High insulation resistance refractory ceramic rubber for heating cable and preparing method thereof

A technology of high-temperature-resistant ceramics and heating cables, which is applied in the field of ceramic rubber, can solve problems such as the downhole oil temperature is not reached, insulation wrapping is not moisture-proof and easy to break down, etc., achieves good moisture-proof insulation effect, improves mechanical properties and insulation performance, and high Effect of Insulation Resistance

Active Publication Date: 2016-09-28
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 refractory ceramic rubber for heating cable and preparing method thereof
  • High insulation resistance refractory ceramic rubber for heating cable and preparing method thereof

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Comparison scheme
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 high insulation resistance refractory ceramic rubber for a heating cable and a preparing method thereof. The ceramic rubber is mainly prepared from, by weight, 40-45 parts of silicone rubber, 20-25 pars of ceramic powder, 15-20 parts of glass powder, 5-10 parts of quartz powder, 8-10 parts of mica powder, 5-10 parts of vapor phase method white carbon black, 0.5-1 part of coupling agent, 2-5 parts of softening agent and 0.8-1 part of 2,5-dimethyl-2,5-di(tert-butylperoxy)hexane. The preparing method comprises the steps of placing the raw materials in a rubber mixing mill for mixing, wherein mixing temperature is controlled to be 50-60 DEG C, and mixing time is 15-20 min; then conducting filtration with a rubber filter to obtain the required ceramic rubber, wherein the rubber filter is provided with three layers of filter nets, which are the 20-mesh filter net, the 40-mesh filter net and the 60-mesh filter net from inside to outside in sequence. The ceramic rubber has the advantages of being high in insulation resistance refractory property, good in dampproof insulation effect and long in service life. The operating temperature of the heating cable with the ceramic rubber as an insulating layer can reach 600 DEG C, dampproof insulation effect is good, safety performance is high, and breakdown of the cable can not be caused even if an outer sheath is abraded or soaked.

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 Applications(China)
IPC IPC(8): C08L83/07C08K13/02C08K3/36C08K3/34C08K3/40C08K3/00H01B3/28
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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