METHOD OF OBTAINING OIL FIELD CONSTITUENT ELEMENT SWELLING IN HYDROCARBON SERVICE Russian patent published in 2017 - IPC C08J5/00 E21B33/12 C08C4/00 

FIELD: oil and gas industry.

SUBSTANCE: method of obtaining oil field constituent element swelling in hydrocarbon service from a composition comprising, pts. wt: ethylene-propylene-diene rubber with a content of moll.%: ethylene 60-77, ethylidene norbornene 0.9-8, propylene is the rest, - 100.0, cellulose ether 1.0-50.0, acrylic acid copolymer with acrylic acid amide or with potassium acrylate 60.0-150.0, carbon black 50.0-100.0, fine silica - 15.0-50.0, zinc oxide 3.0-7.0, stearic acid 1.5-3.0, antioxidants 1.0-2.0, vulcanization system: sulfur - 0.5-2.5 and vulcanization accelerators - 2.3-3.5 or organic peroxide 4.5-10.0 and co-agent of vulcanization (100% of active substance) - 3.6-5.0, technological additives - 1.0-3.0, by means of mixing which is carried out in two stages: all components, except for the curing system, are first mixed for 30-40 minutes at the temperature of the mixture at the end of mixing not more than 140°C, then after the mixture is cooled to 40-60°C, a curing system is introduced, mixed for 10-13 minutes at the mixture temperature at the end of mixing not more than 110°C, followed by forming the element under pressure of 12-20 MPa at a temperature of 150-170°C for 30-60 min.

EFFECT: increased degree of swelling in the hydrocarbon service and increased service life while simplifying the composition.

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