Hydrogenated butadiene-acrylonitrile rubber vulcanized rubber with high strength, high pressure resistance and hydrogen sulfide corrosion resistance

Abstract

The invention discloses a hydrogenated butadiene-acrylonitrile rubber vulcanized rubber with high strength, high pressure resistance and hydrogen sulfide corrosion resistance. The hydrogenated butadiene-acrylonitrile rubber vulcanized rubber with high strength, high pressure resistance and hydrogen sulfide corrosion resistance consists of the following raw materials in parts by mass: 100 parts of hydrogenated butadiene-acrylonitrile rubber, 5-20 parts of heat-resisting active agent, 1-4 parts of age resister, 60-120 parts of reinforcing filler, 2-10 parts of plasticizer, 6-10 parts of vulcanization accelerator, 1-4 parts of grapheme and 1-2 parts of processing aid. The vulcanized rubber disclosed by the invention has high tensile strength and hardness and good high-pressure resistance and hydrogen sulfide corrosion resistance.

Description

technical field [0001] The invention relates to a hydrogenated nitrile rubber vulcanizate with high strength, high pressure resistance and hydrogen sulfide corrosion resistance. Background technique [0002] With the consumption of energy, oil and natural gas are decreasing year by year, the difficulty of mining is also escalating, and the working conditions are becoming more and more severe. High temperature, high pressure and strong corrosion are becoming more and more common in oil fields. The common pressure levels in oil fields are 2000psi, 3000psi , 5000psi, 10000psi, 15000psi, 20000psi, in order to withstand such a high pressure, in addition to the reasonable design of the structure, higher requirements are also put forward for the product performance. The strength, hardness, modulus and permanent deformation must reach a certain limit value; oil field The high temperature can be divided into common deep well oil fields of 121°C, 150°C, 177°C, 200°C, and even above 20...

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Problems solved by technology

[0002]With the consumption of energy, oil and natural gas are decreasing year by year, the difficulty of mining is also escalating, and the working conditions are becoming more and more severe. It is becoming more and more common. The common pressure levels in oil fields are 2000psi, 3000psi, 5000psi, 10000psi, 15000psi, 20000psi. To withstand such a high pressure, in addition to the reasonable design of the structure, higher requirements are also put forward for product performance, strength and hardness. , modulus, and permanent deformation must reach a certain limit value; oilfield high temperature can be divided into common 121°C, 150°C, 177°C, 200°C, and even deep well oilfields above 200°C. HNBR is generally used below 177°C If the temperature exceeds 177°C, only fluorine-containing materials can be selected. High temperature will easily cause accelerated aging of the seal, becoming hard and brittle, thus losing elasticity, resulting in seal failure, resulting in leakage and safety accidents; H2 always exists in the oil field S, CO2, CH4 and other acid gases, and H2S is a strong corrosive gas, not only for Metal materials cause strong erosion, and also react with rubber materials, causing accelerated aging, foaming, fracture, and greatly reduced strength and elongation of rubber materials. About 1 / 4 of the oil fields in China are high-sulfur oil and gas fields, so the development It is imminent to develop a high-performance material with high pressure resistance of 20000psi, high temperature resistance of 150 degrees, H2S corrosion resistance, high wear resistance, high hardness, high strength and high modulus

[0003]At present, foreign materials are basically monopolized by several large multinational companies, such as James Walker, Harry Burton, Cameron, FMC, etc., while the development of domestic oilfield rubber materials Late start, long R&D cycle, insufficient investment in R&D funds and personnel, resulting in insufficient level and ability. Large-scale domestic oil fields, especially those with more severe working conditions, can basically only choose foreign materials and products. Domestic seals that have passed NORSOK certification There are very few manufacturers, and the main sealing failure mode is that the sealing material cannot withstand high pressure, high temperature is easy to age, and the resistance to hydrogen sulfide is insufficient

[0004] Hydrogenated nitrile rubber is a common material used for oilfield sealing, mainly used in drilling, blowout, bearings, packers, casings, etc. CN1002140189 discloses A hydrogenated nitrile rubber composition resistant to hydrogen sulfide corrosion has been developed, which can be used in oil and gas environments resistant to hydrogen sulfide, but it is not suitable for high temperature and high pressure applications

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