Anti-interference underground detection connecting cable

Abstract

The utility model belongs to the technical field of cables, and discloses an anti-interference underground detection connection cable which comprises a sheath layer, a reinforcing layer is arranged in the sheath layer, a damp-proof layer is arranged in the reinforcing layer, a shielding layer is arranged in the damp-proof layer, limiting protrusions are arranged in the shielding layer, and the limiting protrusions are wrapped with flame-retardant filler. A supporting pipe wraps the center of the interior of the flame-retardant filler, a core pipe is arranged between the supporting pipe and the limiting protrusions, and a wire core is arranged in the core pipe. The sheath layer, the reinforcing layer, the damp-proof layer, the shielding layer, the limiting protrusions, the flame-retardant filler, the supporting pipe, the core pipe and the wire cores can deal with detection environments with high and low temperature and large acid-base difference, interference of the external environment and the interior of the cable is reduced, meanwhile, it is avoided that sharp foreign matter is prone to scratching the cable skin, consequently, the cable is damaged and exposed, and the service life of the cable is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of Y technology, and in particular to an anti-interference downhole detection connection cable. Background Technology

[0002] Downhole exploration connection cables are also known as logging cables. They are used for logging, perforation, coring and other operations in various oil and gas wells. They can also be used for water conservancy and hydrological surveying, coalfield geological exploration, geothermal logging and other fields. They are the connection lines between surface systems and underground instruments for load-bearing connection and transmission of measurement data.

[0003] Chinese utility model patent with publication number CN202420841668.8 discloses an anti-interference downhole detection connection cable, including a cable body and an armor sleeve. The cable body includes a conductor part, an insulation part, and a protective part arranged from the inside out. The conductor part includes multiple interwoven core wires. The inner wall of the insulation part is attached to the outer wall of the conductor part. The inner wall of the protective part is attached to the outer wall of the insulation part. The inner wall of the armor sleeve is attached to the outer wall of the protective part. The armor sleeve is made of metal.

[0004] Regarding the aforementioned technologies, the inventors believe that the following defects exist: due to the complex environment underground, the armored sleeves installed on the aforementioned connecting cables are difficult to cope with detection environments with large differences in high and low temperatures and acid and alkali, and sharp foreign objects can easily scratch the cable sheath, causing cable damage and exposure, thus reducing the service life of the cables. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides an anti-interference downhole detection connection cable.

[0006] The above-mentioned technical objective of this utility model is achieved through the following technical solution: an anti-interference downhole detection connection cable, including a sheath layer, a reinforcing layer inside the sheath layer, a moisture-proof layer inside the reinforcing layer, a shielding layer inside the moisture-proof layer, a limiting protrusion inside the shielding layer, a flame-retardant filler wrapped around the outside of the limiting protrusion, a support tube wrapped around the center of the flame-retardant filler, a core tube between the support tube and the limiting protrusion, and a wire core inside the core tube.

[0007] By adopting the above technical solutions, the sheath layer, reinforcement layer, moisture-proof layer, shielding layer, limiting protrusion, flame-retardant filler, support tube, core tube and wire core can cope with detection environments with large differences in high and low temperatures and acid and alkali, reduce interference from the external environment and the inside of the cable, and at the same time avoid sharp foreign objects from easily scratching the cable sheath and causing cable damage and exposure, thus improving the service life of the cable.

[0008] Furthermore, the moisture-proof layer is made of polyurethane foam.

[0009] By adopting the above technical solution, a moisture-proof layer made of polyurethane foam is set up to prevent moisture from entering and contacting the wire core, thereby improving the service life and anti-interference ability of the cable.

[0010] Furthermore, the reinforcing layer is a polytetrafluoroethylene sheath with a metal mesh embedded in it.

[0011] By adopting the above technical solution, and by setting a reinforcing layer composed of a polytetrafluoroethylene sheath with a pre-embedded metal mesh, the cable's compressive and tensile strength is enhanced, preventing the cable from breaking during movement. At the same time, the cable's heat resistance, cold resistance, and acid and alkali resistance are also enhanced.

[0012] Furthermore, the outer wall of the sheath layer is provided with annularly distributed wear-resistant pads, and the outer wall of the wear-resistant pads is provided with strip-shaped friction strips, and the wear-resistant pads are neoprene rubber pads.

[0013] By adopting the above technical solution, the wear-resistant pads that are evenly distributed on the outer wall of the sheath layer can prevent sharp objects from scratching the cable during downhole exploration. The friction strips set on the outer wall of the wear-resistant pads can reduce the bending of the cable as it moves with the exploration instrument, reduce the friction between the outer wall of the cable and the downhole ground, and thus protect the outer wall of the cable when it moves.

[0014] Furthermore, the limiting protrusion is arc-shaped, and a mating groove is provided inside the limiting protrusion. An anti-torsion structural plate is slidably connected inside the mating groove. The anti-torsion structural plate is set on the inner wall of the support tube, and a core tube is provided between two adjacent anti-torsion structural plates.

[0015] By adopting the above technical solution, the core tubes are equidistantly distributed through the setting of support tubes, anti-interference strips, anti-torsion structural plates, docking grooves and limiting protrusions, providing internal support for the cable and preventing foreign objects from falling and damaging the cable during underground exploration, thereby improving the stability of cable transmission.

[0016] Furthermore, the anti-torsion structural plate is a thermoplastic elastic plate, and an anti-interference strip is provided inside the anti-torsion structural plate, which is an aluminum foil-wrapped shielding strip.

[0017] By adopting the above technical solution, the anti-interference strip formed by aluminum foil-wrapped shielding tape can reduce the mutual influence between cables, enhance the internal anti-interference capability of the cable, and ensure the transmission efficiency of the circuit.

[0018] Furthermore, the flame-retardant filler is made of highly flame-retardant polyethylene.

[0019] By adopting the above technical solution and using flame-retardant filler made of high flame-retardant polyethylene material, auxiliary fixation can be provided for the core tube between the support tube, the anti-torsion structural plate and the limiting protrusion, while enhancing the flame-retardant and heat-resistant effect of the cable.

[0020] Furthermore, the shielding layer is a copper wire braided tape shielding layer.

[0021] By adopting the above technical solution, the copper wire braided tape shielding layer can enhance the cable's anti-interference capability.

[0022] In summary, this utility model has the following beneficial effects:

[0023] 1. In this application, the wear-resistant pads evenly distributed on the outer wall of the sheath layer can prevent sharp objects from scratching the cable during downhole exploration. The friction strips on the outer wall of the wear-resistant pads can reduce bending of the cable as it moves with the exploration instrument, thereby reducing the friction between the cable outer wall and the downhole surface and protecting the cable outer wall when it moves. The reinforcing layer composed of a polytetrafluoroethylene sheath with a pre-embedded metal mesh enhances the cable's compressive and tensile strength, preventing the cable from breaking during movement, and also enhances the cable's heat resistance, cold resistance, and acid and alkali resistance.

[0024] 2. In this application, a moisture-proof layer is made of polyurethane foam to prevent moisture from entering and contacting the wire core, thereby improving the service life and anti-interference ability of the cable. The support tube, anti-interference strip, anti-torsion structure plate, docking groove and limiting protrusion facilitate the equidistant distribution of the core tube. At the same time, the anti-interference strip formed by aluminum foil wrapped shielding strip can reduce the mutual influence between cables, enhance the internal anti-interference ability of the cable, and ensure the transmission efficiency of the circuit.

[0025] 3. In this application, by using a flame-retardant filler made of high flame-retardant polyethylene material, it can provide auxiliary fixation for the core tube between the support tube, the anti-torsion structural plate and the limiting protrusion, while enhancing the flame-retardant and heat-resistant effect of the cable. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0027] Figure 2 This is a cross-sectional structural schematic diagram of an embodiment of the present utility model;

[0028] Figure 3 This is a schematic diagram of the structure of the support tube, anti-interference strip, and anti-torsion structural plate in the embodiment of this utility model.

[0029] In the diagram: 1. Sheath layer; 11. Wear-resistant pad; 12. Friction strip; 2. Reinforcing layer; 3. Moisture-proof layer; 4. Shielding layer; 5. Limiting protrusion; 51. Flame-retardant filler; 6. Support tube; 61. Anti-interference strip; 62. Anti-torsion structural plate; 63. Connecting groove; 7. Core tube; 71. Wire core. Detailed Implementation

[0030] The technical solutions in 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, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0031] like Figure 1-3 As shown in the figure, this application discloses an anti-interference downhole detection connection cable, including a sheath layer 1, a reinforcing layer 2 inside the sheath layer 1, a moisture-proof layer 3 inside the reinforcing layer 2, a shielding layer 4 inside the moisture-proof layer 3, a limiting protrusion 5 inside the shielding layer 4, a flame-retardant filler 51 wrapped around the outside of the limiting protrusion 5, a support tube 6 wrapped around the center of the flame-retardant filler 51, a core tube 7 between the support tube 6 and the limiting protrusion 5, and a wire core 71 inside the core tube 7.

[0032] The moisture-proof layer 3 is made of polyurethane foam.

[0033] The reinforcing layer 2 is a polytetrafluoroethylene sheath with a metal mesh embedded in it.

[0034] The outer wall of the sheath layer 1 is provided with annularly distributed wear-resistant pads 11, and the outer wall of the wear-resistant pads 11 is provided with strip-shaped friction strips 12. The wear-resistant pads 11 are neoprene rubber pads.

[0035] The limiting protrusion 5 is arc-shaped, and a docking groove 63 is provided inside the limiting protrusion 5. An anti-torsion structural plate 62 is slidably connected inside the docking groove 63. The anti-torsion structural plate 62 is set on the inner wall of the support tube 6, and a core tube 7 is provided between two adjacent anti-torsion structural plates 62.

[0036] The anti-torsion structural plate 62 is a thermoplastic elastic plate, and an anti-interference strip 61 is provided inside the anti-torsion structural plate 62. The anti-interference strip 61 is an aluminum foil wound shielding strip.

[0037] The flame-retardant filler 51 is made of high flame-retardant polyethylene.

[0038] The shielding layer 4 is a copper wire braided tape shielding layer.

[0039] The operating principle of the anti-interference downhole detection connection cable in this embodiment is as follows: The wear-resistant pads 11, evenly distributed on the outer wall of the sheath layer 1, prevent sharp objects from scratching the cable during downhole detection. Friction strips 12 on the outer wall of the wear-resistant pads 11 reduce bending of the cable as it moves with the detection instrument, lowering the friction between the cable's outer wall and the downhole surface, thus protecting the cable's outer wall during movement. A reinforcing layer 2, composed of a polytetrafluoroethylene sheath with a pre-embedded metal mesh, enhances the cable's compressive and tensile strength, preventing breakage during movement. It also enhances the cable's heat resistance, cold resistance, and acid and alkali resistance. A moisture-proof layer 3 made of polyurethane foam is used to prevent moisture from entering and contacting the core 71, thereby improving the cable's service life and anti-interference ability. The support tube 6, anti-interference strip 61, anti-torsion structural plate 62, mating groove 63, and limiting protrusion 5 facilitate the equidistant distribution of the core tubes 7. At the same time, the anti-interference strip 61, which is formed by aluminum foil-wrapped shielding tape, can reduce the mutual influence between cables, enhance the internal anti-interference ability of the cable, and ensure the transmission efficiency of the circuit. The flame-retardant filler 51 made of high flame-retardant polyethylene material can provide auxiliary fixation for the core tubes 7 between the support tube 6, anti-torsion structural plate 62, and limiting protrusion 5, while also enhancing the flame-retardant and heat-resistant effect of the cable.

[0040] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. An anti-interference downhole detection connection cable, comprising a sheath layer (1), characterized in that: The sheath layer (1) has a reinforcing layer (2) inside, the reinforcing layer (2) has a moisture-proof layer (3) inside, the moisture-proof layer (3) has a shielding layer (4) inside, the shielding layer (4) has a limiting protrusion (5) inside, the limiting protrusion (5) is wrapped with flame-retardant filler (51) on the outside, the flame-retardant filler (51) has a support tube (6) wrapped in the center inside, the support tube (6) and the limiting protrusion (5) have a core tube (7) between them, and the core tube (7) has a wire core (71) inside.

2. The anti-interference downhole detection connection cable according to claim 1, characterized in that: The moisture-proof layer (3) is made of polyurethane foam.

3. The anti-interference downhole detection connection cable according to claim 1, characterized in that: The reinforcing layer (2) is a polytetrafluoroethylene sheath with a metal mesh embedded in it.

4. The anti-interference downhole detection connection cable according to claim 1, characterized in that: The outer wall of the sheath layer (1) is provided with annularly distributed wear-resistant pads (11), and the outer wall of the wear-resistant pads (11) is provided with strip-shaped friction strips (12). The wear-resistant pads (11) are neoprene rubber pads.

5. The anti-interference downhole detection connection cable according to claim 1, characterized in that: The limiting protrusion (5) is arc-shaped, and a docking groove (63) is provided inside the limiting protrusion (5). An anti-torsion structural plate (62) is slidably connected inside the docking groove (63). The anti-torsion structural plate (62) is set on the inner wall of the support tube (6), and a core tube (7) is provided between two adjacent anti-torsion structural plates (62).

6. The anti-interference downhole detection connection cable according to claim 5, characterized in that: The anti-torsion structural plate (62) is a thermoplastic elastic plate, and an anti-interference strip (61) is provided inside the anti-torsion structural plate (62). The anti-interference strip (61) is an aluminum foil wound shielding strip.

7. The anti-interference downhole detection connection cable according to claim 1, characterized in that: The flame-retardant filler (51) is made of high flame-retardant polyethylene.

8. The anti-interference downhole detection connection cable according to claim 1, characterized in that: The shielding layer (4) is a copper wire braided tape shielding layer.

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