High insulation resistance high temperature resistant ceramic rubber for heating cables and preparation method thereof

A technology of high temperature resistant ceramics and heating cables, applied in the field of ceramic rubber, can solve the problems of not reaching the downhole oil temperature, the insulation wrapping is not moisture-proof and easy to break down, etc. The effect of mechanical strength

Active Publication Date: 2021-10-29
沈兴线缆集团有限公司 +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the heat-resistant temperature of the fluoroplastic film wrapping can reach 250°C. Although the heat-resistant temperature of the heating cable insulation layer has been improved, it still has not reached the downhole oil temperature, and there are problems such as the insulation wrapping is not moisture-proof and easy to break down.

Method used

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  • High insulation resistance high temperature resistant ceramic rubber for heating cables and preparation method thereof
  • High insulation resistance high temperature resistant ceramic rubber for heating cables and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0023] The invention relates to a high-insulation-resistance and high-temperature-resistant ceramic rubber for heating cables, the main components of which are as follows in parts by weight: 40 kg of silicon rubber, 25 kg of ceramic powder, 15 kg of glass powder, 10 kg of quartz powder, and mica powder 8 kg, 10 kg of fumed white carbon black, 0.5 kg of coupling agent, 5 kg of softener, and 0.8 kg of bis-pentasulfurizing agent.

[0024] The silicone rubber is preferably methyl silicone rubber, with a Mooney viscosity ML(1+4) of 30-35 at 180° C. and an ethylene content of 63%. Its function is as the main material, which has the characteristics of low temperature resistance of -50°C and high temperature of 180°C, and does not produce carbides at high temperatures above 300°C, so as to achieve the cable performance required by the present invention.

[0025] The ceramic powder has a particle size of 3000 mesh and a temperature resistance of 1200°C. The ceramic powder mainly plays...

Embodiment 2

[0033] The invention relates to a high-insulation-resistance and high-temperature-resistant ceramic rubber for heating cables, the main components of which are as follows in parts by weight: 45 kg of silicon rubber, 20 kg of ceramic powder, 20 kg of glass powder, 5 kg of quartz powder, and mica powder 10 kg, 5 kg of fumed white carbon black, 1 kg of coupling agent, 2 kg of softener, and 1 kg of bis-pentasulfurizing agent.

[0034] The silicone rubber is preferably methyl silicone rubber, with a Mooney viscosity ML(1+4) of 30-35 at 180° C. and an ethylene content of 63%. Its function is as the main material, which has the characteristics of low temperature resistance of -50°C and high temperature of 180°C, and does not produce carbides at high temperatures above 300°C, so as to achieve the cable performance required by the present invention.

[0035] The ceramic powder has a particle size of 3000 mesh and a temperature resistance of 1200°C. The ceramic powder mainly plays the ...

Embodiment 3

[0043] The invention relates to a high-insulation-resistance and high-temperature-resistant ceramic rubber for heating cables, the main components of which are as follows in parts by weight: 40 kg of silicon rubber, 25 kg of ceramic powder, 15 kg of glass powder, 10 kg of quartz powder, and mica powder 8 kg, 10 kg of fumed white carbon black, 0.5 kg of coupling agent, 5 kg of softener, 0.8 kg of bis-pentasulfurizing agent, 3 kg of anti-aging agent and 2 kg of active agent.

[0044] The silicone rubber is preferably methyl silicone rubber, with a Mooney viscosity ML(1+4) of 30-35 at 180° C. and an ethylene content of 63%. Its function is as the main material, which has the characteristics of low temperature resistance of -50°C and high temperature of 180°C, and does not produce carbides at high temperatures above 300°C, so as to achieve the cable performance required by the present invention.

[0045] The ceramic powder has a particle size of 3000 mesh and a temperature resista...

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Abstract

The invention discloses a ceramic rubber with high insulation resistance and high temperature resistance for heating cables and a preparation method thereof. The main components of the ceramic rubber are as follows in parts by weight: 40-45 parts of silicon rubber, 20-25 parts of ceramic powder, and glass powder 15‑20 parts, 5‑10 parts of quartz powder, 8‑10 parts of mica powder, 5‑10 parts of fumed white carbon black, 0.5‑1 parts of coupling agent, 2‑5 parts of softener, 0.8 parts of double pentasulfurizing agent ‑1 serving. When preparing, put the above raw materials into a rubber mixer for mixing, control the mixing temperature to 50-60°C, and the mixing time is 15-20min; after mixing, filter through a rubber filter to obtain the required ceramic rubber; The filter screen of the glue filter is set to three layers, which are 20 mesh, 40 mesh and 60 mesh from the inside to the outside. The beneficial effects are: high insulation resistance and high temperature resistance, good moisture-proof insulation effect, and long service life; the heating cable made of the ceramic rubber as the insulating layer can use the temperature up to 600 ° C, good moisture-proof insulation effect, high safety performance, even The outer sheath is worn and soaked in water, and the cable will not be broken down.

Description

technical field [0001] The invention relates to a ceramic rubber, in particular to a ceramic rubber with high insulation resistance and high temperature resistance for heating cables and a preparation method thereof. Background technique [0002] Oil well sucker rod heating cables are used in oil production, especially in the process of heavy oil production. Because the underground crude oil contains a large amount of paraffin and asphalt, as the crude oil sucker rod is slowly lifted, the temperature of the crude oil close to the surface layer will drop correspondingly, and the phenomenon of crude oil condensation will occur, and the crude oil flow rate of the oil well will also decrease accordingly and production will be shut down. In order to increase crude oil production, it is necessary to install a heating cable in the sucker rod of the oil well to increase the temperature of crude oil to achieve temperature compensation, thereby improving the flow performance of crude ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L83/07C08K13/02C08K3/36C08K3/34C08K3/40C08K3/013H01B3/28
CPCC08K3/00C08K3/34C08K3/36C08K3/40C08K13/02C08L2201/08C08L2203/202H01B3/28C08L83/04
Inventor 李萌何付领李季刘朝鹏宋建昌
Owner 沈兴线缆集团有限公司
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