Oilfield ultrahigh-pressure acid-resistant rubber seal material and preparation method thereof

A rubber sealing and ultra-high pressure technology, applied in chemical instruments and methods, other chemical processes, etc., can solve the problems of difficult rubber mixing and processing technology, the decline of material compression permanent deformation performance, etc., to overcome leakage and extrusion tearing phenomenon. Effect
CN103396591AActive Publication Date: 2013-11-20725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
725TH RES INST OF CHINA SHIPBUILDING INDAL CORP
Publication Date
2013-11-20
Patent Text Reader

Abstract

An oilfield ultrahigh-pressure acid-resistant rubber seal material comprises, by weight, 85-65 parts of hydrogenated butadiene-acrylonitrile rubber, 15-35 parts of butadiene-acrylonitrile rubber, 5-7 parts of zinc oxide, 1-4 parts of stearic acid, 1-2 parts of an antioxidant, 50-65 parts of nanometer carbon black, 15-25 parts of white carbon black, 5-10 parts of a phenolic resin, 5-10 parts of a softener, 3-6 parts of a peroxide vulcanizing agent, 6-8 parts of a vulcanizing aid, 1-3 parts of sulfur, and 2-4 parts of a promoter, wherein the sum of the weight parts of the hydrogenated butadiene-acrylonitrile rubber and the butadiene-acrylonitrile rubber is 100. A seal ring made through adopting the rubber seal material can satisfy the seal of oilfield high-pressure acid-resistant liquid (hydrochloric acid or hydrofluoric acid) pipelines, and overcomes the leakage and torn edge extrusion phenomena of seal members under a high hydraulic pressure.
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Description

technical field

[0001] The invention relates to a rubber sealing material, in particular to an oil field ultra-high pressure acid-resistant rubber sealing material. Background technique

[0002] With the expansion of oilfield mining to deep rock formations and deep sea areas, in order to increase the original recovery rate, it is necessary to inject high-pressure acid liquid into the formation to impact and corrode the underground rock formation, increase the crude oil dialysis rate and thus increase the production. High-pressure acid needs to be transported through pipelines, and the sealing of pipeline connections is very critical. The liquid pressure in the high-pressure pipeline is between 30 and 140MPa. The seals currently used can seal the hydraulic pipeline below 70MPa and basically meet the requirements for use. However, when used in a hydraulic environment above 100MPa, leakage and product bursting are prone to occur. As the difficulty of oilfield mining increases,...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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