A video data acquisition logging cable

Abstract

This invention relates to a video data acquisition logging cable. The video data acquisition logging cable includes an outer sheath, multiple conductors wound around the inside of the outer sheath, and a filler material filling the gaps between the outer sheath and the conductors. Each conductor includes a hollow flexible tube, the hollow portion of which is filled with a first filler material. Multiple wire cores are arranged around the outer wall of the hollow flexible tube, and each wire core is wound around the outer wall of the hollow flexible tube. Two adjacent wire cores wound around the outer wall of each hollow flexible tube are spaced far apart. An outer sheath is also fitted over the hollow flexible tube, and the outer sheath wraps around the corresponding multiple wire cores on the hollow flexible tube. An elastic element is located inside the outer sheath and elastically connected to the inner wall of the outer sheath. An armor layer is fitted over the outer sheath. A sheath is also included. The video data acquisition logging cable provided by this invention has the advantages of high tensile strength, ensuring normal signal transmission, and long service life.

Description

Technical Field

[0001] This invention belongs to the field of logging cable technology, specifically relating to a video data acquisition logging cable. Background Technology

[0002] Logging cables are used for logging, perforation, and coring operations in various oil and gas wells. They can also be used in hydraulic and hydrological surveying, coalfield geological exploration, and geothermal logging. They serve as a connection between surface systems and underground instruments, acting as a load-bearing link and transmitting measurement data. During downhole operations, video data acquisition equipment is typically used to observe the downhole environment and record data. Logging cables are used for data transmission between the downhole system and the surface.

[0003] During the process of recording downhole environmental data using video data acquisition equipment, cable pulling may occur due to the complex environment downhole. Since the signal transmission core inside a cable is generally a straight line, when the cable is subjected to forward tension, the internal core will also be subjected to a certain tension, causing the cable to deform. When the core is subjected to a large rigid tension, it is easy to crack or even break, affecting its signal transmission. Summary of the Invention

[0004] To address the aforementioned problems in the existing technology, this invention provides a video data acquisition logging cable with high tensile strength, ensuring normal signal transmission, and long service life. The technical problem to be solved by this invention is achieved through the following technical solution:

[0005] The video data acquisition logging cable provided by this invention includes: an outer sheath, multiple conductors arranged around the inner side of the outer sheath, and a filler filling the gap between the outer sheath and the multiple conductors; each conductor includes a hollow flexible tube, the hollow part of which is filled with a first filler, and multiple wire cores arranged around the outer wall of the hollow flexible tube, with each wire core wound around the outer wall of the hollow flexible tube, and two adjacent wire cores wound around the outer wall of each hollow flexible tube being spaced apart from each other; an outer sheath is also fitted onto the hollow flexible tube, and the outer sheath wraps around the multiple wire cores on the corresponding hollow flexible tube; an elastic element located inside the outer sheath and elastically connected to the inner wall of the outer sheath; an armor layer fitted onto the outer sheath; and a sheath fitted onto the armor layer.

[0006] Preferably, the outer sheath includes an anti-corrosion layer, an insulation layer, and a magnetic shielding layer, and the anti-corrosion layer, insulation layer, and magnetic shielding layer are arranged sequentially from the outside to the inside, and the filler fills the gap between the magnetic shielding layer and the multiple conductors.

[0007] Preferably, the anti-corrosion layer uses a mixture of nano-carbon black and bimodal polyethylene as the anti-corrosion material, the insulation layer uses silicone rubber as the insulation material, and the magnetic insulation layer uses a mixture of silicon nitride ceramic powder as the magnetic insulation material.

[0008] Preferably, the elastic element includes an elastic tube located inside the magnetically insulating layer. The elastic tube is centrally located and filled with a second filler. Multiple sets of vertically arranged arc-shaped elastic rods are installed on the outer wall of the elastic tube, and multiple arc-shaped elastic rods in each set of arc-shaped elastic rods surround the elastic tube.

[0009] Preferably, multiple conductors and multiple arc-shaped elastic rods are arranged alternately, and the side of the arc-shaped elastic rod away from the elastic tube is arranged to abut against the magnetic insulation layer.

[0010] Preferably, the armor layer is formed by multiple steel wires wrapped together to form an anti-corrosion layer.

[0011] Preferably, the sheath includes an anti-wear tube, which is sleeved outside the armor layer, and an external leakage strip is provided on the outer side wall of the anti-wear tube, with multiple external leakage strips arranged around the outside of the armor layer.

[0012] Preferably, the abrasion-resistant tube is bonded to the armor layer with adhesive.

[0013] Preferably, the filler, the first filler and the second filler are both elastic plastics.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0015] 1. The conductor in this invention consists of a hollow flexible tube, a first filler, wire cores, and an outer tube. Multiple wire cores are arranged and wound around the hollow flexible tube with a certain gap between them. When the cable is pulled, the wire cores will stretch and squeeze the hollow flexible tube. The wire cores will not be directly subjected to rigid tension and will not be damaged or even broken, thus ensuring normal signal transmission of the wire cores in the cable. The first filler inside the hollow flexible tube has a certain elasticity, which will allow the wire cores to return to their initial state when there is no tension.

[0016] 2. The outer sheath in this invention consists of an anti-corrosion layer, an insulation layer, and a magnetic shielding layer, which has good anti-corrosion, insulation, and magnetic shielding properties, giving the cable strong corrosion resistance, insulation, and electromagnetic interference protection functions, and preventing the cable from being affected by external electromagnetic interference and thus its signal transmission.

[0017] 3. This invention incorporates an elastic element within the outer sheath. This elastic element, composed of an elastic tube, a second filler, and an arc-shaped elastic rod, possesses excellent elastic recovery force. Installed inside the outer sheath, the elastic element, along with the conductor and filler, supports the outer sheath. When the cable is compressed, it compresses the arc-shaped elastic rod outside the elastic tube, further compressing the elastic tube and mitigating the sudden impact force on the cable, thus protecting it. After the cable is no longer compressed, it, in conjunction with the filler and other components, enhances the cable's recovery.

[0018] 4. This invention features an armor layer on the outside of the outer sheath. Multiple steel wires, arranged in a spring-like shape and tightly fitted together, are sleeved on the anti-corrosion layer to form the external armor of the cable, enhancing its tensile strength. A sheath is also installed on the armor layer to protect the armor and improve the safety of the cable. When the cable is dragged on the ground, the anti-wear tube does not directly contact the ground; instead, the outer exposed strip contacts the ground, protecting the anti-wear tube and extending the service life of the sheath. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a preferred embodiment of the video data acquisition logging cable provided by the present invention;

[0020] Figure 2 This is a schematic diagram of the outer cladding layer in this invention;

[0021] Figure 3 This is a schematic diagram of the structure in this invention where the conductors are distributed around the elastic element;

[0022] Figure 4 This is a schematic diagram of the conductor structure in this invention;

[0023] Figure 5 This is a schematic diagram of the structure in this invention where the wire cores are distributed around the hollow tube;

[0024] Figure 6 This is a schematic diagram of the elastic element in this invention;

[0025] Figure 7 This is a schematic diagram of the sheath structure in this invention.

[0026] The following are the labeling elements in the diagram: 1. Outer sheath; 11. Anti-corrosion layer; 12. Insulation layer; 13. Non-magnetic layer; 2. Conductor; 21. Hollow flexible tube; 22. First filler; 23. Core wire; 24. Outer sheath; 3. Elastic element; 31. Elastic tube; 32. Second filler; 33. Arc-shaped elastic rod; 4. Armor layer; 5. Sheath; 51. Anti-wear tube; 52. External strip. Detailed Implementation

[0027] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto.

[0028] Example 1

[0029] Please see Figures 1 to 7The system comprises: an outer sheath 1, a plurality of conductors 2 arranged around the inner side of the outer sheath 1, and a filler material filling the gap between the outer sheath 1 and the plurality of conductors 2; a hollow flexible tube 21, the hollow part of the hollow flexible tube 21 being filled with a first filler 22, and a plurality of wire cores 23 arranged around the outer wall of the hollow flexible tube 21, with each of the plurality of wire cores 23 wound around the outer wall of the hollow flexible tube 21, and the two adjacent wire cores 23 wound around the outer wall of each hollow flexible tube 21 being spaced apart from each other; an outer sheath 24 sleeved on the hollow flexible tube 21, and the outer sheath 24 wrapping around the plurality of wire cores 23 on the corresponding hollow flexible tube 21; an elastic element 3, located inside the outer sheath 1 and elastically connected to the inner wall of the outer sheath 1; an armor layer 4, sleeved on the outer sheath 1; and a sheath 5, sleeved on the armor layer 4.

[0030] It needs to be clarified that: conductor 2 is installed inside the outer sheath 1, which protects conductor 2; elastic element 3 is installed inside the outer sheath 1, which helps the cable recover after being squeezed and deformed; armor layer 4 strengthens the cable; and sheath 5 further strengthens the entire cable, improving its wear resistance. Conductor 2 consists of hollow flexible tube 21, first filler 22, conductor 23, and outer tube 24. Multiple conductors 23 are arranged and wound around the hollow flexible tube 21 with a certain gap between them. When the cable is pulled, the conductors 23 will stretch and squeeze the hollow flexible tube 21, preventing the conductors 23 from being directly subjected to rigid tension and thus avoiding damage or even breakage. This ensures the normal signal transmission of the conductors 23 in the cable. The first filler 22 inside the hollow flexible tube 21 has a certain elasticity, which allows the conductors 23 to return to their initial state when there is no tension. The outer tube 24 and hollow flexible tube 21 restrict the conductors 23 in the gap between them, limiting the position of the conductors 23.

[0031] Example 2

[0032] Please see Figure 2 , Figure 2 This is a schematic diagram of the structure of the outer sheath 1 in this invention. This embodiment focuses on a detailed description of the outer sheath 1, building upon the previous embodiment. Specifically, the outer sheath 1 includes an anti-corrosion layer 11, an insulating layer 12, and a magnetically non-magnetic layer 13, arranged sequentially from the outside in. A filler material fills the gaps between the magnetically non-magnetic layer 13 and the multiple conductors 2.

[0033] It should be noted that the outer sheath 1 of the cable, which is composed of anti-corrosion layer 11, insulation layer 12 and magnetic insulation layer 13, has anti-corrosion, insulation and magnetic insulation properties, so that the cable has corrosion resistance, insulation and electromagnetic interference protection functions.

[0034] Example 3

[0035] This embodiment, based on the previous embodiment, focuses on a detailed description of the materials of the anti-corrosion layer 11, the insulation layer 12, and the non-magnetic layer 13. Specifically, the anti-corrosion layer 11 is made of a mixture of nano-carbon black and bimodal polyethylene, the insulation layer 12 is made of silicone rubber, and the non-magnetic layer 13 is made of a mixture of silicon nitride ceramic powder.

[0036] It should be noted that: the anti-corrosion layer 11, made of a mixture of nano-carbon black and bimodal polyethylene, has strong anti-corrosion performance; the insulation layer 12, made of silicone rubber, has good insulation properties and excellent resistance to high and low temperatures, which is beneficial for the use of cables underground; and the magnetic insulation layer 13, made of a mixture of silicon nitride ceramic powder, has excellent magnetic insulation properties, which can prevent the cable from being affected by external electromagnetic interference and thus its signal transmission.

[0037] Example 4

[0038] Please see Figure 6 This is a schematic diagram of the structure of the elastic element 3 in this invention. Based on the previous embodiment, this embodiment focuses on a detailed description of the elastic element 3. Specifically, the elastic element 3 includes an elastic tube 31, which is located inside the non-magnetic layer 13. The elastic tube 31 is centrally located and filled with a second filler 32. Multiple sets of vertically arranged arc-shaped elastic rods 33 are installed on the outer wall of the elastic tube 31, and multiple arc-shaped elastic rods 33 in each set surround the elastic tube 31.

[0039] It should be noted that the elastic element 3, consisting of the elastic tube 31, the second filler 32, and the arc-shaped elastic rod 33, has excellent elastic recovery force. The elastic element 3 is installed inside the outer sheath 1 and works with the conductor 2 and filler to support the outer sheath 1. When the cable is compressed, it will compress the arc-shaped elastic rod 33 on the outside of the elastic tube 31 and compress the elastic tube 31, thus reducing the sudden impact force on the cable and protecting the cable. After the cable is no longer compressed, it works with the filler and other components to enhance the recovery of the cable's condition.

[0040] Example 5

[0041] Please see Figure 3 , Figure 3 This is a schematic diagram of the structure of the conductors 2 distributed around the elastic element 3 in this invention. Based on the previous embodiment, this embodiment focuses on a detailed description of the positions of the conductors 2 and the elastic element 3. Specifically, multiple conductors 2 and multiple arc-shaped elastic rods 33 are arranged alternately, and the side of the arc-shaped elastic rods 33 away from the elastic tube 31 abuts against the magnetically insulating layer 13.

[0042] It should be noted that: the conductor 2 is located between two adjacent arc-shaped elastic rods 33, which allows multiple conductors 2 to be evenly distributed inside the outer sheath 1, so that the cable is subjected to uniform force.

[0043] Example 6

[0044] The armor layer 4 is formed by multiple steel wires wrapped around the anti-corrosion layer 11.

[0045] It should be noted that multiple steel wires are spring-shaped and tightly fitted together on the anti-corrosion layer 11 to form the external armor of the cable, thereby strengthening the cable's tensile strength.

[0046] Example 7

[0047] Please see Figure 7 , Figure 7 This is a schematic diagram of the structure of the sheath 5 in this invention. Based on the previous embodiment, this embodiment focuses on a detailed description of the structure of the sheath 5. Specifically, the sheath 5 includes an anti-wear tube 51, which is sleeved on the outside of the armor layer 4. The outer wall of the anti-wear tube 51 is provided with an external leakage strip 52, and multiple external leakage strips 52 are arranged around the outside of the armor layer 4.

[0048] It should be noted that the sheath 5 is composed of multiple exposed strips 52 arranged in a ring around the outside of the anti-wear tube 51. The sheath 5 protects the armor layer 4 and prevents it from rusting. At the same time, the armor made of steel wire may have burrs, etc., which are covered by the anti-wear tube 51 to improve the safety of the cable. When the cable is dragged on the ground, the anti-wear tube 51 does not directly contact the ground, but the exposed strips 52 contact the ground to protect the anti-wear tube 51 and improve the service life of the sheath 5.

[0049] Example 8

[0050] The wear-resistant tube 51 is bonded to the armor layer 4 with adhesive.

[0051] It should be noted that the anti-wear tube 51 is bonded to the steel wire in the armor layer 4 to ensure a firm connection between the two and prevent the sheath 5 from loosening.

[0052] Example 9

[0053] The filler, the first filler 22 and the second filler 32 are both elastic plastics.

[0054] It should be noted that elastic plastics have a certain degree of elasticity and resilience, and are inexpensive to manufacture.

[0055] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A video data acquisition wireline, characterized by, The utility model relates to a kind of cable, including: Outer cladding (1), multiple wires (2) are arranged inside the outer cladding (1) surrounds, and the gap between outer cladding (1) and multiple wires (2) is filled with filler, the wire (2) includes hollow hose (21), the inside hollow of the hollow hose (21) is filled with first filler (22), and multiple wire cores (23) are arranged on the outer side wall of hollow hose (21) and surround, and multiple wire cores (23) are all around the outer side wall of hollow hose (21), every two wire cores (23) that are adjacent around the outer side wall of hollow hose (21) are arranged away from each other, and outer cladding pipe (24) is further sleeved on the hollow hose (21), and outer cladding pipe (24) is wrapped multiple wire cores (23) on the corresponding hollow hose (21) and is arranged; Elastic member (3), the elastic member (3) is located inside outer cladding (1) and is elastically connected with the inner wall of outer cladding (1); Armour layer (4), the armour layer (4) is sleeved on outer cladding (1); Sheath (5), the sheath (5) is sleeved on armour layer (4); The outer cladding (1) includes anticorrosive layer (11), insulating layer (12) and diamagnetic layer (13), and anticorrosive layer (11), insulating layer (12) and diamagnetic layer (13) are sequentially arranged from outside to inside, the filler is filled in the gap between diamagnetic layer (13) and multiple wires (2), the anticorrosive layer (11) selects nanometer carbon black and bimodal polyethylene mixed material as anticorrosive material, the insulating layer (12) selects silicone rubber material as insulating material, the diamagnetic layer (13) selects silicon nitride ceramic powder mixed material as diamagnetic material, the elastic member (3) includes elastic tube (31), the elastic tube (31) is located inside diamagnetic layer (13), and the elastic tube (31) is for central control and is filled with second filler (32) inside, the outer side wall of the elastic tube (31) is installed with multiple groups of arc-shaped elastic rods (33) arranged vertically, and multiple arc-shaped elastic rods (33) in every group of arc-shaped elastic rods (33) are arranged around the elastic tube (31).

2. The video data acquisition wireline of claim 1, wherein, Multiple wires (2) and multiple arc-shaped elastic rods (33) are staggered, and the side of arc-shaped elastic rod (33) away from the elastic tube (31) is arranged against diamagnetic layer (13).

3. The video data acquisition wireline of claim 1, wherein, The armour layer (4) is formed by multiple steel wires around anticorrosive layer (11).

4. The video data acquisition wireline of claim 3, wherein, The sheath (5) includes anti-abrasion pipe (51), the anti-abrasion pipe (51) is sleeved on the outside of armour layer (4), and the outer side wall of anti-abrasion pipe (51) is provided with outer leakage strip (52), multiple outer leakage strips (52) are arranged around the outside of armour layer (4).

5. The video data acquisition wireline of claim 4, wherein, The anti-abrasion pipe (51) is bonded with armour layer (4) by adhesive.

6. The video data acquisition wireline of claim 1, wherein, The filler, first filler (22) and second filler (32) are all elastic plastics.

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