Packaging pipe cable for detection

Abstract

The utility model provides a packaging tube cable for detection, which comprises a conductive wire core, the outer side of the conductive wire core is sequentially provided with an insulating layer, a protective tube and a packaging layer from inside to outside, the outer surface of the packaging layer is provided with a plurality of through grooves, and the through grooves extend along the length direction of the conductive wire core. According to the embodiment of the utility model, the position of a weak point on the logging cable can be clearly identified, and the problem that a packaging material is easy to crack can be solved, so that the tensile strength, the compression resistance, the corrosion resistance and the fireproof performance of the logging cable are improved, and the service life of the cable is prolonged.

Description

Technical Field

[0001] This utility model relates to the technical field of tubing and cables, and more specifically, to a packaged tubing and cable for detection. Background Technology

[0002] Detection cables can be used for various geological explorations, water conservancy and hydrological surveys, geothermal logging, logging, completion, perforation, coring and other work of various oil and gas wells. They are the carriers for transmitting power, signals and other data between the surface part of the mining system and underground instruments.

[0003] Modern oilfield exploration and extraction operations operate in harsh environments, often involving high temperatures, high pressures, and corrosive gases such as oil and gas. The encapsulation layer is designed to protect internal cables and pipelines, increasing corrosion and wear resistance and extending service life. However, during use, cracks frequently appear in the encapsulation layer; and in the event of a fire or excessively high temperatures, cables can be damaged. Solving these problems to make exploration and extraction activities more efficient and safer is a challenge faced by both customers and manufacturers. Utility Model Content

[0004] In view of this, the present invention aims to provide a detection encapsulation cable to solve the above-mentioned technical problems in the prior art.

[0005] This utility model provides a detection encapsulation cable, which includes a conductive core. An insulation layer, a protective tube, and an encapsulation layer are sequentially arranged on the outer side of the conductive core from the inside to the outside. A plurality of through slots are provided on the outer surface of the encapsulation layer, and the through slots extend along the length direction of the conductive core.

[0006] In some embodiments, the encapsulation layer has a non-metallic double-layer structure.

[0007] In some embodiments, the outer layer of the non-metallic double-layer structure is a thermoplastic material layer, and the inner layer is a ceramic layer.

[0008] In some embodiments, the number of through slots is even, and a plurality of through slots are uniformly arranged on the outer surface of the encapsulation layer.

[0009] In some embodiments, at least one tensile filament is provided within the ceramic layer, and the tensile filament extends along the length direction of the conductive core.

[0010] In some embodiments, the tensile wire and the through groove are arranged radially in correspondence.

[0011] In some embodiments, the cross-section of the outer surface of the encapsulation layer is circular or rectangular.

[0012] In some embodiments, when the cross-section of the outer surface of the encapsulation layer is circular, the arc width of the through slot is 10%-15% of the circumference of the outer surface of the encapsulation layer.

[0013] In some embodiments, the depth of the through-slot does not exceed 20%-35% of the thickness of the encapsulation layer.

[0014] In some embodiments, a non-metallic filler layer is provided between the insulating layer and the protective tube.

[0015] 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.

[0016] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description

[0017] In drawings that are not necessarily drawn to scale, the same reference numerals may describe similar parts in different views. The same reference numerals with or without letter suffixes may indicate different instances of similar parts. The drawings generally illustrate various embodiments by way of example rather than limitation and, together with the description and claims, serve to illustrate the disclosed embodiments. Where appropriate, the same reference numerals are used in all drawings to refer to the same or similar parts. Such embodiments are illustrative and not intended to be exhaustive or exclusive embodiments of the apparatus or method. The accompanying drawings, which are provided to further understand the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with their description, serve to explain the present invention and do not constitute an undue limitation of the present invention. In the drawings:

[0018] Figure 1 This is a cross-sectional view of the encapsulated cable in one embodiment of the present utility model;

[0019] Figure 2 This is a second cross-sectional view of the encapsulated cable in one embodiment of the present invention;

[0020] Figure 3 This is a cross-sectional view of the encapsulated cable in another embodiment of the present invention;

[0021] Figure 4 This is a cross-sectional view of the encapsulated cable in another embodiment of the present invention.

[0022] Figure label:

[0023] 1-Groove; 2-Encapsulation layer; 21-Thermoplastic material layer; 22-Ceramic layer; 4-Tension-resistant wire; 5-Sheath; 6-Non-metallic filler layer; 7-Insulation layer; 8-Conductive wire core. Detailed Implementation

[0024] The specific embodiments of the present invention will now be described in detail with reference to the accompanying drawings, but these are not intended to limit the scope of the present invention.

[0025] It should be understood that various modifications can be made to the embodiments disclosed herein. Therefore, the above description should not be considered as limiting, but merely as an example of embodiments. Other modifications within the scope and spirit of this invention will be apparent to those skilled in the art.

[0026] The accompanying drawings, which are included in and form part of this specification, illustrate embodiments of the present invention and, together with the general description of the present invention given above and the detailed description of the embodiments given below, serve to explain the principles of the present invention.

[0027] These and other features of the present invention will become apparent from the following description of preferred forms of embodiments given as non-limiting examples, with reference to the accompanying drawings.

[0028] It should also be understood that although the present invention has been described with reference to some specific examples, those skilled in the art can certainly implement many other equivalent forms of the present invention, which have the features described in the claims and are therefore all within the scope of protection defined herein.

[0029] The above and other aspects, features and advantages of the present invention will become more apparent when taken in conjunction with the accompanying drawings and in view of the following detailed description.

[0030] Specific embodiments of the present invention will now be described with reference to the accompanying drawings; however, it should be understood that the disclosed embodiments are merely examples of the present invention, which may be implemented in various ways. Well-known and / or repeated functions and structures are not described in detail to avoid unnecessary or redundant details that could obscure the present invention. Therefore, the specific structural and functional details disclosed herein are not intended to be limiting, but merely to serve as the basis and representative basis for the claims to teach those skilled in the art to use the present invention in a variety of substantially any suitable detailed structures.

[0031] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the utility model described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0032] This specification may use the phrases “in one embodiment,” “in another embodiment,” “in yet another embodiment,” or “in other embodiments,” all of which may refer to one or more of the same or different embodiments according to the present invention.

[0033] This utility model embodiment provides a detection encapsulated cable, such as Figures 1-4 As shown, it includes a conductive core 8, which may be, for example, an oxygen-free copper conductive core. The conductive core 8 may be a single-core structure or a stranded structure. An insulation layer 7 is provided on the outside of the conductive core 8. The insulation layer 7 may be a fluoroplastic insulation layer with high temperature resistance and corrosion resistance. A protective tube 5 is sleeved on the outside of the insulation layer 7. The protective tube 5 may be a metal protective tube, thus providing armor and shielding functions. In addition, the protective tube 5 also has advantages such as high strength, high pressure resistance, and corrosion resistance.

[0034] Furthermore, a non-metallic filler layer 6 is provided between the insulating layer 7 and the protective tube 5. The non-metallic filler layer 6 is used to protect the insulating layer 7 and can also fill the space between the insulating layer 7 and the protective tube 5, thereby having a buffering effect.

[0035] Furthermore, an encapsulation layer 2 is provided on the outer side of the protective tube 5, which is used to encapsulate the encapsulated cable. Considering that existing encapsulation layers all use a single-layer fluoroplastic structure, but it has high fluidity after melting, high hardness after cooling, and is prone to defects such as cracks when the thickness is too large, it directly affects the protective effect of the encapsulation layer, reduces the service life of the cable, and may even cause equipment failure.

[0036] Therefore, the package 2 has a double-layer structure made of non-metallic material, and the double-layer structure can be fabricated using a 1+1 device during the processing of the package layer 2.

[0037] The outer layer of the non-metallic double-layer structure is a thermoplastic material layer 21, and the inner layer is a ceramic layer 22. The thermoplastic material layer 21 is made of thermoplastic material, and can be made of thermoplastic plastics with different temperature resistance grades according to different usage environments, so as to be suitable for different occasions.

[0038] The non-metallic double-layer structure of the encapsulation layer 2 can reduce the stress generated by the high-temperature plastic during plasticizing and cooling, thereby reducing cracking defects, improving the protective performance of the encapsulation layer 2, and extending the service life of the encapsulated cable.

[0039] Furthermore, the cross-section of the outer surface of the encapsulation layer 2 can be circular or rectangular. When the cross-section of the outer surface of the encapsulation layer 2 is circular, it is beneficial for the laying and movement of the encapsulation cable. When the cross-section of the outer surface of the encapsulation layer 2 is rectangular, it is beneficial for the encapsulation cable to be gripped during movement and fixed on the ground.

[0040] Furthermore, a plurality of through grooves 1 are provided on the outer surface of the encapsulation layer 2, particularly the thermoplastic material layer 21. These through grooves 1 extend along the length of the conductive core 9. The through grooves 1 effectively reduce the weight of the encapsulated cable while maintaining its performance, thereby saving costs. The through grooves 1 also facilitate secure gripping of the cable by cable propulsion equipment during loading and unloading. Preferably, the cross-section of the through groove 1 can be rectangular, but other suitable shapes are also possible.

[0041] Furthermore, the depth of the through groove 1 does not exceed 20%-35% of the thickness of the encapsulation layer 2, so as to ensure that the thickness of the encapsulation layer 2 can simultaneously meet the strength requirements.

[0042] The ceramic layer 22 is made of a ceramicized material, which allows the encapsulated cable to withstand high temperatures and prevent deformation. At least one tensile wire 4 is provided within the ceramic layer 22, extending along the length of the conductive core 8, for example, specifically 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 4 improves the tensile strength of the encapsulated cable. Preferably, the tensile wire 4 can be made of metal or other materials that meet the tensile strength requirements, and it also allows for direct tearing of the encapsulation.

[0043] In one embodiment, there are two tensile wires 4, which are symmetrically arranged relative to the conductive core 8. Of course, more tensile wires 4 can be provided to improve the tensile strength of the encapsulated cable.

[0044] The through groove 1 is radially corresponding to the tensile filament 4 in the ceramic layer 22. By corresponding the through groove 1 to the tensile filament 4, the through groove 1 also has an marking function, which can mark the weak points on the outer surface of the encapsulation layer 2, making it convenient to use external tools in conjunction with the tensile filament 4 to peel off the encapsulation.

[0045] Furthermore, the number of the through slots 1 is even. Setting an even number of through slots 1 facilitates the arrangement of the through slots 1 opposite to each other on the outer surface of the thermoplastic material layer 21. The multiple through slots 1 are evenly arranged circumferentially on the outer surface of the thermoplastic material layer 21.

[0046] In one embodiment, two through slots 1 are provided on the outer surface of the thermoplastic material layer 21, and the two through slots 1 are disposed opposite to the conductive wire core 8 on the outer surface of the thermoplastic material layer 21. In another embodiment, four through slots 1 may be provided on the thermoplastic material layer 21, and the four through slots 1 are evenly disposed on the outer surface of the thermoplastic material layer 21. For example, when the cross-section of the outer surface of the thermoplastic material layer 21 is circular, the four through slots 1 are disposed at 90° intervals on the arc of the outer surface of the thermoplastic material layer 21; when the cross-section of the outer surface of the thermoplastic material layer 21 is rectangular, especially square, the four through slots 1 are respectively disposed on the four sides of the outer surface of the thermoplastic material layer 21.

[0047] Furthermore, when the cross-section of the outer surface of the thermoplastic material layer 21 is circular, the arc width of the through groove 1 is 10%-15% of the circumference of the outer surface of the thermoplastic material layer 21.

[0048] Furthermore, the protruding corner of the through groove 1 adopts a rounded chamfer structure, and the chamfer radius is preferably 2-3mm. 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.

[0049] 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.

[0050] Furthermore, the features of the embodiments shown in the accompanying drawings or the various embodiments mentioned in this specification should not be construed as independent embodiments. Rather, each feature described in one example of an embodiment can be combined with one or more other desired features from other embodiments to produce other embodiments not described in words or with reference to the accompanying drawings.

[0051] The above-described embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

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

2. The detection encapsulation cable according to claim 1, characterized in that, The encapsulation layer has a non-metallic double-layer structure.

3. The detection encapsulation cable according to claim 2, 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.

4. The detection encapsulation cable according to claim 3, 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.

5. The detection encapsulation cable according to claim 4, characterized in that, The tensile wire and the through groove are arranged radially in correspondence.

6. The detection encapsulation cable according to claim 1, characterized in that, The number of through slots is even, and multiple through slots are evenly arranged on the outer surface of the encapsulation layer.

7. The detection encapsulation cable according to claim 1, characterized in that, The outer surface of the encapsulation layer has a circular or rectangular cross-section.

8. The detection encapsulation cable according to claim 1, characterized in that, When the cross-section of the outer surface of the encapsulation layer is circular, the arc width of the through groove is 10%-15% of the circumference of the outer surface of the encapsulation layer.

9. The detection encapsulation cable according to claim 1, characterized in that, The depth of the through groove does not exceed 20%-35% of the thickness of the encapsulation layer.

10. The detection encapsulation cable according to claim 1, characterized in that, A non-metallic filler layer is provided between the insulation layer and the protective tube.

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