Low-temperature-resistant and bending-resistant cable for plateau drilling device

Abstract

The utility model relates to cable technical field, concretely is a kind of low-temperature-resistant bending-resistant cable for plateau drilling device, including outer sheath, the inner sheath is arranged in outer sheath, fiber+tin-plated copper wire braiding reinforcing layer is arranged between the inner sheath with the outer sheath, the inner sheath is arranged in cable core, the cable core includes multiple control line core, each control line core includes conductor that is paired twisted distribution and is coated with insulating layer outside, and the screen shielding layer that is coated in paired conductor outside.The utility model provides a kind of low-temperature-resistant bending-resistant cable for plateau drilling device, is arranged by the outer sheath, insulating layer, paired twisted wire core, fiber+tin-plated copper wire braiding reinforcing layer, so that the cable has oil resistance, high strength, low-temperature resistance and good flexibility simultaneously, greatly increase the bending resistance of the cable.

Description

Technical Field

[0001] This utility model relates to the field of cable technology, specifically to a low-temperature resistant and bend-resistant cable for high-altitude drilling equipment. Background Technology

[0002] The environmental conditions in high-altitude areas are complex and variable, especially the low-temperature environment, which places higher demands on cable performance. During high-altitude drilling operations, cables need to withstand extreme temperature changes, from normal temperatures to extremely cold environments. These temperature changes can cause ordinary cable materials to harden and become brittle, affecting their elasticity and bending performance. Drilling rigs require frequent movement and bending during operation, necessitating cables with excellent bending resistance, as well as resistance to oil, ultraviolet radiation, and environmental aging, to ensure the normal operation of the drilling rig. Therefore, developing low-temperature resistant and bending-resistant cables is crucial for adapting to the high-altitude drilling environment. To this end, a low-temperature resistant and bending-resistant cable for high-altitude drilling rigs is proposed. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this utility model proposes a low-temperature resistant and bend-resistant cable for high-altitude drilling equipment.

[0004] The technical problem to be solved by this utility model is achieved by the following technical solution:

[0005] A low-temperature resistant and bend-resistant cable for high-altitude drilling equipment includes an outer sheath, an inner sheath inside the outer sheath, a fiber + tinned copper wire braided reinforcement layer between the inner sheath and the outer sheath, and a cable core inside the inner sheath. The cable core includes multiple control cores, each control core including a conductor that is twisted and covered with an insulation layer, and a shielding layer covering the twisted conductor.

[0006] As a further improvement of the present invention, the outer sheath is composed of high-polymer polyvinyl chloride resin powder, plasticizer, composite flame retardant, nitrile rubber powder, color powder, UV stabilizer, lubricant, high-temperature stabilizer, antioxidant, and cold resistant agent.

[0007] As a further improvement of the present invention, the fiber + tinned copper wire braided reinforcing layer is formed by aramid fiber braiding + tinned copper wire braiding, with a braiding density of 90% to 92% and a braiding angle of 55° to 65°.

[0008] As a further improvement of the present invention, the cable core has a cable section ratio of 8 to 10 times.

[0009] As a further improvement of the present invention, the multiple control wire cores are all arranged in a ring shape with twisted pairs, and the twisted pair diameter ratio is 10 to 12 times.

[0010] As a further improvement of the present invention, the shielding layer is an aluminum foil shielding layer.

[0011] As a further improvement of the present invention, the insulating layer is a styrene-ethylene type TPE insulating material.

[0012] As a further improvement of the present invention, the conductor is composed of multiple strands of fine tin-plated copper wires twisted together, with an aramid fiber tensile core inside, and the conductor bundle diameter ratio is ≤14 times.

[0013] The beneficial effects of this utility model are:

[0014] This utility model provides a low-temperature resistant and bend-resistant cable for high-altitude drilling equipment. Through the setting of an outer sheath, insulation layer, twisted pair core, and fiber + tinned copper wire braided reinforcement layer, the cable simultaneously possesses oil resistance, high strength, low temperature resistance, and good flexibility, greatly increasing the cable's bend resistance. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0016] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0017] In the diagram: 1. Outer sheath; 2. Fiber + tinned copper wire braided reinforcement layer; 3. Inner sheath; 4. Cable core; 5. Shielding layer; 6. Control wire core; 7. Insulation layer; 8. Conductor. Detailed Implementation

[0018] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the utility model will be further described below in conjunction with the accompanying drawings and embodiments.

[0019] like Figure 1As shown, a low-temperature resistant and bend-resistant cable for high-altitude drilling equipment includes an outer sheath 1. The outer sheath 1 is composed of high-polymer polyvinyl chloride resin powder, plasticizer, composite flame retardant, nitrile rubber powder, colorant, UV stabilizer, lubricant, high-temperature stabilizer, antioxidant, and cold-resistant agent. Main performance indicators: tensile strength ≥15 MPa, elongation at break ≥250%, oil resistance test (ASTM902, 90℃, 24 hours), elongation at break change rate ≤±30%, tensile strength change rate ≤±30%; impact embrittlement temperature -50℃ passed; thermal aging test (135℃, 168 hours), elongation at break change rate ≤±30%, tensile strength change rate ≤±30%; sunlight resistance 1008h, elongation at break change rate ≤±25%, tensile strength change rate ≤±25%; oxygen index not less than 28; thermal stability time at 200℃ ≥120 min. An inner sheath 3 is provided inside the outer sheath 1. A fiber + tinned copper wire braided reinforcement layer 2 is provided between the inner sheath 3 and the outer sheath 1. The fiber + tinned copper wire braided reinforcement layer 2 is formed by aramid fiber braiding and tinned copper wire braiding, consisting of 24 spindles, of which 12 are fiber spindles and 12 are copper wire spindles. The braiding density is 90% to 92%, and the braiding angle is 55° to 65°. A cable core 4 is provided inside the inner sheath 3. The cable core 4 has a cable pitch ratio of 8 to 10. The cable core 4 includes multiple control cores 6, which are twisted pairs arranged in a ring, with a twist pitch ratio of 10 to 12. In this embodiment, 30 control cores 6 are provided. Each control core 6 includes a conductor 8 that is twisted and covered with an insulation layer 7, and a shielding layer 5 covering the twisted conductor 8. The insulation layer 7 is a styrene-ethylene TPE insulation material, enabling the cable to withstand environments ranging from -50℃ to 105℃. The conductor 8 comprises 60 tin-plated wires, composed of multiple strands of fine tin-plated copper wires twisted together, with an internal aramid fiber tensile core, and a conductor bundle diameter ratio ≤ 14. The secondary shielding layer 5 is an aluminum foil shielding layer.

[0020] The outer sheath 1 is made of flame-retardant, oil-resistant, cold-resistant, and UV-resistant sheath material, allowing the cable to operate at a long-term allowable temperature of -50 to 105°C. The styrene-ethylene TPE insulation layer 7, which is adaptable to environments ranging from -50°C to 105°C, provides the cable with oil resistance, impact resistance, high strength, UV resistance, fatigue resistance, low-temperature resistance, and good flexibility. Furthermore, the use of a multi-strand fine conductor stranding process, with aramid fibers in each conductor core, twisted between every two cores, and an aluminum foil wrapping shielding layer, along with small pitch control during cabling and tin-plated wire + fiber braided overall shielding, significantly increases the cable's bending resistance. It can withstand ≥200,000 bends without conductor breakage, and the insulation and sheath remain crack-free.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A low-temperature resistant and bend-resistant cable for high-altitude drilling equipment, characterized in that: It includes an outer sheath (1), an inner sheath (3) is provided inside the outer sheath (1), a fiber + tinned copper wire braided reinforcement layer (2) is provided between the inner sheath (3) and the outer sheath (1), a cable core (4) is provided inside the inner sheath (3), the cable core (4) includes multiple control wire cores (6), each control wire core (6) includes a conductor (8) that is twisted and covered with an insulation layer (7) and a shielding layer (5) covering the outside of the twisted conductor (8).

2. The low-temperature resistant and bend-resistant cable for high-altitude drilling equipment according to claim 1, characterized in that: The fiber + tinned copper wire braided reinforcing layer (2) is formed by aramid fiber braiding + tinned copper wire braiding, with a braiding density of 90% to 92% and a braiding angle of 55° to 65°.

3. The low-temperature resistant and bend-resistant cable for high-altitude drilling equipment according to claim 1, characterized in that: The cable core (4) has a cable section diameter ratio of 8 to 10.

4. The low-temperature resistant and bend-resistant cable for high-altitude drilling equipment according to claim 1, characterized in that: Multiple control wire cores (6) are twisted pairs and are distributed in a ring, with a twisted section diameter ratio of 10 to 12.

5. The low-temperature resistant and bend-resistant cable for high-altitude drilling equipment according to claim 1, characterized in that: The shielding layer (5) is an aluminum foil shielding layer.

6. The low-temperature resistant and bend-resistant cable for high-altitude drilling equipment according to claim 1, characterized in that: The insulating layer (7) is a styrene-ethylene type TPE insulating material.

7. The low-temperature resistant and bend-resistant cable for high-altitude drilling equipment according to claim 1, characterized in that: The conductor (8) is composed of multiple strands of fine tin-plated copper wires twisted together, with an aramid fiber tensile core inside, and the conductor bundle diameter ratio is ≤14 times.

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