A nano-coated alloy lead submersible pump cable

Abstract

This utility model relates to a nano-coated alloy lead submersible pump cable, belonging to the technical field of submersible pump cable manufacturing. The technical solution is as follows: a fluororubber insulation layer is extruded over the conductor; a nano-alloy lead layer I is coated over the fluororubber insulation layer; an alloy lead sheath layer is extruded over the nano-alloy lead layer I; a nano-alloy lead layer II is coated over the alloy lead sheath layer; and a semi-conductive nylon tape wrapping layer is wrapped around the nano-alloy lead layer II, forming the core. Multiple cores are arranged side-by-side in an armored steel tape layer. The positive effects of this utility model are: the use of nano-alloy lead spraying technology ensures complete adhesion between the insulation layer and the lead sheath layer, preventing well fluid and well gas from damaging the insulation layer along the insulation and sheath layers; the nano-alloy lead spraying technology on the alloy lead surface compensates for micro-cracks on the lead sheath surface, reducing the electrochemical corrosion resistance of the lead sheath. This improves the cable's service life.

Description

Technical Field

[0001] This utility model relates to a nano-coated alloy lead submersible pump cable, belonging to the field of submersible pump cable manufacturing technology. Background Technology

[0002] The structural and performance requirements for submersible pump cables vary depending on the operating environment. Especially in oil fields and other environments with stringent cable requirements, cables must possess not only excellent mechanical properties but also superior electrical performance. Currently, ordinary submersible pump cables present the following technical problems: Oil wells have multiple cable connections downhole; well fluid and well gas can easily come into contact with the insulation layer between the insulation layer and the lead sheath. The insulation layer expands and cracks upon contact with well fluid, and its aging is accelerated by well gas. Furthermore, the insulation material of the submersible pump cable is prone to oxidation and cracking under the high temperatures of the downhole environment when in contact with air. The lead sheath, when extruded onto the insulation surface, can create small cavities that allow air to come into contact with the insulation, leading to cracking at high temperatures and ultimately insulation failure. Utility Model Content

[0003] The purpose of this invention is to provide a nano-coated alloy lead submersible pump cable. A layer of nano-alloy lead is sprayed onto the surface of the fluororubber insulation layer, which bonds the fluororubber insulation layer to the alloy lead sheath layer, completely isolating the fluororubber insulation layer from contact with well fluid and gas. At the same time, a layer of nano-alloy lead is also sprayed onto the outside of the alloy lead sheath layer, forming a lead oxide film on the surface of the nano-alloy lead, which isolates the air and prevents the alloy lead sheath layer from oxidizing and cracking upon contact with air, thereby improving the service life of the cable and solving the above-mentioned problems in the background art.

[0004] The technical solution of this utility model is:

[0005] A nano-coated alloy lead submersible pump cable comprises a conductor, a fluororubber insulation layer, a nano-coated alloy lead layer I, an alloy lead sheath layer, a nano-coated alloy lead layer II, a semi-conductive nylon tape wrapping layer, and a steel tape armor layer. The conductor is externally encased in a fluororubber insulation layer, which is then coated with the nano-coated alloy lead layer I. The nano-coated alloy lead layer I is externally encased in an alloy lead sheath layer, which is then externally encased in a nano-coated alloy lead layer II. The nano-coated alloy lead layer II is then externally wrapped with a semi-conductive nylon tape wrapping layer, forming a conductor core. Multiple conductor cores are arranged side-by-side in a steel tape armor layer.

[0006] Furthermore, the conductor is a single bare copper conductor.

[0007] Furthermore, the number of wire cores is three, and the three wire cores are arranged side by side with an armored steel strip armor layer.

[0008] Furthermore, the steel strip armor layer is a Z-shaped armored galvanized steel strip or a stainless steel strip.

[0009] The positive effects of this invention are as follows: The use of nano-alloy lead spraying technology ensures complete adhesion between the fluororubber insulation layer and the lead sheath layer, thoroughly isolating the fluororubber insulation layer from contact with the well fluid and gas, thus preventing damage to the fluororubber insulation layer. Simultaneously, nano-alloy lead is also sprayed onto the surface of the alloy lead sheath layer, compensating for micro-cracks on the surface and reducing the electrochemical corrosion resistance of the lead sheath. This improves the cable's service life. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the structure of this utility model;

[0011] In the diagram: 1. Conductor; 2. Fluororubber insulation layer; 3. Nano-alloy lead spray coating layer I; 4. Alloy lead sheath layer; 5. Nano-alloy lead spray coating layer II; 6. Nylon without protective layer; 7. Steel strip armor layer. Detailed Implementation

[0012] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0013] See attached document Figure 1 A nano-coated alloy lead submersible pump cable comprises a conductor 1, a fluororubber insulation layer 2, a nano-coated alloy lead layer I 3, an alloy lead sheath layer 4, a nano-coated alloy lead layer II 5, a semi-conductive nylon tape wrapping layer 6, and a steel tape armor layer 7. The conductor 1 is a single bare copper conductor, with the fluororubber insulation layer 2 extruded over it to improve the cable's insulation performance. The fluororubber insulation layer 2 is coated with the nano-coated alloy lead layer I 3 to bond the insulation layer to the lead sheath layer, preventing well fluid and well gas from contacting the insulation layer. The nano-coated alloy lead layer I 3 is then extruded over the alloy lead sheath layer 4, which is further coated with the nano-coated alloy lead layer II 5 to compensate for micro-cracks on the lead sheath surface and reduce its electrochemical corrosion resistance. The nano-coated alloy lead layer II 5 is wrapped with the semi-conductive nylon tape wrapping layer 6, forming the core. The three cores are then armored side-by-side with the steel tape armor layer 7.

[0014] Preferably, the steel strip armor layer 7 is a Z-shaped armored galvanized steel strip or a stainless steel strip.

[0015] The manufacturing process steps of this utility model are as follows:

[0016] ① The bare copper conductor is provided with a fluororubber insulation layer 2, a nano alloy lead spray coating layer 3, an alloy lead sheath layer 4, a nano alloy lead spray coating layer 5, and a nylon cloth tape wrapping pad layer 6 in sequence to form a wire core, with a total of three wire cores.

[0017] ② Three cables are arranged side by side using Z-shaped armored galvanized steel strip or stainless steel strip to form steel strip armor layer 7. Steel strip armor layer 7 uses 12.7mm wide steel strip from galvanized or stainless steel strip. Armoring process: The armoring machine is placed horizontally and the armoring is completed by pulling and winding the cable. The steel strip overlap rate is ≥30% and the steel strip completely covers the wire core.

[0018] Material selection

[0019] Single bare copper conductor:

[0020] The cross-section of the long straight conductor uses a single bare copper conductor, which is round and smooth without burrs.

[0021] Fluororubber insulation layer:

[0022] The insulation is made of fluororubber, which has good electrical properties with a breakdown field strength of 60 km / mm. Fluororubber is a thermosetting material and has good high-temperature resistance in the environment where the sheath isolates the gas.

[0023] Nano-alloy lead spray coating I:

[0024] A layer of nano-alloy lead is sprayed onto the surface of the fluororubber insulation to bond the fluororubber insulation layer with the alloy lead sheath layer, preventing well fluid and well gas from entering the cable core along the fluororubber insulation layer and the alloy lead sheath layer.

[0025] Alloy lead sheath layer:

[0026] Extruding alloy lead sheath increases the thickness of the alloy lead sheath, improves corrosion resistance, and forms a lead oxide insulating film that completely isolates ethylene propylene insulation from air.

[0027] Nano-alloy lead spray coating II:

[0028] Spraying a layer of nano-alloy lead onto the surface of the alloy lead sheath layer makes the surface of the alloy lead sheath layer smoother, preventing the accumulation of charge caused by micro-cracks on the surface of the alloy lead sheath layer, which would aggravate the electrochemical corrosion of the lead sheath.

[0029] Steel belt armor layer:

[0030] The cable is armored with 12.7mm*0.51mm steel strips in a "Z"-shaped interlocking configuration, which improves its resistance to external forces and its mechanical properties. In the downhole oil well environment, the steel strip armor layer provides mechanical protection and corrosion resistance to the cable. If the steel strip armor layer is damaged by external forces, it prevents the cable core from losing protection, thus extending the cable's service life.

Claims

1. A nanosprayed alloy lead submersible pump cable characterized by: It includes a conductor (1), a fluororubber insulation layer (2), a sprayed nano-alloy lead layer I (3), an alloy lead sheath layer (4), a sprayed nano-alloy lead layer II (5), a semi-conductive nylon tape wrapping pad layer (6), and a steel tape armor layer (7). The conductor (1) is extruded with a fluororubber insulation layer (2), the fluororubber insulation layer (2) is coated with a sprayed nano-alloy lead layer I (3), the sprayed nano-alloy lead layer I (3) is extruded with an alloy lead sheath layer (4), the alloy lead sheath layer (4) is coated with a sprayed nano-alloy lead layer II (5), and the sprayed nano-alloy lead layer II (5) is wrapped with a semi-conductive nylon tape wrapping pad layer (6). The whole constitutes a wire core, and multiple wire cores are armored with a steel tape armor layer (7) side by side.

2. A nanospray alloy lead submersible pump cable according to claim 1, wherein: The conductor (1) is a single bare copper conductor.

3. The nano-coated alloy lead submersible pump cable according to claim 1 or 2, characterized in that: The number of wire cores is three, and the three wire cores are arranged side by side with armored steel strip armor layer (7).

4. A nanospray alloyed lead submersible pump cable according to claim 1 or 2, characterized in that: The steel strip armor layer (7) is a Z-type armored galvanized steel strip or a stainless steel strip.

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