Square structure logging cable with good stability

Abstract

The utility model relates to well logging cable technical field, concretely discloses square structure well logging cable with good stability, including conductor, two -sided symmetry of conductor is provided with two, and the outside of 2 conductors is connected with insulating layer, the outside of two insulating layers is provided with inner sheath, and the surface of inner sheath is installed with the protection pipe around, and the outside surface of protection pipe is provided with outer sheath around, and the inside of outer sheath is installed with the reinforcing rope around equidistance, the conductor symmetry is arranged in the inside of inner sheath, and the insulating layer symmetry is arranged in the inside of inner sheath, the insulating layer outside is arranged as circular structure. This square structure well logging cable with good stability is provided with outer sheath, and the outer sheath is arranged as square structure, can improve its stability, prevents the rotation of cable and knotted in use, and the shape of square outer sheath can also increase the fixation with downhole oil pipe, can improve the practicality of cable.

Description

Technical Field

[0001] This utility model relates to the field of logging cable technology, specifically to a square-structured logging cable with good stability. Background Technology

[0002] Logging cables are special cables used in oil and gas exploration and development for logging operations. They are the key link between surface equipment and downhole logging instruments. Their core function is to lower logging instruments to a specified depth in the well, while simultaneously powering the instruments, transmitting measurement data, and enabling control. Structurally, logging cables typically use highly conductive copper wire as the conductor to ensure stable signal and power transmission. The outer layer is wrapped with oil-resistant, high-temperature-resistant, and high-pressure-resistant insulating materials, and the outermost layer uses a wear-resistant and corrosion-resistant sheath to protect the internal structure from wellbore friction and oil and gas corrosion. Depending on the application scenario, logging cables can be divided into conventional logging cables, ultra-deep well logging cables, etc. However, existing logging cables are prone to twisting and knotting during use, making it difficult to fix the cable, resulting in poor stability with the tubing. At the same time, the cables have poor rigidity and are easily damaged. Utility Model Content

[0003] The purpose of this invention is to provide a square-structured logging cable with good stability, in order to solve the problems mentioned in the background art, such as the cable being prone to rotation and knotting, the inability to fix the cable, poor stability with the tubing, and poor rigidity, making it easy to be damaged.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a square-structured logging cable with good stability, comprising two conductors symmetrically arranged, and an insulation layer connected to the outer side of each conductor;

[0005] An inner sheath is provided on the outer side of the two insulation layers, and a protective tube is installed around the surface of the inner sheath. An outer sheath is provided around the outer surface of the protective tube, and reinforcing ropes are installed equidistantly around the inside of the outer sheath.

[0006] Preferably, the conductors are symmetrically arranged inside the inner sheath, and the insulating layers are symmetrically arranged inside the inner sheath.

[0007] By adopting the above technical solution, the inner sheath protects the outer side of the conductor, preventing damage to the conductor and improving the safety of conductor use.

[0008] Preferably, the outer side of the insulating layer is configured as a circular structure, and the outer surface of the inner sheath is configured as a circular structure.

[0009] By adopting the above technical solution, the insulation layer can make the whole system more resistant to the downhole hydrogen sulfide environment.

[0010] Preferably, the inner sheath and the protective tube are concentric circles.

[0011] By adopting the above technical solution, the protective tube protects the outer side of the inner sheath, thereby improving the protection of the conductor.

[0012] Preferably, the protective tube is configured as a circular structure and is installed around the outside of the inner sheath.

[0013] By adopting the above technical solution, the corrosion resistance of the cable is enhanced, while the cable is made lighter.

[0014] Preferably, the outer side of the outer sheath is configured as a square structure, and the outer side of the outer sheath is configured as a rounded corner structure, and the protective tube is located at the central axis of the outer sheath.

[0015] By adopting the above technical solution, the square structure of the outer sheath improves the stability of the device and prevents the cable from winding and knotting.

[0016] Preferably, the reinforcing rope is wound around the outside of the protective tube.

[0017] By adopting the above technical solution, the cable's light strength is enhanced by reinforcing ropes, thereby improving the safety of the cable in use.

[0018] Compared with the prior art, the beneficial effects of this utility model are: the square structure logging cable with good stability:

[0019] 1. An outer sheath is provided, which is designed with a square structure to improve its stability and prevent the cable from twisting and knotting during use. At the same time, the shape of the square outer sheath can also increase the fixation with the downhole tubing, thereby improving the practicality of the cable.

[0020] 2. The addition of reinforcing ropes can improve the tensile strength of the cable while reducing its weight, making the cable lightweight and capable of bearing high loads. Furthermore, the winding of the reinforcing ropes evenly distributes stress, improving the safety of the cable during use.

[0021] 3. The outermost structure is designed as a square structure. The flat structure is conducive to fitting the surface of the oil pipe and preventing the cable from rolling and rubbing, thus making its installation more stable. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0023] Figure 2 This is a front view structural diagram of the present invention;

[0024] Figure 3 This is a three-dimensional structural diagram of the inner sheath installation of this utility model;

[0025] Figure 4 This is a three-dimensional structural diagram of the protective tube installation of this utility model.

[0026] In the diagram: 10, conductor; 20, insulation layer; 30, inner sheath; 40, protective tube; 50, outer sheath; 60, reinforcing rope. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Please see Figure 1-4 The present invention provides a technical solution: a square-structured logging cable with good stability, comprising a conductor 10, an insulation layer 20, an inner sheath 30, a protective tube 40, an outer sheath 50, and a reinforcing rope 60;

[0029] The logging cable improves the strength of the device, and the specific implementation method is as follows:

[0030] Two conductors 10 are symmetrically arranged, and an insulation layer 20 is connected to the outside of the two conductors 10. An inner sheath 30 is arranged outside the two insulation layers 20, and a protective tube 40 is installed around the surface of the inner sheath 30. An outer sheath 50 is arranged around the outer surface of the protective tube 40, and reinforcing ropes 60 are installed equidistantly inside the outer sheath 50. The conductors 10 are symmetrically arranged inside the inner sheath 30, and the insulation layers 20 are symmetrically arranged inside the inner sheath 30. The outer side of the insulation layer 20 is set with a circular structure, and the outer surface of the inner sheath 30 is set with a circular structure. The inner sheath 30 and the protective tube 40 are concentric circles. The protective tube 40 is set with a circular ring structure and is installed around the outside of the inner sheath 30. The outer side of the outer sheath 50 is set with a square structure and rounded corners. The protective tube 40 is located at the central axis of the outer sheath 50, and the reinforcing rope 60 is installed around the outside of the protective tube 40.

[0031] Conductors 10 are made of nickel-plated copper stranded together. At the same time, polyimide + PTFE composite insulation material is wrapped around the surface of two conductors 10 to form insulation layer 20. The insulation layers 20 are then positioned correspondingly and placed inside FPA perfluoroalkoxy resin. They are then extruded to form inner sheath 30. The insulation layers 20 are symmetrically placed inside the inner sheath 30. Then, titanium palladium alloy material is laser welded to form a pipe structure, which is wrapped around the surface of the inner sheath 30. The titanium palladium alloy material forms protective tube 40. Carbon fiber rope is wound into a mesh structure to form reinforcing rope 60. The reinforcing rope 60 and protective tube 40 are both placed inside FPA perfluoroalkoxy resin. They are then fixed to the surface of reinforcing rope 60 and protective tube 40 by an extrusion structure to form outer sheath 50. At the same time, the outer sheath 50 is extruded to form a square structure with rounded corners.

[0032] Conductor 10 is made of nickel-plated copper, which is a significant improvement over ordinary copper conductors. The nickel-plated copper of conductor 10 is also more resistant to scratches and wear. Insulation layer 20 is made of polyimide + PTFE composite insulation, which has high inertness and is more resistant to hydrogen sulfide environments. Protective tube 40 is made of titanium-palladium alloy, which has low density and high corrosion resistance. Protective tube 40 reduces the weight of the cable, making it lighter. The addition of 0.15% palladium to the protective tube 40 results in a titanium-palladium alloy density of 4.5g / cm², only half the weight of Inconel 625 alloy (8.44g / cm²). The overall cable weight is reduced from 355kg / km to 295kg / km, combining the advantages of lightweight design and corrosion resistance.

[0033] Meanwhile, both the inner sheath 30 and the outer sheath 50 are made of FPA perfluoroalkoxy resin, which is more resistant to high temperatures. The outer sheath 50 is designed with a square structure to prevent it from tangling.

[0034] Working principle: When using this stable square-structure logging cable, an inner sheath 30, a protective tube 40, an outer sheath 50, and a reinforcing rope 60 are installed to improve the strength of the device and increase its overall practicality.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A square-structured logging cable with good stability, comprising conductors (10), wherein two conductors (10) are symmetrically arranged, and an insulation layer (20) is connected to the outside of the two conductors (10); Its features are: An inner sheath (30) is provided on the outer side of the two insulation layers (20), and a protective tube (40) is installed around the surface of the inner sheath (30). An outer sheath (50) is provided around the outer surface of the protective tube (40), and a reinforcing rope (60) is installed inside the outer sheath (50) at equal intervals.

2. The stable square-structure logging cable according to claim 1, characterized in that: The conductors (10) are symmetrically arranged inside the inner sheath (30), and the insulating layer (20) is symmetrically arranged inside the inner sheath (30).

3. The stable square-structure logging cable according to claim 1, characterized in that: The outer side of the insulating layer (20) is configured with a circular structure, and the outer surface of the inner sheath (30) is configured with a circular structure.

4. The stable square-structure logging cable according to claim 1, characterized in that: The inner sheath (30) and the protective tube (40) are concentric circles.

5. The stable square-structure logging cable according to claim 1, characterized in that: The protective tube (40) is configured as a circular structure and is installed around the outside of the inner sheath (30).

6. The stable square-structure logging cable according to claim 1, characterized in that: The outer side of the outer sheath (50) is configured as a square structure, and the outer side of the outer sheath (50) is configured as a rounded corner structure, and the protective tube (40) is located at the central axis of the outer sheath (50).

7. The stable square-structure logging cable according to claim 1, characterized in that: The reinforcing rope (60) is wrapped around the outside of the protective tube (40).

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