield load, which improves the overall compressive and tensile properties. The first encapsulation layer 2 has a first end 201 and a second end 202 disposed opposite to each other. The encapsulation strip 3 extends from the first end 201 to the second end 202 of the first encapsulation layer 2. That is, by stretching the encapsulation strip 3 outward, the encapsulation strip 3 can continuously provide shear force to the first encapsulation layer 2, and the first encapsulation layer 2 is torn under the action of this shear force.

[0068] In one embodiment, as shown in Figure 1, the length direction of the encapsulation strip 3 is parallel to the axial direction of the protective tube 1. Regardless of whether the cross-section of the outer side of the first encapsulation layer 2 is polygonal or circular, the length direction of the encapsulation strip 3 can be parallel to the axial direction of the protective tube 1. Stretching the encapsulation strip 3 outwards allows it to cut along its own length direction, exposing the inner protective tube 1 and facilitating connection of the protective tube 1 to equipment in the mine or on the surface. With the outer cross-section of the first encapsulation layer 2 being polygonal, the encapsulation strip 3 is embedded at the thinnest point of the first encapsulation layer 2. This arrangement, because the encapsulation strip 3 is located at the thinnest point of the first encapsulation layer 2, facilitates the peeling of the first encapsulation layer 2 by the operator.

[0069] In one embodiment, as shown in Figure 4, the encapsulation strip 3 is spirally coiled around the axis of the protective tube 1. In this embodiment, the cross-section of the outer side of the first encapsulation layer 2 is circular, and the encapsulation strip 3 is spirally coiled around the axis of the protective tube 1, which is shown as T in Figure 4. By stretching the encapsulation strip 3 outward, the encapsulation strip 3 can cut the first encapsulation layer 2 along its own length. Due to the spiral winding arrangement of the encapsulation strip 3, the first encapsulation layer 2 is easier to peel off, exposing the inner protective tube 1, which facilitates the connection of the protective tube 1 to equipment in the mine or on the surface.

[0070] In some embodiments, as shown in FIG3b, a first reinforcing rib 36 is provided inside the encapsulation strip. For example, the length direction of the encapsulation strip 3 is parallel to the axial direction of the protective tube 1, and the first reinforcing rib 36 can extend along the axial direction of the protective tube 1; the encapsulation strip 3 is spirally coiled around the axis of the protective tube 1, and the first reinforcing rib 36 can extend spirally along the circumferential direction of the protective tube 1. By providing the first reinforcing rib 36, the tear resistance of the encapsulation strip can be improved.

[0071] For example, the first encapsulation layer 2 can be made of thermoplastic materials, such as thermoplastic vulcanizate (TPV), polypropylene (PP), fluorinated ethylene propylene copolymer (FEP), or polyvinylidene difluoride (PVDF). The encapsulation strip 3 can be a plastic synthetic strip made of a substrate and a first reinforcing rib 36. The substrate is made of the same thermoplastic material as the first encapsulation layer 2, and the first reinforcing rib 36 is made of polyaramid synthetic fiber, Kevlar fiber, or metal wire. This allows the encapsulation strip 3 to have strong tear resistance on the one hand, and to ensure the fusion of the first encapsulation layer 2 and the encapsulation strip 3 on the other hand.

[0072] In some embodiments, multiple sealing strips 3 are provided. When the cross-section of the outer side of the first sealing layer 2 is polygonal, at least two sealing strips 3 are respectively provided on adjacent sides of the first sealing layer 2. It is understood that by providing multiple sealing strips 3, the operator can pull outwards multiple sealing strips 3 respectively, and the multiple sealing strips 3 can cut the first sealing layer 2 wrapped on the protective tube 1, avoiding local adhesion of the first sealing layer 2, and the first sealing layer 2 can be completely peeled off, thereby saving the operator's labor intensity.

[0073] In a preferred embodiment, as shown in FIG5, multiple encapsulation strips 3 are provided. When the cross-section of the outer side of the first encapsulation layer 2 is set as a polygon, two encapsulation strips 3 are respectively provided on opposite sides of the first encapsulation layer 2. It can be understood that, since at least two encapsulation strips 3 are respectively provided on opposite sides of the first encapsulation layer 2, and the two encapsulation strips 3 are stretched outward, the opposite sides of the first encapsulation layer 2 are respectively subjected to a cutting force in the radial direction away from the cable 4, making it easier to completely peel off the encapsulation strips 3.

[0074] Of course, multiple encapsulation strips 3 can also be simultaneously disposed on adjacent sides of the first encapsulation layer 2, as well as on opposite sides of the first encapsulation layer 2.

[0075] In one embodiment, as shown in Figure 1, the encapsulation strip 3 is provided with a protrusion 33, which protrudes from either the first end 201 or the second end 202 of the first encapsulation layer 2. It is understood that by providing the protrusion 33, it is convenient for workers to apply external force, pinch the protrusion 33, and pull the encapsulation strip 3 outward. The encapsulation strip 3 cuts the first encapsulation layer 2 wrapped around the protective tube 1, exposing the inner protective tube 1, making it convenient for workers to connect the protective tube 1 to equipment in the mine or on the surface.

[0076] For example, the protrusion 33 can be shaped as a cuboid, a cone, or a wedge. The protrusion 33 can extend along the axial direction of the protective tube 1 or along the radial direction of the protective tube 1. Of course, the protrusion 33 can extend along other directions, and this application does not impose any specific limitations on this.

[0077] In one embodiment, as shown in Figure 1, multiple protective tubes 1 are provided, spaced apart along the width direction of the first encapsulation layer 2. Multiple encapsulation strips 3 are also provided, each corresponding to one of the protective tubes 1. For ease of explanation and understanding, the width direction of the first encapsulation layer 2 can be the Y-direction shown in the figure. The cross-section of the outer side of the first encapsulation layer 2 can be polygonal. The multiple encapsulation strips 3 correspond one-to-one with the protective tubes 1 and are located at the minimum thickness of the first encapsulation layer 2. Workers can sequentially stretch the multiple encapsulation strips 3 outwards. Each encapsulation strip 3 can cut the first encapsulation layer 2 along its own length direction, thus exposing the multiple protective tubes 1 sequentially, facilitating the connection of the protective tubes 1 to equipment in the mine or on the surface.

[0078] In one embodiment, multiple encapsulation strips 3 are configured with different colors according to the different functions of the protective tubes 1. In this embodiment, the different colors of the protective tubes within the encapsulation cable are used to identify the different functions of each protective tube. For example, if the function of the protective tube is to run cables or optical fibers inside to transmit electrical energy or communication signals, then the encapsulation strip corresponding to that protective tube can be marked blue; if the function of the protective tube is to inject chemical agents, then the encapsulation strip corresponding to that protective tube can be marked green; if the function of the protective tube is to circulate lubricating oil or cleaning agents to lubricate or clean the equipment, then the encapsulation strip corresponding to that protective tube can be marked red. This arrangement allows for the identification of the protective tube 1 when it is connected to equipment in the mine or on the surface, facilitating on-site construction.

[0079] In one embodiment, as shown in FIG6, the first encapsulation layer 2 includes a first encapsulation part 21 and a second encapsulation part 22. The first encapsulation part 21 is sleeved on the outer periphery of the protective tube 1, and the second encapsulation part 22 is sleeved on the outer periphery of the first encapsulation part 21. The encapsulation strip 3 includes a first encapsulation body 34 and a second encapsulation body 35. The first encapsulation body 34 is embedded on the first encapsulation part 21, and the second encapsulation body 35 is embedded on the second encapsulation part 22. The first encapsulation body 34 and the second encapsulation body 35 are stacked in the radial direction of the protective tube 1. The first encapsulation body 34 and the second encapsulation body 35 are stacked in the radial direction of the protective tube 1. This arrangement is suitable for encapsulated cables with special requirements. For example, a single protective tube 1 of the encapsulated cable is covered with a separate first encapsulation part 21. The first encapsulation body 34 is used to tear the first encapsulation part 21. Several other protective tubes 1 are then combined to cover another layer of the overall first encapsulation layer 2, namely the second encapsulation part 22. The second encapsulation body 35 is used to tear the outer overall second encapsulation part 22. In use, the second encapsulation body 35 can be stretched first to peel off the second encapsulation part 22, and then the first encapsulation body 34 can be stretched to peel off the first encapsulation part 21.

[0080] In one embodiment, as shown in Figure 7, a cable 4 is disposed inside the protective tube. The cable 4 includes a first conductor 41, a first insulating layer 42, and a first filling layer 43, arranged sequentially from the inside to the outside. The cable 4 is used to connect downhole instruments and equipment to transmit signals. In this embodiment, the first filling layer 43 is made of polypropylene (PP) material. The first insulating layer 42 is made of fluorinated ethylene propylene copolymer (FEP) material. The first filling layer 43 can provide insulation, flame retardancy, corrosion protection, and fixation protection for the covered material. The cable 4 is produced by a cable extrusion machine, which is a conventional technical method and will not be described in detail here.

[0081] As shown in Figures 8 to 19, a packaged cable provided in this application includes a protective tube 1, a first packaging layer 2, and a packaging strip 3. The first packaging layer 2 is sleeved on the outer periphery of the protective tube 1. The packaging strip 3 is embedded on the first packaging layer 2. At least a portion of the packaging strip 3 has a gap with the outer surface of the protective tube 1, and the packaging strip 3 has a gap with the outer side of the first packaging layer 2.

[0082] At least a portion of the encapsulation strip 3 has a gap L1 with the outer surface of the protective tube 1. Specifically, in some exemplary embodiments, as shown in Figures 8, 9, 12, 13, and 14, the surface of the encapsulation strip 3 does not contact the outer surface of the protective tube 1. In other exemplary embodiments, as shown in Figures 10, 11, 15, 16, and 18, a portion of the surface of the encapsulation strip 3 may abut against the outer surface of the protective tube 1, while another portion of the surface has a gap with the outer surface of the protective tube 1. The encapsulation strip 3 has a gap L2 with the outer side of the first encapsulation layer 2. Specifically, the surface of the encapsulation strip 3 does not contact the outer side of the first encapsulation layer 2, and the encapsulation strip 3 is embedded inside the first encapsulation layer 2. L1 can be set to be equal to L2, or L1 and L2 can be set to be unequal.

[0083] It should be noted that the inner and outer sides of the first encapsulation layer 2 are relative to the protective tube 1. The inner side of the first encapsulation layer 2 refers to the inner surface of the first encapsulation layer 2 that contacts the protective tube 1, and the outer side of the first encapsulation layer 2 refers to the outer surface of the first encapsulation layer 2 that faces away from the protective tube 1. The radial direction of the protective tube 1 can be the Z-direction shown in the figure, and the axial direction of the protective tube can be the X-direction shown in the figure. The encapsulation strip 3 is embedded in the first encapsulation layer 2. Since at least a portion of the encapsulation strip 3 has a gap with the outer surface of the protective tube 1, and there is a gap between the encapsulation strip 3 and the outer side of the first encapsulation layer 2, the first encapsulation layer 2 has a certain thickness in the radial direction of the protective tube 1. This ensures the overall functional strength of the first encapsulation layer 2, while the encapsulation strip 3 has a certain tear resistance. It can be understood that during use, by stretching the encapsulation strip 3 outward, the encapsulation strip 3 cuts the first encapsulation layer 2 wrapped around the protective tube 1, exposing the inner protective tube 1, making it convenient for workers to connect the protective tube 1 to equipment in the mine or on the surface. Meanwhile, the sealing strip 3 has a certain thickness and can provide a large shearing force, so that the first sealing layer 2 is torn from the inside out, avoiding the local adhesion of the first sealing layer 2, which can save the labor intensity of the staff.

[0084] For example, the first encapsulation layer 2 can be made of a thermoplastic material, such as a fluoroplastic structure, giving it corrosion resistance, high temperature resistance, wear resistance, and tensile strength. The encapsulation strip 3 is also made of the same thermoplastic material as the first encapsulation layer 2. Alternatively, the first encapsulation layer 2 can be made of a thermoplastic material, while the encapsulation strip 3 can be made of a different material. For example, the encapsulation strip 3 can be a plastic composite strip made of a substrate and a first reinforcing rib 36, where the substrate is made of the same thermoplastic material as the first encapsulation layer 2, and the first reinforcing rib 36 is made of polyaramid synthetic fiber, Kevlar fiber, or metal wire. Alternatively, the first encapsulation layer 2 can be made of a ceramicized material, giving it fire-retardant, fire-blocking, heat-insulating, heat-preserving, and insulating properties. Therefore, in some embodiments, because the materials of the first encapsulation layer 2 and the encapsulation strip 3 are different, cracking is likely to occur at the connection between them. However, because there is a gap between the encapsulation strip 3 and the outer side of the first encapsulation layer 2, the first encapsulation layer 2 can cover the encapsulation strip 3, thus preventing cracking.

[0085] In addition, the cross-section of the encapsulation strip 3 can be set to a circular, elliptical or other shapes, and this application does not impose specific restrictions on it.

[0086] In some embodiments, the cross-section of the outer side of the first encapsulation layer 2 can be polygonal or circular, and the minimum thickness of the first encapsulation layer 2 is greater than or equal to 2 mm. In some embodiments, as shown in Figures 8 and 9, the cross-section of the outer side of the first encapsulation layer 2 is circular, the thickness of the first encapsulation layer 2 is uniformly distributed, and the thickness H1 of the first encapsulation layer 2 is greater than or equal to 2 mm; in some embodiments, as shown in Figures 10 to 18, the cross-section of the outer side of the first encapsulation layer 2 is square. Since the cross-section of the protective tube 1 is circular, the thickness of the first encapsulation layer 2 will change along the radial direction of the protective tube 1, that is, the first encapsulation layer 2 has a minimum thickness in the radial direction of the protective tube 1, and the minimum thickness H2 is greater than or equal to 2 mm. This setting can ensure the functional strength of the first encapsulation layer 2 and avoid the structural strength being unqualified due to the thinnest point of the first encapsulation layer 2 being too thin.

[0087] In an embodiment not shown in the figure, a groove or opening is provided at the connection between the encapsulation strip 3 and the first encapsulation layer 2. When the encapsulation strip 3 is stretched outward, stress concentration occurs at this point due to the groove or opening, making it easier to tear the first encapsulation layer 2. In this embodiment, the first encapsulation layer 2 can be made of a thermoplastic material, and the encapsulation strip 3 is also made of the same thermoplastic material as the first encapsulation layer 2. That is, the encapsulation strip 3 may not have the first reinforcing rib 36, and the first encapsulation layer 2 can be torn apart by the stress concentration at the groove or opening.

[0088] In some embodiments, as shown in FIG8, the first encapsulation layer 2 extends along the axial direction of the protective tube 1. The first encapsulation layer 2 has a first end 201 and a second end 202 disposed opposite to each other. The encapsulation strip 3 extends from the first end 201 to the second end 202 of the first encapsulation layer 2. It can be understood that the first encapsulation layer 2 extending along the axial direction of the protective tube 1 can effectively protect the protective tube 1 and improve the corrosion resistance of the protective tube 1. The protective tube 1 has a high yield load, which improves the overall compressive and tensile properties. The first encapsulation layer 2 has a first end 201 and a second end 202 disposed opposite to each other. The encapsulation strip 3 extends from the first end 201 to the second end 202 of the first encapsulation layer 2. That is, by stretching the encapsulation strip 3 outward, the encapsulation strip 3 can continuously provide shear force to the first encapsulation layer 2, and the first encapsulation layer 2 is torn under the action of this shear force.

[0089] In some embodiments, as shown in FIG8, the length direction of the encapsulation strip 3 is parallel to the axial direction of the protective tube 1. Regardless of whether the cross-section of the outer side of the first encapsulation layer 2 is polygonal or circular, the length direction of the encapsulation strip 3 can be parallel to the axial direction of the protective tube 1. Stretching the encapsulation strip 3 outwards allows it to cut along its own length direction, exposing the inner protective tube 1 and facilitating connection of the protective tube 1 to equipment in the mine or on the surface. With the outer cross-section of the first encapsulation layer 2 being polygonal, the encapsulation strip 3 is embedded at the thinnest point of the first encapsulation layer 2. This arrangement, with the encapsulation strip 3 located at the thinnest point of the first encapsulation layer 2, facilitates the peeling of the first encapsulation layer 2 by the operator.

[0090] In some embodiments, a first reinforcing rib 36 is provided within the encapsulation strip. For example, the length direction of the encapsulation strip 3 is parallel to the axial direction of the protective tube 1, and the first reinforcing rib 36 can extend along the axial direction of the protective tube 1; the encapsulation strip 3 is spirally coiled around the axis of the protective tube 1, and the first reinforcing rib 36 can extend spirally along the circumferential direction of the protective tube 1. By providing the first reinforcing rib 36, the tear resistance of the encapsulation strip can be improved.

[0091] For example, the first encapsulation layer 2 can be made of thermoplastic material, and the encapsulation strip 3 can be set as a plastic synthetic strip made of a substrate and a first reinforcing rib 36. The substrate is made of the same thermoplastic material as the first encapsulation layer 2, thereby improving the fusion of the first encapsulation layer 2 and the encapsulation strip 3. The first reinforcing rib 36 is made of polyaramid synthetic fiber, Kevlar fiber or metal wire, so that the encapsulation strip 3 has strong tear resistance.

[0092] In some embodiments, multiple sealing strips 3 are provided. When the cross-section of the outer side of the first sealing layer 2 is polygonal, at least two sealing strips 3 are respectively provided on adjacent sides of the first sealing layer 2. It is understood that by providing multiple sealing strips 3, the operator can pull outwards multiple sealing strips 3 respectively, and the multiple sealing strips 3 can cut the first sealing layer 2 wrapped on the protective tube 1, avoiding local adhesion of the first sealing layer 2, and the first sealing layer 2 can be completely peeled off, thereby saving the operator's labor intensity.

[0093] In some embodiments, as shown in FIG12, multiple encapsulation strips 3 are provided. When the cross-section of the outer side of the first encapsulation layer 2 is set as a polygon, two encapsulation strips 3 are respectively provided on opposite sides of the first encapsulation layer 2. It can be understood that, since at least two encapsulation strips 3 are respectively provided on opposite sides of the first encapsulation layer 2, and the two encapsulation strips 3 are stretched outward at the same time, the opposite sides of the first encapsulation layer 2 are respectively subjected to a cutting force in the radial direction away from the cable 4, making it easier to completely peel off the encapsulation strips 3.

[0094] Of course, multiple encapsulation strips 3 can also be simultaneously disposed on adjacent sides of the first encapsulation layer 2, as well as on opposite sides of the first encapsulation layer 2.

[0095] In some embodiments, as shown in FIG13, the encapsulation strip 3 is provided with a protrusion 33, which protrudes from the first end 201 of the first encapsulation layer 2; or, the protrusion 33 protrudes from the second end 202 of the first encapsulation layer 2; or, as shown in FIG12, the encapsulation strip 3 is provided with protrusions 33 at both ends in its length direction, one of which protrudes from the first end 201 of the first encapsulation layer 2, and the other protrusion protrudes from the second end 202 of the first encapsulation layer 2. It can be understood that by providing the protrusions 33, it is convenient for workers to apply external force, pinch the protrusions 33, and stretch the encapsulation strip 3 outwards. The encapsulation strip 3 cuts the first encapsulation layer 2 wrapped around the protective tube 1, exposing the inner protective tube 1, making it convenient for workers to connect the protective tube 1 to equipment in the mine or on the surface.

[0096] For example, the protrusion 33 can be shaped as a cuboid, a cone, or a wedge. The protrusion 33 can extend along the axial direction of the protective tube 1 or along the radial direction of the protective tube 1. Of course, the protrusion 33 can extend along other directions, and this application does not impose any specific limitations on this.

[0097] In one embodiment, as shown in Figure 13, multiple protective tubes 1 are provided, spaced apart along the width direction of the first encapsulation layer 2. Multiple encapsulation strips 3 are also provided, each corresponding to one of the protective tubes 1. For ease of explanation and understanding, the width direction of the first encapsulation layer 2 can be the Y-direction shown in the figure. The cross-section of the outer side of the first encapsulation layer 2 can be polygonal. The multiple encapsulation strips 3 correspond one-to-one with the protective tubes 1 and are located at the minimum thickness of the first encapsulation layer 2. Workers can sequentially stretch the multiple encapsulation strips 3 outwards. Each encapsulation strip 3 can cut the first encapsulation layer 2 along its own length direction, thus exposing the multiple protective tubes 1 sequentially, facilitating the connection of the protective tubes 1 to equipment in the mine or on the surface.

[0098] In some embodiments, as shown in FIG14, the distance between the central axes of the plurality of encapsulation strips 3 and the outer side of the first encapsulation layer 2 is equal, that is, the gap between the plurality of encapsulation strips 3 and the outer side of the first encapsulation layer 2 is the same, thereby facilitating manufacturing. Alternatively, as shown in FIGS.15 and 16, the distance between the central axes of at least two encapsulation strips 3 and the outer side of the first encapsulation layer 2 is not equal, and the gap between the plurality of encapsulation strips 3 and the outer side of the first encapsulation layer 2 can also be set to be different. This application does not impose specific limitations on this.

[0099] In some embodiments, multiple encapsulation strips 3 are configured with different colors according to the different functions of the protective tubes 1. In this embodiment, the different colors are used to identify the different functions of each protective tube 1 within the encapsulation cable. For example, if the function of the protective tube 1 is to run cables or optical fibers through it to transmit electrical energy or communication signals, then the encapsulation strip corresponding to that protective tube 1 can be identified as blue; if the function of the protective tube 1 is to inject chemical agents, then the encapsulation strip corresponding to that protective tube 1 can be identified as green; if the function of the protective tube 1 is to allow the flow of lubricating oil or cleaning agents to lubricate or clean the equipment, then the encapsulation strip corresponding to that protective tube 1 can be identified as red. This configuration allows for the identification of the protective tube 1 when it is connected to equipment in the mine or on the surface, facilitating on-site construction.

[0100] In some embodiments, as shown in FIG17, the first encapsulation layer 2 includes a first encapsulation portion 21 and a second encapsulation portion 22. The first encapsulation portion 21 is sleeved on the outer periphery of the protective tube 1, and the second encapsulation portion 22 is sleeved on the outer periphery of the first encapsulation portion 21. The encapsulation strip 3 includes a first encapsulation body 34 and a second encapsulation body 35. The first encapsulation body 34 is embedded on the first encapsulation portion 21, and the second encapsulation body 35 is embedded on the second encapsulation portion 22. The first encapsulation body 34 and the second encapsulation body 35 are stacked in the radial direction of the protective tube 1. The first encapsulation body 34 and the second encapsulation body 35 are stacked in the radial direction of the protective tube 1. This arrangement is suitable for encapsulated cables with special requirements. For example, a single protective tube 1 of the encapsulated cable is covered with a separate first encapsulation part 21. The first encapsulation body 34 is used to tear the first encapsulation part 21. Several other protective tubes 1 are then combined to cover another layer of the overall first encapsulation layer 2, namely the second encapsulation part 22. The second encapsulation body 35 is used to tear the outer overall second encapsulation part 22. In use, the second encapsulation body 35 can be stretched first to peel off the second encapsulation part 22, and then the first encapsulation body 34 can be stretched to peel off the first encapsulation part 21.

[0101] In some embodiments, the first encapsulation part 21 is made of a ceramic material that can form a heat-insulating ceramic glaze film on its surface when the operating temperature exceeds 350°C.

[0102] In this application, the first encapsulation part 21 uses a ceramic material with a specific formula. The protective function is achieved through the phase change of the material. The ceramic enamel film formation process does not affect the normal function of the cable. It is temperature sensitive and can automatically form a protective layer at high temperatures. The 350°C trigger point is suitable for oilfield operating environments. The ceramic enamel film has excellent heat insulation performance. The material has a self-protection function and does not require manual intervention.

[0103] Specifically, the composition of the first packaging section 21 is as follows: 25-30 parts of polyethylene, 60-70 parts of ethylene-vinyl acetate copolymer, 10-20 parts of EVM copolymer, 8-15 parts of calcium pyrophosphate, 1-5 parts of ultra-high molecular weight polysiloxane, 10-16 parts of mica, 5-8 parts of talc, 6-9 parts of spodumene, 10-12 parts of potassium feldspar, 10-18 parts of melamine cyanurate, 6-16 parts of azodicarbonamide, 4-6 parts of sodium peroxide, 2-4 parts of mineral oil, and 5-15 parts of vegetable oil. When the working temperature of the cable is between 350℃ and 2000℃, a hard ceramic enamel film will gradually form on the surface of the ceramicized material, with a bending strength of 0.3MPa to 9MPa. The mass retention of the hard ceramicized residue after combustion can reach 80% to 85%, and the dimensional change rate is 1% to 7%. It has the effects of fire resistance, fire blocking, heat insulation, heat preservation, and insulation, and can maintain normal operation for a certain period of time even under combustion conditions.

[0104] Specifically, the protective tube 1 can be a metal tube for conveying specific materials, or a cable 4 or a conveying tube can be installed inside the metal tube. In this case, the metal tube can provide additional mechanical protection and enhance electromagnetic shielding. The conveying tube is used to convey other materials.

[0105] In one exemplary embodiment, as shown in FIG17, a cable 4 is disposed inside the protective tube 1. The cable 4 includes a first conductor 41, a first insulating layer 42, and a first filling layer 43, which are arranged sequentially from the inside to the outside. The cable 4 is used to connect downhole instruments and equipment to transmit signals. In this embodiment, the first filling layer 43 is made of polypropylene (PP) material. The first insulating layer 42 is made of fluorinated ethylene propylene copolymer (FEP) material. The first filling layer 43 can provide insulation, flame retardancy, corrosion protection, and fixation protection for the covered material. The cable 4 is produced by a cable extrusion machine, which is a conventional technical means and will not be described in detail here.

[0106] As shown in Figures 19-23, this application embodiment provides a packaged cable, including: at least one cable body 100; a fireproof layer 200 disposed on the outer periphery of the at least one cable body 100; and a second packaging layer 300 disposed on the outer periphery of the fireproof layer 200.

[0107] In this application, the encapsulated cable adopts a three-layer structure design: cable body 100, fireproof layer 200, and second encapsulation layer 300. The fireproof layer 200 completely encapsulates the cable body 100, providing all-around protection. The second encapsulation layer 300 protects the fireproof layer 200, improving overall durability. By setting the fireproof layer 200 between the second encapsulation layer 300 and the cable body 100, the fireproof layer 200 improves the overall fire resistance of the encapsulated cable. In the event of a fire, it can still maintain normal operation for a certain period of time, allowing personnel time to take emergency measures, thereby reducing or avoiding losses caused by fire.

[0108] Specifically, the cable body 100 includes various types of cables 110, optical fibers 120, or transmission pipes 130.

[0109] In related technologies, encapsulated cables combine a cable 110, an optical fiber 120, and a transmission tube 130 into a single unit. Currently, this is achieved by simply using a second encapsulation layer 300 to fix the cable 110, optical fiber 120, and transmission tube 130 together. While some cables 110 have a fire-resistant layer 200, providing some fire resistance, the second encapsulation layer 300, made of thermoplastic material, is directly applied to the outside of the optical fiber 120 and transmission tube 130. This second encapsulation layer 300 primarily serves to fix the cable 110, optical fiber 120, and transmission tube 130, and provides some resistance to corrosion, wear, and impact. However, in the event of a fire, the second encapsulation layer 300 is quickly destroyed, causing the optical fiber 120 and transmission tube 130 to lose their normal operating capabilities. This prevents workers from taking timely action before the optical fiber and transmission tube 130 are damaged, resulting in losses. Furthermore, current encapsulated cables are also susceptible to damage to the second encapsulation layer 300 under high-temperature environments, further affecting the normal operating capabilities of the internal optical fiber 120 and transmission tube 130, making them unsuitable for long-term use in high-temperature environments.

[0110] In this embodiment, by providing a fireproof layer 200 inside the second encapsulation layer 300, the fireproof layer 200 completely surrounds the cable body 100, effectively protecting the light source and the transmission pipe 130, and improving the overall high-temperature resistance and fire resistance of the encapsulated cable. This not only allows for long-term use in high-temperature environments, but also effectively protects the internal cable body in the event of a fire, effectively responding to emergency fire situations, extending the time before the cable body is damaged, and thus providing workers with more time to take remedial measures, reducing or even preventing losses caused by fire.

[0111] The second encapsulation layer 300 adopts a fluoroplastic structure, giving the cable corrosion resistance, high temperature resistance, wear resistance, and tensile strength. The second encapsulation layer 300 adopts a layered structure, with the outer layer thickness set at 1.0mm to 1.4mm and the inner layer thickness at 0.6mm to 1.3mm, reducing the risk of cracking under the action of plastic internal stress and improving the protection function of the internal cable.

[0112] In some embodiments, the fireproof layer 200 is made of a ceramic material that can form a heat-insulating ceramic glaze film on its surface when the operating temperature exceeds 350°C.

[0113] In this application, the fireproof layer 200 uses a ceramicized material with a specific formula. The protective function is achieved through the phase change of the material. The ceramic enamel film formation process does not affect the normal function of the pipeline. It is temperature sensitive and can automatically form a protective layer at high temperatures. The 350℃ trigger point is suitable for oilfield operating environments. The ceramic enamel film has excellent heat insulation performance. The material has a self-protection function and does not require manual intervention.

[0114] Specifically, the composition of fireproof layer 200 is as follows: 25-30 parts polyethylene, 60-70 parts ethylene-vinyl acetate copolymer, 10-20 parts EVM copolymer, 8-15 parts calcium pyrophosphate, 1-5 parts ultra-high molecular weight polysiloxane, 10-16 parts mica, 5-8 parts talc, 6-9 parts spodumene, 10-12 parts potassium feldspar, 10-18 parts melamine cyanurate, 6-16 parts azodicarbonamide, 4-6 parts sodium peroxide, 2-4 parts mineral oil, and 5-15 parts vegetable oil. When the working temperature of the cable is between 350℃ and 2000℃, a hard ceramic enamel film will gradually form on the surface of the ceramicized material, with a bending strength of 0.3MPa to 9MPa. The mass retention of the hard ceramicized residue after combustion can reach 80% to 85%, and the dimensional change rate is 1% to 7%. It has the effects of fire resistance, fire blocking, heat insulation, heat preservation, and insulation, and can maintain normal operation for a certain period of time even under combustion conditions.

[0115] In some embodiments, the thickness of the fireproof layer 200 is 0.6mm-1.4mm.

[0116] In this application, the uniformity of the 200mm fireproof layer thickness is ensured through precise control of the coating process, taking into account the tolerance requirements in practical applications. The 200mm fireproof layer thickness has been optimized to guarantee the protective effect, control the overall weight and flexibility, use a moderate amount of material, keep costs under control, and facilitate engineering implementation and installation.

[0117] In some embodiments, a second reinforcing rib 400 is provided inside the fireproof layer 200 along the extension direction of the encapsulated cable.

[0118] In this application, the second reinforcing rib 400 is embedded inside the fireproof layer 200, extending along the axial direction of the cable, and is made of metal wire, thread, or tape. This improves the mechanical strength and tensile properties of the cable, facilitates traction and laying during construction, prevents deformation or damage to the cable during use, and can serve as an identification mark for the structural location.

[0119] Alternatively, the second reinforcing rib 400 may also employ a woven mesh tensile structure or use composite material reinforcing fibers.

[0120] In some embodiments, an identification portion 310 is provided on the outer surface of the second encapsulation layer 300 adjacent to the second reinforcing rib 400.

[0121] In this application, the identification part 310 corresponds to the position of the second reinforcing rib 400 and forms an identifiable mark on the surface of the second encapsulation layer 300 to ensure the durability and clarity of the mark. This facilitates quick external positioning of the second reinforcing rib 400, aids in the installation and maintenance of cables, provides visual or tactile location identification, and reduces the possibility of construction errors.

[0122] Alternatively, the identification unit 310 may use raised identification marks, or other marking methods such as color strips.

[0123] In some embodiments, the identification portion 310 is a groove disposed on the outer surface of the second encapsulation layer 300, and the groove is disposed along the extension direction of the encapsulation cable.

[0124] In this application, the groove design is easy to identify and locate, does not affect the overall shape of the cable, has good durability, is easy to identify by touch, is suitable for dark operation, the groove corresponds precisely to the position of the second reinforcing rib 400, the groove depth is moderate and does not affect the strength, and it is set continuously along the axial direction for easy tracking.

[0125] Furthermore, by setting the identification part 310 as a groove that extends along the axis of the encapsulation cable, it is convenient to quickly locate the second reinforcing rib 400 at any position on the encapsulation cable. Then, by pulling the second reinforcing rib 400 in a radial direction away from the cable body, a crack can be made in the second encapsulation layer 300, making it convenient to remove the second encapsulation layer 300.

[0126] Specifically, the groove can be designed as a discontinuous groove or a continuous groove.

[0127] In some embodiments, the cross-section of the encapsulated cable is one of square, rectangular, circular, or a circle with multiple overlapping parts.

[0128] In this application, a suitable cross section is selected according to actual needs to ensure the structural integrity of each layer. Considering the feasibility of the production process, a variety of cross section shapes are provided to adapt to different installation space requirements, facilitate the parallel arrangement of multiple cables, and improve space utilization.

[0129] Preferably, the cross-section of the encapsulated cable adopts multiple overlapping circular parts to form a gourd shape, which can reduce its weight by 20%-25%, save costs, and reduce the frictional resistance encountered during construction, making construction and wiring more convenient.

[0130] Specifically, the cross-section of the encapsulated cable is a sectional plane along the radial direction of the encapsulated cable. The cross-sectional shape of the encapsulated cable can be set to square (as shown in Figure 22) or rectangular (as shown in Figures 20, 21, and 23) depending on the number of cable bodies inside the encapsulated cable. It can also be set to triangular (the central axes of the three cable bodies form an equilateral triangle), allowing the encapsulation layer to effectively wrap the cable bodies. Alternatively, the outer circumference of the encapsulated cable can be set to a smooth arc structure to form a gourd shape as shown in Figure 19.

[0131] Alternatively, the cross-section of the encapsulated cable can also be elliptical or a composite cross-section.

[0132] In some embodiments, the cable body 100 includes a metal tube; and / or the cable body 100 includes a metal tube 140, wherein at least one of a cable 110, an optical fiber 120, and a delivery tube 130 is disposed inside the metal tube.

[0133] In this application, any one type can be used alone or in combination with other types. It can be flexibly configured according to actual needs, providing a variety of function options and combinations to meet the usage requirements of different working conditions, realize multi-functional transmission of power, signals and materials, and improve system integration.

[0134] Specifically, the cable body can consist only of a metal tube 140 for conveying specific materials, or a cable 110, optical fiber 120, or conveying tube 130 can be installed inside the metal tube 140. In this case, the metal tube 140 can provide additional mechanical protection and enhance electromagnetic shielding. The conveying tube 130 is used to convey other materials.

[0135] In this application, the metal tube 140 completely covers the internal components, and appropriate materials and wall thickness are selected to ensure the insulation and protection of the internal components, provide additional mechanical protection, enhance the electromagnetic shielding effect, improve the overall strength and stability, and facilitate installation and fixing.

[0136] Specifically, the 140 metal tube can be a composite metal tube or a metal tube with a special cross-section.

[0137] Among them, the metal pipe 140 can be a bare pipe, or a non-metallic material of a different color can be extruded or sprayed on the outer layer of the bare pipe to increase the protection of the pipe in terms of corrosion resistance and wear resistance, and can also be used to distinguish different pipes.

[0138] Specifically, when the cable body 100 is a cable 110, a second filler layer 150 of non-metallic material can be filled between the metal tube 140 and the cable 110. The cable 110 includes a second insulation layer 111 and a second conductor 112. The second insulation layer 111 is a fluoroplastic insulation layer disposed within the second filler layer 150, which has high temperature resistance and corrosion resistance. The second conductor 112 is disposed within the second insulation layer 111. The second conductor 112 is a metal conductor or a plated metal conductor. The second conductor 112 can be a single-core structure or a multi-core structure.

[0139] In one specific embodiment, one of the following can be provided in each metal tube 140: cable 110, optical fiber 120 and transmission tube 130; or two or three of the following can be provided in each metal tube 140: cable 110, optical fiber 120 and transmission tube 130.

[0140] In some embodiments, an identification portion 320 is provided on the outer surface of the second encapsulation layer 300, and the identification portion 320 is disposed adjacent to the cable 110.

[0141] In this application, the marking part 320 corresponds to the position of the cable 110 and adopts a clear and durable marking method, which facilitates external identification and positioning, makes it easy to identify the position of the cable 110, improves installation and maintenance efficiency, reduces the risk of operational errors, and facilitates daily inspection and maintenance.

[0142] Specifically, the marking portion 320 in this application uses a distinctive color, has a width of 3mm-5mm, and a depth of 1.2mm-2.0mm, to prevent the marking portion 320 from becoming blurred or disappearing due to wear on the surface of the second encapsulation layer 300 later.

[0143] Alternatively, the marking section 320 may use color strip markings or raised or recessed markings.

[0144] The encapsulated cable improves the overall fire resistance of the encapsulated cable by setting a fireproof layer 200 between the second encapsulation layer 300 and the cable body 100. In the event of a fire, it can still maintain normal operation for a certain period of time, giving staff time to take emergency measures and thus reducing or avoiding losses caused by fire.

[0145] This utility model embodiment provides a detection encapsulation cable, as shown in Figures 24-27, which includes a conductive core 11, such as an oxygen-free copper conductive core, which can be a single-core structure or a stranded structure; a third insulation layer 10 on the outside of the conductive core 11, which can be a fluoroplastic insulation layer with high temperature resistance and corrosion resistance; and a protective tube 8 on the outside of the third insulation layer 10, which can be a metal protective tube, thus providing armoring and shielding functions. In addition, the protective tube 8 also has advantages such as high strength, high pressure resistance, and corrosion resistance.

[0146] Furthermore, a non-metallic filler layer 9 is provided between the third insulating layer 10 and the protective tube 8. The non-metallic filler layer 9 serves to protect the third insulating layer 10 and can also fill the space between the third insulating layer 10 and the protective tube 8, thereby providing a buffering effect.

[0147] Furthermore, a third encapsulation layer 6 is provided on the outer side of the protective tube 8, which is used to encapsulate the encapsulated cable. Considering that existing encapsulation layers all use a single-layer fluoroplastic structure, but which has high fluidity after melting, high hardness after cooling, and is prone to defects such as cracks when the thickness is too large, directly affecting the protective effect of the encapsulation layer, reducing the service life of the cable, or even causing equipment failure.

[0148] Therefore, the third encapsulation layer 6 has a double-layer structure made of non-metallic materials, and the double-layer structure can be fabricated using a 1+1 device during the processing of the third encapsulation layer 6.

[0149] The outer layer of the non-metallic double-layer structure is a thermoplastic material layer 61, and the inner layer is a ceramic layer 62. The thermoplastic material layer 61 is made of thermoplastic material, and can be made of thermoplastic plastics with different temperature resistance ratings depending on the application environment, thus making it suitable for different occasions.

[0150] The non-metallic double-layer structure of the third encapsulation layer 6 can reduce the stress generated by the high-temperature plastic during plasticizing and cooling, thereby reducing cracking defects, improving the protective performance of the third encapsulation layer 6, and extending the service life of the encapsulated cable.

[0151] Furthermore, the cross-section of the outer surface of the third encapsulation layer 6 can be circular or rectangular. When the cross-section of the outer surface of the third encapsulation layer 6 is circular, it is beneficial for the laying and movement of the encapsulation cable. When the cross-section of the outer surface of the third encapsulation layer 6 is rectangular, it is beneficial for the encapsulation cable to be gripped during movement and fixed on the ground.

[0152] Furthermore, a plurality of through grooves 5 are provided on the outer surface of the third encapsulation layer 6, particularly the thermoplastic material layer 61. These through grooves 5 extend along the length of the conductive core 11. The through grooves 5 effectively reduce the weight of the encapsulated cable while maintaining its performance, thereby saving costs. The through grooves 5 also facilitate secure gripping of the cable by cable propulsion equipment during manhole mounting and dismounting. Preferably, the cross-section of the through grooves 5 can be rectangular, but other suitable shapes are also possible.

[0153] Furthermore, the depth of the through groove 5 does not exceed 20%-35% of the thickness of the third encapsulation layer 6, so as to ensure that the thickness of the third encapsulation layer 6 can simultaneously meet the strength requirements.

[0154] The ceramic layer 62 is made of a ceramicized material, which allows the encapsulated cable to withstand high temperatures and prevent deformation. At least one tensile wire 7 is provided within the ceramic layer 62, extending along the length of the conductive core 11, for example, at crack-prone or weak points on the encapsulated cable. Considering that with the improvement of extraction technology, the extraction depth of oil and gas wells has increased from the initial 4000-8000 meters to over 12000 meters, the self-weight caused by the cable length places higher demands on the cable's tensile strength. The tensile wire 7 improves the tensile strength of the encapsulated cable. Preferably, the tensile wire 7 can be made of metal or other materials that meet the tensile strength requirements, and it also allows for direct tearing of the encapsulation.

[0155] In one embodiment, there are two tensile wires 7, which are symmetrically arranged relative to the conductive core 11. Of course, more tensile wires 7 can be provided to improve the tensile strength of the encapsulated cable.

[0156] The through groove 5 and the tensile wire 7 in the ceramic layer 62 are radially corresponding. By corresponding the through groove 5 and the tensile wire 7, the through groove 5 also has an marking function, which can mark the weak points on the outer surface of the third encapsulation layer 6, so as to facilitate the use of external tools to peel off the encapsulation with the tensile wire 7.

[0157] Furthermore, the number of the through slots 5 is even. Setting an even number of through slots 5 facilitates the arrangement of the through slots 5 opposite to each other on the outer surface of the thermoplastic material layer 61. The multiple through slots 5 are evenly arranged circumferentially on the outer surface of the thermoplastic material layer 61.

[0158] In one embodiment, two through slots 5 are provided on the outer surface of the thermoplastic material layer 61, and the two through slots 5 are disposed opposite to the conductive wire core 11 on the outer surface of the thermoplastic material layer 61. In another embodiment, four through slots 5 may be provided on the thermoplastic material layer 61, and seven through slots 5 may be evenly disposed on the outer surface of the thermoplastic material layer 61. For example, when the cross-section of the outer surface of the thermoplastic material layer 61 is circular, the four through slots 5 are disposed at 90° intervals on the arc of the outer surface of the thermoplastic material layer 61; when the cross-section of the outer surface of the thermoplastic material layer 61 is rectangular, especially square, the four through slots 5 are respectively disposed on the four sides of the outer surface of the thermoplastic material layer 61.

[0159] Furthermore, when the cross-section of the outer surface of the thermoplastic material layer 61 is circular, the arc width of the through groove 5 is 10%-15% of the circumference of the outer surface of the thermoplastic material layer 61.

[0160] Furthermore, the protruding corner of the through groove 5 adopts a rounded chamfer structure, and the chamfer radius is preferably 2mm-3mm. By setting the rounded chamfer structure, it is beneficial to increase the friction during construction and also avoid the safety risk of injury to the hand during operation.

[0161] This utility model embodiment can not only clearly identify the weak points on the logging cable, but also solve the problem of easy cracking of the encapsulation material, thereby improving the tensile strength, compressive strength, corrosion resistance, fire resistance and cable life performance of the logging cable.

[0162] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0163] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. A type of encapsulated cable, characterized in that, include: Protective tube; The first encapsulation layer is sleeved on the outer periphery of the protective tube; A packaging strip is embedded in the first packaging layer. The packaging strip includes a first side and a second side disposed opposite to each other. The first side of the packaging strip is at least partially attached to the outer surface of the protective tube, or the first side of the packaging strip has at least a gap with the outer surface of the protective tube. The second side of the packaging strip is flush with the outer side of the first packaging layer, or the second side of the packaging strip protrudes from the outer side of the first packaging layer.

2. The encapsulated cable according to claim 1, characterized in that, The first encapsulation layer extends along the axial direction of the protective tube, and the first encapsulation layer has a first end and a second end disposed opposite to each other. The encapsulation strip extends from the first end of the first encapsulation layer to the second end of the first encapsulation layer.

3. The encapsulated cable according to claim 2, characterized in that, The length direction of the sealing strip is parallel to the axial direction of the protective tube.

4. The encapsulated cable according to claim 2, characterized in that, The encapsulation strip is arranged in a spiral around the axis of the protective tube.

5. The encapsulated cable according to claim 1, characterized in that, The sealing strip is provided with reinforcing ribs.

6. The encapsulated cable according to claim 2, characterized in that, The encapsulation strips are provided in multiple ways. When the cross-section of the outer side of the first encapsulation layer is set as a polygon, at least two of the encapsulation strips are respectively provided on adjacent sides of the first encapsulation layer. And / or, At least two of the encapsulation strips are respectively disposed on opposite sides of the first encapsulation layer.

7. The encapsulated cable according to claim 2, characterized in that, The first encapsulation layer includes a first encapsulation part and a second encapsulation part, wherein the first encapsulation part is sleeved on the outer peripheral side of the protective tube, and the second encapsulation part is sleeved on the outer peripheral side of the first encapsulation part; The encapsulation strip includes a first encapsulation body and a second encapsulation body. The first encapsulation body is embedded in the first encapsulation part, and the second encapsulation body is embedded in the second encapsulation part. The first encapsulation body and the second encapsulation body are stacked in the radial direction of the protective tube.

8. The encapsulated cable according to claim 2, characterized in that, The encapsulation strip has a protrusion that protrudes from the first end or the second end of the first encapsulation layer.

9. The encapsulated cable according to claim 1, characterized in that, Multiple protective tubes are provided, and the multiple protective tubes are spaced apart along the width direction of the first encapsulation layer. Multiple encapsulation strips are provided, and each of the multiple encapsulation strips corresponds to one of the protective tubes.

10. The encapsulated cable according to claim 9, characterized in that, The multiple encapsulation strips are configured with different colors according to the different functions of the protective tube.

11. A type of encapsulated cable, characterized in that, include: Protective tube; The first encapsulation layer is sleeved on the outer periphery of the protective tube; A sealing strip is embedded in the first sealing layer, at least a portion of which has a gap with the outer surface of the protective tube, and the sealing strip has a gap with the outer side of the first sealing layer.

12. The encapsulated cable according to claim 11, characterized in that, The first encapsulation layer extends along the axial direction of the protective tube, and the first encapsulation layer has a first end and a second end disposed opposite to each other. The encapsulation strip extends from the first end of the first encapsulation layer to the second end of the first encapsulation layer.

13. The encapsulated cable according to claim 11, characterized in that, The sealing strip is provided with reinforcing ribs.

14. The encapsulated cable according to claim 12, characterized in that, The encapsulation strips are provided in multiple ways. When the cross-section of the outer side of the first encapsulation layer is set as a polygon, at least two of the encapsulation strips are respectively provided on adjacent sides of the first encapsulation layer. And / or, At least two of the encapsulation strips are respectively disposed on opposite sides of the first encapsulation layer.

15. The encapsulated cable according to claim 12, characterized in that, The first encapsulation layer includes a first encapsulation part and a second encapsulation part, wherein the first encapsulation part is sleeved on the outer peripheral side of the protective tube, and the second encapsulation part is sleeved on the outer peripheral side of the first encapsulation part; The encapsulation strip includes a first encapsulation body and a second encapsulation body. The first encapsulation body is embedded in the first encapsulation part, and the second encapsulation body is embedded in the second encapsulation part. The first encapsulation body and the second encapsulation body are stacked in the radial direction of the protective tube.

16. The encapsulated cable according to claim 15, characterized in that, The first encapsulation part is made of a ceramic material that can form a heat-insulating ceramic glaze film on its surface when the operating temperature exceeds 350°C.

17. The encapsulated cable according to claim 12, characterized in that, The encapsulation strip is provided with a protrusion, which protrudes from the first end of the first encapsulation layer; and / or The protrusion protrudes from the second end of the first encapsulation layer.

18. The encapsulated cable according to claim 11, characterized in that, Multiple protective tubes are provided, and the multiple protective tubes are spaced apart along the width direction of the first encapsulation layer. Multiple encapsulation strips are provided, and the multiple encapsulation strips correspond one-to-one with the multiple protective tubes.

19. The encapsulated cable according to claim 18, characterized in that, The central axes of the plurality of the encapsulation strips are equidistant from the outer side of the first encapsulation layer; or, the central axes of at least two of the encapsulation strips are not equidistant from the outer side of the first encapsulation layer.

20. The encapsulated cable according to claim 18, characterized in that, The multiple encapsulation strips are configured with different colors according to the different functions of the protective tube.

21. A type of encapsulated cable, characterized in that, include: At least one cable body; A fireproof layer is provided on the outer periphery of the at least one cable body; as well as The second encapsulation layer is disposed on the outer periphery of the fireproof layer.

22. The encapsulated cable according to claim 21, characterized in that, The fireproof layer is made of a ceramic material that can form a heat-insulating ceramic glaze film on its surface when the working temperature exceeds 350℃.

23. The encapsulated cable according to claim 21 or 22, characterized in that, The thickness of the fireproof layer is 0.6mm-1.4mm.

24. The encapsulated cable according to claim 21, characterized in that, The fireproof layer is provided with reinforcing ribs along the extension direction of the encapsulated cable.

25. The encapsulated cable according to claim 24, characterized in that, An identification portion is provided on the outer surface of the second encapsulation layer adjacent to the reinforcing rib.

26. The encapsulated cable according to claim 25, characterized in that, The identification part is a groove disposed on the outer surface of the second encapsulation layer, and the groove is disposed along the extension direction of the encapsulation cable.

27. The encapsulated cable according to claim 21, characterized in that, The cross-section of the encapsulated cable is one of square, rectangular, circular, or a circle with multiple overlapping parts.

28. The encapsulated cable according to claim 21, characterized in that, The cable body includes a metal tube; and / or The cable body includes a metal tube, and at least one of a cable, an optical fiber, and a transmission tube is disposed inside the metal tube.

29. The encapsulated cable according to claim 28, characterized in that, The cable body includes a cable, the cable includes a second insulation layer and a second conductor disposed within the second insulation layer, the second insulation layer is made of fluoroplastic material, and the cable body also includes a second filler layer disposed between the second insulation layer and the metal tube.

30. The encapsulated cable according to claim 28, characterized in that, The outer surface of the second encapsulation layer is provided with an identification portion, which is disposed adjacent to the cable.

31. A detection encapsulation cable, characterized in that, It includes a conductive wire core, and from the inside to the outside of the conductive wire core, a third insulation layer, a protective tube and a third encapsulation layer are arranged in sequence. Multiple through slots are arranged on the outer surface of the third encapsulation layer, and the through slots extend along the length direction of the conductive wire core.

32. The detection encapsulation cable according to claim 31, characterized in that, The third encapsulation layer has a non-metallic double-layer structure.

33. The detection encapsulation cable according to claim 31, characterized in that, The outer layer of the non-metallic double-layer structure is a thermoplastic material layer, and the inner layer is a ceramic layer.

34. The detection encapsulation cable according to claim 31, characterized in that, The number of through slots is even, and multiple through slots are evenly arranged on the outer surface of the third encapsulation layer.

35. The detection encapsulation cable according to claim 34, characterized in that, At least one tensile wire is provided within the ceramic layer, and the tensile wire extends along the length direction of the conductive core.

36. The detection encapsulation cable according to claim 35, characterized in that, The tensile wire and the through groove are arranged radially in correspondence.

37. The detection encapsulation cable according to claim 31, characterized in that, The cross-section of the outer surface of the third encapsulation layer is circular or rectangular.

38. The detection encapsulation cable according to claim 31, characterized in that, When the cross-section of the outer surface of the third encapsulation layer is circular, the arc width of the through slot is 10%-15% of the circumference of the outer surface of the third encapsulation layer.

39. The detection encapsulation cable according to claim 31, characterized in that, The depth of the channel does not exceed 20%-35% of the thickness of the third encapsulation layer.

40. The detection encapsulation cable according to claim 31, characterized in that, A non-metallic filler layer is provided between the third insulating layer and the protective tube.

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