Submerged pump cable rubber sheath rubber composition

Abstract

The invention relates to a rubber composition, and especially relates to an ethylene-propylene rubber composition used in a submerged pump cable rubber sheath. The submerged pump cable rubber sheath rubber composition comprises the materials of, by weight, 100 parts of EPDM, 10-15 parts of EVM (VM content being no lower than 70%), 5-10 parts of nano-scale zinc oxide, 1-2 parts of industrial stearic acid, 1-1.5 parts of an anti-hydrolysis agent P-50, 1-1.5 parts of a silane coupling agent A-172, 100-120 parts of silane-modified calcined clay, and 4.5-5.5 parts of a peroxide vulcanizing agent. The materials in the above proportion are subjected to mixing, open-milling, straining, tabletting, and slicing or granulating, such that the rubber composition is obtained. The composition provided by the invention has high temperature-resistance grade. With the rubber composition, various performance requirements of export submerged pump cable can be satisfied.

Description

technical field [0001] The invention relates to a rubber composition, in particular to an ethylene-propylene rubber composition used for the rubber sheath of a submersible oil pump cable. Background technique [0002] The traditional formulation of the cable sheath of the submersible pump uses nitrile rubber as the cable sheath of the submersible pump. Although the sheath has good oil resistance, it has poor bending performance and the surface of the sheath is rough. If the traditional ethylene-propylene rubber is used as the sheath , although it can meet the cable flexibility requirements, it does not have high temperature resistance and sufficient mechanical properties. Traditional EPDM rubber sheaths are generally used on submersible pump cables below 150 ° C. However, with the increase in human demand for oil In the case of continuous decrease of petroleum energy, the exploration of resources deep in the earth's crust is intensified, and the geological conditions of vari...

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Problems solved by technology

[0002] The traditional formulation of the cable sheath of the submersible pump uses nitrile rubber as the cable sheath of the submersible pump. Although the sheath has good oil resistance, it has poor bending performance and the surface of the sheath is rough. If the traditional ethylene-propylene rubber is used as the sheath , although it can meet the cable flexibility requirements, it does not have high temperature resistance and sufficient mechanical properties. Traditional EPDM rubber sheaths are generally used on submersible pump cables below 150 ° C. However, with the increase in human demand for oil In the case of continuous decrease of petroleum energy, the exploration of resources deep in the earth's crust is intensified, and the geological conditions of various oil wells are also different, and the temperature, pressure and medium in the oil wells are different. The existing submersible pump cable The formulation of ethylene-propylene rubber sheath and nitrile rubber sheath can no longer meet the above requirements. Especially in European and American countries, the temperature of the external medium for the long-term use of submersible pump cables is about 200°C. Higher requirements are put forward, and the traditional ethylene-propylene rubber sheath cannot meet the above requirements

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